./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/a.01.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/a.01.c -s /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 403dc91589da6bf860a5e1f8b16384fde1e35c86 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:00:41,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:00:41,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:00:41,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:00:41,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:00:41,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:00:41,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:00:41,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:00:41,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:00:41,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:00:41,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:00:41,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:00:41,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:00:41,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:00:41,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:00:41,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:00:41,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:00:41,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:00:41,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:00:41,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:00:41,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:00:41,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:00:41,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:00:41,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:00:41,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:00:41,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:00:41,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:00:41,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:00:41,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:00:41,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:00:41,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:00:41,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:00:41,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:00:41,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:00:41,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:00:41,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:00:41,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:00:41,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:00:41,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:00:41,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:00:41,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:00:41,696 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 14:00:41,707 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:00:41,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:00:41,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:00:41,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:00:41,709 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:00:41,709 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 14:00:41,709 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 14:00:41,709 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 14:00:41,709 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 14:00:41,709 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 14:00:41,710 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 14:00:41,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:00:41,710 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:00:41,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:00:41,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:00:41,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 14:00:41,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 14:00:41,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:00:41,711 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 14:00:41,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:00:41,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:00:41,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:00:41,712 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 14:00:41,712 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 14:00:41,713 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 -> 403dc91589da6bf860a5e1f8b16384fde1e35c86 [2019-12-07 14:00:41,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:00:41,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:00:41,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:00:41,826 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:00:41,826 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:00:41,827 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/a.01.c [2019-12-07 14:00:41,864 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/data/0b5ab4d43/db7f4887d24d4b2098ba322eaaaa5cab/FLAGcf4177000 [2019-12-07 14:00:42,190 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:00:42,190 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/sv-benchmarks/c/termination-restricted-15/a.01.c [2019-12-07 14:00:42,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/data/0b5ab4d43/db7f4887d24d4b2098ba322eaaaa5cab/FLAGcf4177000 [2019-12-07 14:00:42,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/data/0b5ab4d43/db7f4887d24d4b2098ba322eaaaa5cab [2019-12-07 14:00:42,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:00:42,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:00:42,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:00:42,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:00:42,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:00:42,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ad8c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42, skipping insertion in model container [2019-12-07 14:00:42,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:00:42,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:00:42,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:00:42,321 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:00:42,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:00:42,375 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:00:42,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42 WrapperNode [2019-12-07 14:00:42,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:00:42,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:00:42,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:00:42,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:00:42,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:00:42,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:00:42,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:00:42,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:00:42,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... [2019-12-07 14:00:42,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:00:42,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:00:42,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:00:42,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:00:42,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:00:42,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:00:42,542 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:00:42,543 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 14:00:42,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:00:42 BoogieIcfgContainer [2019-12-07 14:00:42,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:00:42,544 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 14:00:42,544 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 14:00:42,548 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 14:00:42,549 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:00:42,549 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 02:00:42" (1/3) ... [2019-12-07 14:00:42,550 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2c2b7a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 02:00:42, skipping insertion in model container [2019-12-07 14:00:42,550 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:00:42,550 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:00:42" (2/3) ... [2019-12-07 14:00:42,551 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2c2b7a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 02:00:42, skipping insertion in model container [2019-12-07 14:00:42,551 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:00:42,552 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:00:42" (3/3) ... [2019-12-07 14:00:42,553 INFO L371 chiAutomizerObserver]: Analyzing ICFG a.01.c [2019-12-07 14:00:42,586 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 14:00:42,587 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 14:00:42,587 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 14:00:42,587 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:00:42,587 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:00:42,587 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 14:00:42,587 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:00:42,587 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 14:00:42,597 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 14:00:42,611 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 14:00:42,611 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:00:42,611 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:00:42,615 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 14:00:42,615 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:00:42,615 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 14:00:42,615 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 14:00:42,616 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 14:00:42,616 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:00:42,616 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:00:42,616 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 14:00:42,616 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:00:42,622 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 10#L11-2true [2019-12-07 14:00:42,622 INFO L796 eck$LassoCheckResult]: Loop: 10#L11-2true assume !!(main_~x~0 > 0);main_~y~0 := 0; 5#L13-2true assume !(main_~y~0 < main_~x~0); 3#L13-3true main_~x~0 := main_~x~0 - 1; 10#L11-2true [2019-12-07 14:00:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-12-07 14:00:42,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:42,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415735481] [2019-12-07 14:00:42,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,697 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:42,698 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-12-07 14:00:42,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:42,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658767778] [2019-12-07 14:00:42,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:42,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658767778] [2019-12-07 14:00:42,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:00:42,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:00:42,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415862160] [2019-12-07 14:00:42,738 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 14:00:42,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:00:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:00:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:00:42,750 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-12-07 14:00:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:00:42,765 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-12-07 14:00:42,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:00:42,767 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2019-12-07 14:00:42,767 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 14:00:42,769 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2019-12-07 14:00:42,770 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-12-07 14:00:42,770 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-12-07 14:00:42,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2019-12-07 14:00:42,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 14:00:42,771 INFO L688 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-12-07 14:00:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2019-12-07 14:00:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-12-07 14:00:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 14:00:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2019-12-07 14:00:42,788 INFO L711 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-12-07 14:00:42,788 INFO L591 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-12-07 14:00:42,788 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 14:00:42,788 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2019-12-07 14:00:42,788 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 14:00:42,788 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:00:42,788 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:00:42,789 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 14:00:42,789 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 14:00:42,789 INFO L794 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~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;main_~c~0 := 0; 27#L11-2 [2019-12-07 14:00:42,789 INFO L796 eck$LassoCheckResult]: Loop: 27#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 29#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 30#L13-2 assume !(main_~y~0 < main_~x~0); 26#L13-3 main_~x~0 := main_~x~0 - 1; 27#L11-2 [2019-12-07 14:00:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2019-12-07 14:00:42,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:42,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389624851] [2019-12-07 14:00:42,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,794 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:42,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2019-12-07 14:00:42,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:42,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677311811] [2019-12-07 14:00:42,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,804 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash 29869391, now seen corresponding path program 1 times [2019-12-07 14:00:42,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:42,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834102009] [2019-12-07 14:00:42,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:42,813 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:42,857 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:00:42,857 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:00:42,857 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:00:42,858 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:00:42,858 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:00:42,858 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:42,858 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:00:42,858 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:00:42,858 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration2_Loop [2019-12-07 14:00:42,858 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:00:42,859 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:00:42,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:42,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:42,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:42,942 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:00:42,942 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:42,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:00:42,947 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:42,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:00:42,955 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:00:43,031 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:00:43,032 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:00:43,033 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:00:43,033 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:00:43,033 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:00:43,033 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:00:43,033 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,033 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:00:43,033 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:00:43,033 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration2_Loop [2019-12-07 14:00:43,033 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:00:43,033 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:00:43,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,080 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:00:43,084 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:43,087 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 [2019-12-07 14:00:43,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:00:43,089 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:00:43,089 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:00:43,090 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:00:43,090 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:00:43,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:00:43,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:00:43,094 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:00:43,100 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 14:00:43,100 INFO L444 ModelExtractionUtils]: 1 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_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:43,104 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:00:43,104 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:00:43,105 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:00:43,105 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2019-12-07 14:00:43,108 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:00:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:00:43,150 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 [2019-12-07 14:00:43,150 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 3 states. [2019-12-07 14:00:43,174 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 9 states and 12 transitions. Complement of second has 4 states. [2019-12-07 14:00:43,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:00:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 14:00:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:00:43,176 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 4 letters. [2019-12-07 14:00:43,176 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,176 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 4 letters. [2019-12-07 14:00:43,176 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 8 letters. [2019-12-07 14:00:43,177 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,177 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 12 transitions. [2019-12-07 14:00:43,177 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:00:43,178 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 11 transitions. [2019-12-07 14:00:43,178 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-12-07 14:00:43,178 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-12-07 14:00:43,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2019-12-07 14:00:43,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:00:43,178 INFO L688 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-12-07 14:00:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2019-12-07 14:00:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-12-07 14:00:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 14:00:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-12-07 14:00:43,179 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 14:00:43,179 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 14:00:43,179 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 14:00:43,179 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-12-07 14:00:43,180 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:00:43,180 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:00:43,180 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:00:43,180 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 14:00:43,180 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-12-07 14:00:43,180 INFO L794 eck$LassoCheckResult]: Stem: 77#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~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;main_~c~0 := 0; 78#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 79#L13-2 [2019-12-07 14:00:43,180 INFO L796 eck$LassoCheckResult]: Loop: 79#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 79#L13-2 [2019-12-07 14:00:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-12-07 14:00:43,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:43,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974836432] [2019-12-07 14:00:43,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,186 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,186 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-12-07 14:00:43,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:43,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236608921] [2019-12-07 14:00:43,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,190 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-12-07 14:00:43,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:43,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232561597] [2019-12-07 14:00:43,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,197 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:43,203 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:00:43,204 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:00:43,204 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:00:43,204 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:00:43,204 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:00:43,204 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,204 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:00:43,204 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:00:43,204 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration3_Loop [2019-12-07 14:00:43,204 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:00:43,204 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:00:43,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,235 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:00:43,235 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:00:43,237 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:00:43,241 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:00:43,241 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_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:43,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:00:43,245 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,252 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:00:43,252 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:00:43,366 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:00:43,367 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:00:43,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:00:43,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:00:43,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:00:43,368 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:00:43,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:00:43,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:00:43,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration3_Loop [2019-12-07 14:00:43,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:00:43,368 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:00:43,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,399 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:00:43,399 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:43,402 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 [2019-12-07 14:00:43,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:00:43,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:00:43,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:00:43,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:00:43,406 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 14:00:43,407 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 14:00:43,409 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:43,413 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 [2019-12-07 14:00:43,414 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:00:43,414 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:00:43,414 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:00:43,414 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:00:43,414 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:00:43,415 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:00:43,415 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:00:43,417 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:00:43,421 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-12-07 14:00:43,421 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_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,429 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:00:43,429 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:00:43,429 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:00:43,429 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 [] [2019-12-07 14:00:43,431 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:00:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,455 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:43,456 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 [2019-12-07 14:00:43,456 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 2 states. [2019-12-07 14:00:43,466 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 15 states and 20 transitions. Complement of second has 5 states. [2019-12-07 14:00:43,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:00:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:00:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:00:43,466 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2019-12-07 14:00:43,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2019-12-07 14:00:43,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-12-07 14:00:43,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,467 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 20 transitions. [2019-12-07 14:00:43,468 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:00:43,468 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 11 states and 15 transitions. [2019-12-07 14:00:43,468 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-12-07 14:00:43,468 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2019-12-07 14:00:43,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 15 transitions. [2019-12-07 14:00:43,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:00:43,468 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2019-12-07 14:00:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 15 transitions. [2019-12-07 14:00:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 7. [2019-12-07 14:00:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 14:00:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2019-12-07 14:00:43,470 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2019-12-07 14:00:43,470 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2019-12-07 14:00:43,470 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 14:00:43,470 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2019-12-07 14:00:43,470 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:00:43,470 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:00:43,470 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:00:43,471 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-12-07 14:00:43,471 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-12-07 14:00:43,471 INFO L794 eck$LassoCheckResult]: Stem: 128#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~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;main_~c~0 := 0; 129#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 131#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 132#L13-2 assume !(main_~y~0 < main_~x~0); 126#L13-3 main_~x~0 := main_~x~0 - 1; 127#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 130#L13-2 [2019-12-07 14:00:43,471 INFO L796 eck$LassoCheckResult]: Loop: 130#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 130#L13-2 [2019-12-07 14:00:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 2 times [2019-12-07 14:00:43,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:43,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548083953] [2019-12-07 14:00:43,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:43,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548083953] [2019-12-07 14:00:43,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786311367] [2019-12-07 14:00:43,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:00:43,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:00:43,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:00:43,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:43,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:00:43,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-12-07 14:00:43,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484965932] [2019-12-07 14:00:43,522 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 14:00:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-12-07 14:00:43,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:00:43,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930678974] [2019-12-07 14:00:43,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:00:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:00:43,527 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:00:43,534 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:00:43,535 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:00:43,535 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:00:43,535 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:00:43,535 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:00:43,535 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,535 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:00:43,535 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:00:43,535 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration4_Loop [2019-12-07 14:00:43,535 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:00:43,535 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:00:43,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,570 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:00:43,570 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:00:43,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:00:43,578 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:00:43,578 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_311088fa-d3dd-4c2c-b626-f47847e7b537/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,582 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:00:43,582 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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 [2019-12-07 14:00:43,588 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:00:43,589 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:00:43,709 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:00:43,710 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:00:43,711 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:00:43,711 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:00:43,711 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:00:43,711 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:00:43,711 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,711 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:00:43,711 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:00:43,711 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration4_Loop [2019-12-07 14:00:43,711 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:00:43,711 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:00:43,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:00:43,745 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:00:43,745 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,748 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 [2019-12-07 14:00:43,749 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:00:43,749 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:00:43,749 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:00:43,749 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:00:43,751 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 14:00:43,751 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 14:00:43,754 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,758 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 [2019-12-07 14:00:43,759 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:00:43,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:00:43,759 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:00:43,759 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:00:43,760 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:00:43,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:00:43,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:00:43,762 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:00:43,767 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-12-07 14:00:43,767 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_311088fa-d3dd-4c2c-b626-f47847e7b537/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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:00:43,773 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:00:43,773 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:00:43,773 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:00:43,773 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 [] [2019-12-07 14:00:43,775 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:00:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,793 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:43,794 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 [2019-12-07 14:00:43,794 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 14:00:43,805 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 13 states and 17 transitions. Complement of second has 5 states. [2019-12-07 14:00:43,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:00:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:00:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:00:43,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-12-07 14:00:43,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,806 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:00:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,822 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:43,823 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 [2019-12-07 14:00:43,823 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 14:00:43,830 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 13 states and 17 transitions. Complement of second has 5 states. [2019-12-07 14:00:43,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:00:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:00:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:00:43,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-12-07 14:00:43,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,831 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:00:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:00:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:00:43,847 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:00:43,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:00:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:00:43,848 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 [2019-12-07 14:00:43,848 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 14:00:43,859 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 10 states and 12 transitions. Complement of second has 4 states. [2019-12-07 14:00:43,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:00:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:00:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-12-07 14:00:43,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2019-12-07 14:00:43,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2019-12-07 14:00:43,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2019-12-07 14:00:43,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:00:43,861 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2019-12-07 14:00:43,862 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:00:43,862 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 0 states and 0 transitions. [2019-12-07 14:00:43,862 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 14:00:43,862 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 14:00:43,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 14:00:43,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 14:00:43,862 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:00:43,862 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:00:43,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:00:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:00:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:00:43,863 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 6 states. [2019-12-07 14:00:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:00:43,863 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-12-07 14:00:43,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 14:00:43,863 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-12-07 14:00:43,863 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:00:43,864 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:00:43,864 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 14:00:43,864 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 14:00:43,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 14:00:43,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 14:00:43,864 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:00:43,864 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:00:43,864 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:00:43,864 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 14:00:43,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:00:43,864 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:00:43,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 14:00:43,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 02:00:43 BoogieIcfgContainer [2019-12-07 14:00:43,869 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 14:00:43,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:00:43,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:00:43,869 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:00:43,869 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:00:42" (3/4) ... [2019-12-07 14:00:43,871 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 14:00:43,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:00:43,873 INFO L168 Benchmark]: Toolchain (without parser) took 1667.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.2 MB). Free memory was 938.1 MB in the beginning and 849.5 MB in the end (delta: 88.5 MB). Peak memory consumption was 168.7 MB. Max. memory is 11.5 GB. [2019-12-07 14:00:43,873 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:00:43,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.2 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -135.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:00:43,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:00:43,874 INFO L168 Benchmark]: Boogie Preprocessor took 12.67 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:00:43,875 INFO L168 Benchmark]: RCFGBuilder took 133.57 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:00:43,875 INFO L168 Benchmark]: BuchiAutomizer took 1324.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 849.5 MB in the end (delta: 207.6 MB). Peak memory consumption was 207.6 MB. Max. memory is 11.5 GB. [2019-12-07 14:00:43,875 INFO L168 Benchmark]: Witness Printer took 2.78 ms. Allocated memory is still 1.1 GB. Free memory is still 849.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:00:43,877 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 170.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.2 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -135.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.67 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 133.57 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1324.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 849.5 MB in the end (delta: 207.6 MB). Peak memory consumption was 207.6 MB. Max. memory is 11.5 GB. * Witness Printer took 2.78 ms. Allocated memory is still 1.1 GB. Free memory is still 849.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 3 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. 2 modules have a trivial ranking function, the largest among these consists of 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.2s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 0.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 20 SDtfs, 14 SDslu, 3 SDs, 0 SdLazy, 42 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax201 hnf98 lsp50 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq158 hnf93 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...