./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/twisted.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/twisted.c -s /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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 56facc094037ea8aa088ee9a4faafddcfe652feb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:57:53,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:53,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:53,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:53,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:53,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:53,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:53,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:53,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:53,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:53,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:53,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:53,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:53,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:53,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:53,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:53,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:53,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:53,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:53,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:53,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:53,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:53,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:53,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:53,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:53,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:53,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:53,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:53,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:53,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:53,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:53,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:53,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:53,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:53,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:53,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:53,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:53,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:53,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:53,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:53,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:53,429 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 08:57:53,455 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:53,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:53,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:53,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:53,457 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:53,457 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 08:57:53,457 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 08:57:53,457 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 08:57:53,458 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 08:57:53,458 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 08:57:53,458 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 08:57:53,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:53,458 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:57:53,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 08:57:53,459 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:53,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 08:57:53,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:53,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:53,460 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 08:57:53,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:53,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:53,461 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 08:57:53,462 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 08:57:53,463 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/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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 -> 56facc094037ea8aa088ee9a4faafddcfe652feb [2019-10-22 08:57:53,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:53,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:53,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:53,511 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:53,512 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:53,512 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/twisted.c [2019-10-22 08:57:53,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/data/9f0a2cba1/24592962d6074e82b82157d531647c0e/FLAG36c9d9d62 [2019-10-22 08:57:53,949 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:53,950 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/sv-benchmarks/c/termination-numeric/twisted.c [2019-10-22 08:57:53,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/data/9f0a2cba1/24592962d6074e82b82157d531647c0e/FLAG36c9d9d62 [2019-10-22 08:57:54,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/bin/uautomizer/data/9f0a2cba1/24592962d6074e82b82157d531647c0e [2019-10-22 08:57:54,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:54,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:54,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:54,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:54,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:54,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f365c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54, skipping insertion in model container [2019-10-22 08:57:54,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,352 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:54,364 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:54,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:54,505 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:54,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:54,596 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:54,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54 WrapperNode [2019-10-22 08:57:54,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:54,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:54,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:54,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:54,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:54,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:54,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:54,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:54,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... [2019-10-22 08:57:54,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:54,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:54,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:54,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:54,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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 [2019-10-22 08:57:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:54,940 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:54,940 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 08:57:54,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:54 BoogieIcfgContainer [2019-10-22 08:57:54,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:54,942 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 08:57:54,942 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 08:57:54,947 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 08:57:54,947 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:57:54,948 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 08:57:54" (1/3) ... [2019-10-22 08:57:54,949 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e3007cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:57:54, skipping insertion in model container [2019-10-22 08:57:54,949 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:57:54,949 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:54" (2/3) ... [2019-10-22 08:57:54,950 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e3007cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:57:54, skipping insertion in model container [2019-10-22 08:57:54,957 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:57:54,957 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:54" (3/3) ... [2019-10-22 08:57:54,961 INFO L371 chiAutomizerObserver]: Analyzing ICFG twisted.c [2019-10-22 08:57:55,023 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 08:57:55,023 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 08:57:55,023 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 08:57:55,023 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:55,023 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:55,024 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 08:57:55,024 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:55,024 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 08:57:55,048 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2019-10-22 08:57:55,076 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-10-22 08:57:55,076 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:55,076 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:55,084 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 08:57:55,084 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 08:57:55,084 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 08:57:55,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2019-10-22 08:57:55,086 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-10-22 08:57:55,086 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:55,086 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:55,087 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 08:57:55,087 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 08:57:55,095 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4;f_#in~k, f_#in~l := main_#t~nondet2, main_#t~nondet3;havoc f_#res;havoc f_#t~post0, f_#t~post1, f_~k, f_~l, f_~i~0, f_~j~0;f_~k := f_#in~k;f_~l := f_#in~l;f_~i~0 := 0;f_~j~0 := 0; 8#L18true [2019-10-22 08:57:55,096 INFO L793 eck$LassoCheckResult]: Loop: 8#L18true assume !true; 9#L13true goto; 5#L16true assume !!(f_~j~0 < f_~l);f_#t~post1 := f_~j~0;f_~j~0 := 1 + f_#t~post1;havoc f_#t~post1; 3#L15true assume !(0 != (if f_~i~0 < 0 && 0 != f_~i~0 % 2 then f_~i~0 % 2 - 2 else f_~i~0 % 2)); 8#L18true [2019-10-22 08:57:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-10-22 08:57:55,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:55,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452375121] [2019-10-22 08:57:55,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,229 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1450986, now seen corresponding path program 1 times [2019-10-22 08:57:55,232 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:55,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33597262] [2019-10-22 08:57:55,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:55,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33597262] [2019-10-22 08:57:55,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:55,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-10-22 08:57:55,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956097690] [2019-10-22 08:57:55,271 INFO L808 eck$LassoCheckResult]: loop already infeasible [2019-10-22 08:57:55,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:57:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:55,293 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 08:57:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:55,300 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2019-10-22 08:57:55,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:57:55,303 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2019-10-22 08:57:55,304 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-10-22 08:57:55,308 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 7 states and 10 transitions. [2019-10-22 08:57:55,309 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-10-22 08:57:55,309 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-10-22 08:57:55,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-10-22 08:57:55,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:57:55,310 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-10-22 08:57:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-10-22 08:57:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 08:57:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 08:57:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-10-22 08:57:55,344 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-10-22 08:57:55,344 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-10-22 08:57:55,344 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 08:57:55,345 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-10-22 08:57:55,345 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-10-22 08:57:55,346 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:55,346 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:55,346 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 08:57:55,346 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-10-22 08:57:55,346 INFO L791 eck$LassoCheckResult]: Stem: 35#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4;f_#in~k, f_#in~l := main_#t~nondet2, main_#t~nondet3;havoc f_#res;havoc f_#t~post0, f_#t~post1, f_~k, f_~l, f_~i~0, f_~j~0;f_~k := f_#in~k;f_~l := f_#in~l;f_~i~0 := 0;f_~j~0 := 0; 34#L18 [2019-10-22 08:57:55,346 INFO L793 eck$LassoCheckResult]: Loop: 34#L18 goto; 36#L9 assume !(f_~i~0 < f_~k); 37#L13 goto; 33#L16 assume !!(f_~j~0 < f_~l);f_#t~post1 := f_~j~0;f_~j~0 := 1 + f_#t~post1;havoc f_#t~post1; 32#L15 assume !(0 != (if f_~i~0 < 0 && 0 != f_~i~0 % 2 then f_~i~0 % 2 - 2 else f_~i~0 % 2)); 34#L18 [2019-10-22 08:57:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:55,347 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2019-10-22 08:57:55,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:55,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950717543] [2019-10-22 08:57:55,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,357 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:55,357 INFO L82 PathProgramCache]: Analyzing trace with hash 33506102, now seen corresponding path program 1 times [2019-10-22 08:57:55,358 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:55,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289037512] [2019-10-22 08:57:55,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,387 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:55,388 INFO L82 PathProgramCache]: Analyzing trace with hash 921009783, now seen corresponding path program 1 times [2019-10-22 08:57:55,388 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:55,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013926515] [2019-10-22 08:57:55,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,421 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:55,503 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:55,508 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:55,508 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:55,509 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:55,509 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:57:55,509 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:55,509 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:55,509 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:55,509 INFO L131 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration2_Loop [2019-10-22 08:57:55,509 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:55,510 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:55,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:55,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:55,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:55,726 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:55,727 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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 [2019-10-22 08:57:55,738 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:55,739 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:55,745 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:55,746 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_f_#t~post1=0} Honda state: {ULTIMATE.start_f_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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 [2019-10-22 08:57:55,752 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:55,752 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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 [2019-10-22 08:57:55,762 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:57:55,762 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:55,888 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:57:55,890 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:55,890 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:55,890 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:55,890 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:55,890 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:57:55,890 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:55,890 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:55,891 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:55,891 INFO L131 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration2_Loop [2019-10-22 08:57:55,891 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:55,891 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:55,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:55,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:55,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:55,992 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:55,997 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:57:55,999 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 [2019-10-22 08:57:56,001 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:56,001 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:56,002 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:56,002 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:56,002 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:56,004 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:56,005 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:56,011 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:57:56,018 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-10-22 08:57:56,019 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:57:56,021 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:57:56,021 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:57:56,022 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:57:56,022 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_f_~j~0, ULTIMATE.start_f_~l) = -1*ULTIMATE.start_f_~j~0 + 1*ULTIMATE.start_f_~l Supporting invariants [] [2019-10-22 08:57:56,026 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:57:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:56,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 08:57:56,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:56,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:56,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:56,104 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 [2019-10-22 08:57:56,105 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-10-22 08:57:56,135 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 15 states and 22 transitions. Complement of second has 4 states. [2019-10-22 08:57:56,135 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 [2019-10-22 08:57:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:57:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-10-22 08:57:56,138 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 1 letters. Loop has 5 letters. [2019-10-22 08:57:56,139 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:56,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 5 letters. [2019-10-22 08:57:56,140 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:56,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 1 letters. Loop has 10 letters. [2019-10-22 08:57:56,140 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:56,141 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2019-10-22 08:57:56,143 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:57:56,143 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 12 states and 17 transitions. [2019-10-22 08:57:56,143 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-10-22 08:57:56,144 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-10-22 08:57:56,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 17 transitions. [2019-10-22 08:57:56,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:57:56,144 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2019-10-22 08:57:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 17 transitions. [2019-10-22 08:57:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-10-22 08:57:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 08:57:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2019-10-22 08:57:56,146 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-10-22 08:57:56,146 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-10-22 08:57:56,146 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 08:57:56,146 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 16 transitions. [2019-10-22 08:57:56,147 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-10-22 08:57:56,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:56,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:56,147 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-10-22 08:57:56,148 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-10-22 08:57:56,148 INFO L791 eck$LassoCheckResult]: Stem: 96#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4;f_#in~k, f_#in~l := main_#t~nondet2, main_#t~nondet3;havoc f_#res;havoc f_#t~post0, f_#t~post1, f_~k, f_~l, f_~i~0, f_~j~0;f_~k := f_#in~k;f_~l := f_#in~l;f_~i~0 := 0;f_~j~0 := 0; 97#L18 goto; 98#L9 [2019-10-22 08:57:56,148 INFO L793 eck$LassoCheckResult]: Loop: 98#L9 assume !!(f_~i~0 < f_~k);f_#t~post0 := f_~i~0;f_~i~0 := 1 + f_#t~post0;havoc f_#t~post0; 101#L8 assume 0 != (if f_~i~0 < 0 && 0 != f_~i~0 % 2 then f_~i~0 % 2 - 2 else f_~i~0 % 2); 98#L9 [2019-10-22 08:57:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash 997, now seen corresponding path program 1 times [2019-10-22 08:57:56,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:56,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435544255] [2019-10-22 08:57:56,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:56,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:56,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,156 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-10-22 08:57:56,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:56,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021627253] [2019-10-22 08:57:56,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:56,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:56,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,168 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 958440, now seen corresponding path program 1 times [2019-10-22 08:57:56,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:56,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768019608] [2019-10-22 08:57:56,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:56,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:56,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,182 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:56,206 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:56,207 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:56,207 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:56,207 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:56,207 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:57:56,207 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:56,207 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:56,207 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:56,208 INFO L131 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration3_Loop [2019-10-22 08:57:56,208 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:56,208 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:56,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:56,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:56,316 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:56,316 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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) [2019-10-22 08:57:56,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:56,327 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:56,331 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:56,331 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_f_#t~post0=0} Honda state: {ULTIMATE.start_f_#t~post0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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) [2019-10-22 08:57:56,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:56,343 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bdab31bc-9977-4118-8dec-ade64322ade8/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) [2019-10-22 08:57:56,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:57:56,359 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:56,569 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:57:56,571 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:56,571 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:56,572 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:56,572 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:56,572 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:57:56,572 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:56,572 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:56,572 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:56,572 INFO L131 ssoRankerPreferences]: Filename of dumped script: twisted.c_Iteration3_Loop [2019-10-22 08:57:56,572 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:56,572 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:56,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:56,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:56,649 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:56,649 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:57:56,650 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 08:57:56,650 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:56,651 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:56,651 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:56,651 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:56,651 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:56,652 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:56,652 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:56,660 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:57:56,667 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-10-22 08:57:56,668 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:57:56,668 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:57:56,668 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:57:56,668 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:57:56,669 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_f_~i~0, ULTIMATE.start_f_~k) = -1*ULTIMATE.start_f_~i~0 + 1*ULTIMATE.start_f_~k Supporting invariants [] [2019-10-22 08:57:56,669 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:57:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:56,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 08:57:56,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:56,693 WARN L254 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:56,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:56,706 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 [2019-10-22 08:57:56,707 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 16 transitions. cyclomatic complexity: 7 Second operand 3 states. [2019-10-22 08:57:56,727 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 16 transitions. cyclomatic complexity: 7. Second operand 3 states. Result 21 states and 31 transitions. Complement of second has 4 states. [2019-10-22 08:57:56,727 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 [2019-10-22 08:57:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 08:57:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2019-10-22 08:57:56,728 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 2 letters. [2019-10-22 08:57:56,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:56,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 4 letters. Loop has 2 letters. [2019-10-22 08:57:56,729 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:56,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 2 letters. Loop has 4 letters. [2019-10-22 08:57:56,729 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:56,729 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 31 transitions. [2019-10-22 08:57:56,730 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:57:56,731 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 0 states and 0 transitions. [2019-10-22 08:57:56,731 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 08:57:56,731 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 08:57:56,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 08:57:56,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:57:56,734 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:56,734 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:56,734 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:56,734 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 08:57:56,734 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:57:56,735 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:57:56,735 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 08:57:56,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 08:57:56 BoogieIcfgContainer [2019-10-22 08:57:56,743 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 08:57:56,743 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:56,743 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:56,743 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:56,744 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:54" (3/4) ... [2019-10-22 08:57:56,748 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:57:56,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:56,751 INFO L168 Benchmark]: Toolchain (without parser) took 2415.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 949.9 MB in the beginning and 941.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 128.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,753 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:56,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -163.4 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.54 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. [2019-10-22 08:57:56,757 INFO L168 Benchmark]: Boogie Preprocessor took 17.68 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,758 INFO L168 Benchmark]: RCFGBuilder took 288.14 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: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,759 INFO L168 Benchmark]: BuchiAutomizer took 1800.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.6 MB in the end (delta: 153.2 MB). Peak memory consumption was 153.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,760 INFO L168 Benchmark]: Witness Printer took 5.58 ms. Allocated memory is still 1.1 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:56,762 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -163.4 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.54 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 17.68 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 288.14 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: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1800.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 941.6 MB in the end (delta: 153.2 MB). Peak memory consumption was 153.2 MB. Max. memory is 11.5 GB. * Witness Printer took 5.58 ms. Allocated memory is still 1.1 GB. Free memory is still 941.6 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 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * j + l and consists of 3 locations. One deterministic module has affine ranking function -1 * i + k and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 2 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.7s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 11 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 29 SDtfs, 17 SDslu, 11 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital33 mio100 ax100 hnf98 lsp88 ukn100 mio100 lsp100 div215 bol100 ite119 ukn100 eq149 hnf62 smp43 dnf100 smp100 tf106 neg98 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 23ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...