./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/McCarthy91-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/McCarthy91-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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 32bit --witnessprinter.graph.data.programhash 90ff89d2ba0517af453003604f3ee5a230759bec ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:09:32,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:09:32,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:09:32,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:09:32,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:09:32,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:09:32,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:09:32,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:09:32,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:09:32,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:09:32,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:09:32,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:09:32,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:09:32,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:09:32,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:09:32,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:09:32,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:09:32,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:09:32,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:09:32,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:09:32,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:09:32,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:09:32,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:09:32,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:09:32,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:09:32,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:09:32,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:09:32,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:09:32,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:09:32,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:09:32,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:09:32,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:09:32,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:09:32,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:09:32,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:09:32,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:09:32,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:09:32,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:09:32,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:09:32,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:09:32,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:09:32,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 21:09:32,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:09:32,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:09:32,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:09:32,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:09:32,401 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:09:32,402 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 21:09:32,402 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 21:09:32,402 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 21:09:32,402 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 21:09:32,402 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 21:09:32,403 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 21:09:32,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:09:32,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:09:32,403 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:09:32,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:09:32,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:09:32,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:09:32,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 21:09:32,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 21:09:32,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 21:09:32,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:09:32,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:09:32,405 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 21:09:32,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:09:32,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 21:09:32,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:09:32,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:09:32,406 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 21:09:32,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:09:32,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:09:32,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:09:32,407 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 21:09:32,408 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 21:09:32,408 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90ff89d2ba0517af453003604f3ee5a230759bec [2020-11-29 21:09:32,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:09:32,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:09:32,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:09:32,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:09:32,757 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:09:32,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/../../sv-benchmarks/c/recursive/McCarthy91-1.c [2020-11-29 21:09:32,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/data/1080baf49/f381dd9289d74e5bb1be970b0a839790/FLAG612ed3826 [2020-11-29 21:09:33,302 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:09:33,303 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/sv-benchmarks/c/recursive/McCarthy91-1.c [2020-11-29 21:09:33,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/data/1080baf49/f381dd9289d74e5bb1be970b0a839790/FLAG612ed3826 [2020-11-29 21:09:33,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/data/1080baf49/f381dd9289d74e5bb1be970b0a839790 [2020-11-29 21:09:33,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:09:33,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:09:33,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:09:33,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:09:33,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:09:33,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:09:33" (1/1) ... [2020-11-29 21:09:33,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ca0f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:33, skipping insertion in model container [2020-11-29 21:09:33,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:09:33" (1/1) ... [2020-11-29 21:09:33,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:09:33,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:09:33,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:09:33,978 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:09:33,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:09:34,008 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:09:34,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34 WrapperNode [2020-11-29 21:09:34,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:09:34,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:09:34,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:09:34,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:09:34,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:09:34,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:09:34,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:09:34,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:09:34,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... [2020-11-29 21:09:34,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:09:34,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:09:34,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:09:34,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:09:34,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:09:34,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:09:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:09:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:09:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-11-29 21:09:34,151 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-11-29 21:09:34,575 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:09:34,575 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 21:09:34,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:09:34 BoogieIcfgContainer [2020-11-29 21:09:34,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:09:34,580 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 21:09:34,580 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 21:09:34,583 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 21:09:34,584 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:09:34,584 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 09:09:33" (1/3) ... [2020-11-29 21:09:34,586 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b61898c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:09:34, skipping insertion in model container [2020-11-29 21:09:34,586 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:09:34,586 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:34" (2/3) ... [2020-11-29 21:09:34,587 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b61898c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:09:34, skipping insertion in model container [2020-11-29 21:09:34,587 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:09:34,587 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:09:34" (3/3) ... [2020-11-29 21:09:34,588 INFO L373 chiAutomizerObserver]: Analyzing ICFG McCarthy91-1.c [2020-11-29 21:09:34,662 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 21:09:34,662 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 21:09:34,662 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 21:09:34,662 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:09:34,662 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:09:34,662 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 21:09:34,662 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:09:34,663 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 21:09:34,681 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-11-29 21:09:34,712 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:09:34,712 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:09:34,712 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:09:34,721 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 21:09:34,721 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:09:34,721 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 21:09:34,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-11-29 21:09:34,726 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:09:34,726 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:09:34,727 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:09:34,727 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 21:09:34,727 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:09:34,736 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 6#L28true call main_#t~ret10 := f91(main_~x~0);< 18#f91ENTRYtrue [2020-11-29 21:09:34,736 INFO L796 eck$LassoCheckResult]: Loop: 18#f91ENTRYtrue ~x := #in~x; 5#L18true assume !(~x > 100); 19#L21true call #t~ret7 := f91(11 + ~x);< 18#f91ENTRYtrue [2020-11-29 21:09:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash 29879, now seen corresponding path program 1 times [2020-11-29 21:09:34,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:34,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691599742] [2020-11-29 21:09:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:34,898 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:34,938 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:34,972 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 46807, now seen corresponding path program 1 times [2020-11-29 21:09:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:34,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430053117] [2020-11-29 21:09:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:34,981 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:34,985 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:34,987 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 890142305, now seen corresponding path program 1 times [2020-11-29 21:09:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:34,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743705425] [2020-11-29 21:09:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:35,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:35,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:35,055 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:35,169 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:09:35,169 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:09:35,169 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:09:35,169 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:09:35,170 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:09:35,170 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:35,170 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:09:35,170 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:09:35,170 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration1_Loop [2020-11-29 21:09:35,170 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:09:35,170 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:09:35,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:35,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:35,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:35,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:35,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:35,303 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:09:35,304 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:35,315 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:35,316 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:35,330 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:35,330 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:35,372 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:35,373 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:35,376 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:35,376 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:35,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:35,402 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:35,424 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:35,425 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:35,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:35,448 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:35,452 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:35,452 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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 [2020-11-29 21:09:35,477 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:35,477 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:35,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:09:35,511 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:36,561 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:09:36,563 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:09:36,563 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:09:36,563 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:09:36,563 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:09:36,564 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:09:36,564 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:36,564 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:09:36,564 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:09:36,564 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration1_Loop [2020-11-29 21:09:36,564 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:09:36,564 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:09:36,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:36,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:36,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:36,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:36,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:36,698 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:09:36,703 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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 [2020-11-29 21:09:36,709 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:09:36,712 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:36,713 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:36,713 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:36,713 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:36,713 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:36,716 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:36,716 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:09:36,722 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:36,753 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:09:36,755 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:36,755 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:36,756 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:36,756 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:36,756 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:36,757 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:36,757 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:09:36,759 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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) [2020-11-29 21:09:36,805 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:09:36,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:36,807 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:36,807 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:36,807 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:36,807 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:36,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:36,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:36,811 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:36,860 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:36,863 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:36,863 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:36,864 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:36,864 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:36,864 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:36,865 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:36,865 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:09:36,867 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:36,898 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:09:36,900 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:36,900 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:36,900 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:36,900 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:36,900 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:36,901 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:36,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:09:36,904 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:09:36,908 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:09:36,908 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:36,941 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:09:36,941 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:09:36,941 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:09:36,942 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -2*f91_#in~x + 211 Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:36,964 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:09:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 21:09:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:09:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:37,131 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 21:09:37,132 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2020-11-29 21:09:37,308 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 35 states and 43 transitions. Complement of second has 12 states. [2020-11-29 21:09:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:09:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 21:09:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-11-29 21:09:37,315 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2020-11-29 21:09:37,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:09:37,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2020-11-29 21:09:37,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:09:37,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-29 21:09:37,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:09:37,318 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 43 transitions. [2020-11-29 21:09:37,322 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:09:37,339 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2020-11-29 21:09:37,340 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 21:09:37,340 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-11-29 21:09:37,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2020-11-29 21:09:37,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:09:37,344 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-11-29 21:09:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2020-11-29 21:09:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-29 21:09:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 21:09:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-11-29 21:09:37,383 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-29 21:09:37,383 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-29 21:09:37,383 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 21:09:37,384 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2020-11-29 21:09:37,388 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:09:37,388 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:09:37,388 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:09:37,389 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:37,390 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:37,390 INFO L794 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 105#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 106#L28 call main_#t~ret10 := f91(main_~x~0);< 116#f91ENTRY ~x := #in~x; 111#L18 assume !(~x > 100); 109#L21 call #t~ret7 := f91(11 + ~x);< 119#f91ENTRY ~x := #in~x; 108#L18 assume ~x > 100;#res := ~x - 10; 110#f91FINAL assume true; 117#f91EXIT >#29#return; 114#L21-1 [2020-11-29 21:09:37,390 INFO L796 eck$LassoCheckResult]: Loop: 114#L21-1 call #t~ret8 := f91(#t~ret7);< 118#f91ENTRY ~x := #in~x; 121#L18 assume !(~x > 100); 113#L21 call #t~ret7 := f91(11 + ~x);< 118#f91ENTRY ~x := #in~x; 121#L18 assume ~x > 100;#res := ~x - 10; 115#f91FINAL assume true; 120#f91EXIT >#29#return; 114#L21-1 [2020-11-29 21:09:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash -218206616, now seen corresponding path program 1 times [2020-11-29 21:09:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147228477] [2020-11-29 21:09:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:37,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:37,463 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:37,468 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1767505954, now seen corresponding path program 1 times [2020-11-29 21:09:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:37,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564055201] [2020-11-29 21:09:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:37,481 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:37,486 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:37,488 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1919740023, now seen corresponding path program 1 times [2020-11-29 21:09:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:37,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050580237] [2020-11-29 21:09:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:37,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:37,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:37,530 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:37,670 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:09:37,670 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:09:37,670 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:09:37,671 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:09:37,671 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:09:37,671 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:37,671 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:09:37,671 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:09:37,671 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration2_Loop [2020-11-29 21:09:37,671 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:09:37,671 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:09:37,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:37,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:37,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:37,758 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:09:37,758 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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 [2020-11-29 21:09:37,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:37,766 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:37,773 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:37,773 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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) [2020-11-29 21:09:37,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:37,817 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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 [2020-11-29 21:09:37,861 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:09:37,861 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:49,941 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-11-29 21:09:49,946 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:09:49,947 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:09:49,947 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:09:49,947 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:09:49,947 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:09:49,947 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:49,947 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:09:49,947 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:09:49,947 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration2_Loop [2020-11-29 21:09:49,947 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:09:49,947 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:09:49,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:50,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:50,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:50,181 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:09:50,181 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:50,205 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:09:50,207 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:50,207 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:50,207 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:50,207 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:50,207 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:50,208 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:50,208 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:50,210 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/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 [2020-11-29 21:09:50,239 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:09:50,240 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:09:50,240 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:09:50,241 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:09:50,241 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:09:50,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:09:50,245 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:09:50,245 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:09:50,252 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:09:50,257 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:09:50,257 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:50,268 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:09:50,268 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:09:50,268 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:09:50,268 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#t~ret7) = -2*f91_#t~ret7 + 201 Supporting invariants [] [2020-11-29 21:09:50,290 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:09:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:09:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:09:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:50,585 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 21:09:50,585 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 9 states. [2020-11-29 21:09:50,956 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 51 states and 73 transitions. Complement of second has 32 states. [2020-11-29 21:09:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-29 21:09:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:09:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2020-11-29 21:09:50,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2020-11-29 21:09:50,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:09:50,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2020-11-29 21:09:50,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:09:50,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2020-11-29 21:09:50,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:09:50,965 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2020-11-29 21:09:50,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-29 21:09:50,980 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2020-11-29 21:09:50,982 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-29 21:09:50,982 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2020-11-29 21:09:50,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2020-11-29 21:09:50,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:09:50,983 INFO L691 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2020-11-29 21:09:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2020-11-29 21:09:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-11-29 21:09:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 21:09:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2020-11-29 21:09:50,998 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-11-29 21:09:50,999 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-11-29 21:09:50,999 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 21:09:50,999 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2020-11-29 21:09:51,002 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-29 21:09:51,002 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:09:51,002 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:09:51,003 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:51,003 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:09:51,004 INFO L794 eck$LassoCheckResult]: Stem: 293#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 291#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 292#L28 call main_#t~ret10 := f91(main_~x~0);< 298#f91ENTRY ~x := #in~x; 296#L18 assume !(~x > 100); 297#L21 call #t~ret7 := f91(11 + ~x);< 316#f91ENTRY ~x := #in~x; 317#L18 assume ~x > 100;#res := ~x - 10; 308#f91FINAL assume true; 309#f91EXIT >#29#return; 301#L21-1 call #t~ret8 := f91(#t~ret7);< 314#f91ENTRY ~x := #in~x; 326#L18 assume !(~x > 100); 295#L21 [2020-11-29 21:09:51,004 INFO L796 eck$LassoCheckResult]: Loop: 295#L21 call #t~ret7 := f91(11 + ~x);< 315#f91ENTRY ~x := #in~x; 294#L18 assume !(~x > 100); 295#L21 [2020-11-29 21:09:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1987218266, now seen corresponding path program 2 times [2020-11-29 21:09:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:51,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408057555] [2020-11-29 21:09:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:51,043 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:51,057 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:51,067 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 57247, now seen corresponding path program 2 times [2020-11-29 21:09:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:51,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750456105] [2020-11-29 21:09:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:51,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:09:51,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:09:51,083 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:09:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash -609818202, now seen corresponding path program 3 times [2020-11-29 21:09:51,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150622163] [2020-11-29 21:09:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:51,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 21:09:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:09:51,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150622163] [2020-11-29 21:09:51,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:51,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 21:09:51,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708287299] [2020-11-29 21:09:51,251 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:09:51,251 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:09:51,252 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:09:51,252 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:09:51,252 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:09:51,252 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:51,252 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:09:51,252 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:09:51,252 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration3_Loop [2020-11-29 21:09:51,252 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:09:51,252 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:09:51,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:51,260 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:51,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:51,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:09:51,322 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:09:51,322 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:51,332 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:51,333 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:51,336 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:51,337 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:51,383 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:51,383 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:09:51,388 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:51,389 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:51,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:51,433 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:09:51,438 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:09:51,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:51,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:09:51,476 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:09:51,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:09:51,521 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,583 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-11-29 21:10:03,586 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:10:03,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:10:03,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:10:03,587 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:10:03,587 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:10:03,587 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,587 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:10:03,587 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:10:03,587 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration3_Loop [2020-11-29 21:10:03,587 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:10:03,587 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:10:03,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:03,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:03,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:03,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:03,684 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:10:03,684 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:10:03,713 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:03,716 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:03,717 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:03,717 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:03,717 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:03,717 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:03,718 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:03,719 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,723 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:10:03,759 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:03,761 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:03,761 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:03,761 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:03,761 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:03,761 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:03,762 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:03,762 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,764 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,786 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:03,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:03,788 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:03,788 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:03,788 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:03,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:03,788 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:03,788 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:10:03,790 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:10:03,813 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:03,816 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:03,816 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:03,816 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:03,816 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:03,816 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:03,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:03,819 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,823 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:10:03,828 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:10:03,828 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:03,853 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:10:03,853 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:10:03,854 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:10:03,854 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_~x) = -2*f91_~x + 189 Supporting invariants [] [2020-11-29 21:10:03,874 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:10:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:10:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:10:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:04,005 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 21:10:04,005 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-29 21:10:04,109 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2020-11-29 21:10:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:10:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2020-11-29 21:10:04,114 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 21:10:04,114 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:04,114 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:10:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:10:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:04,239 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 21:10:04,239 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-29 21:10:04,326 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2020-11-29 21:10:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:10:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2020-11-29 21:10:04,328 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 21:10:04,328 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:04,328 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:10:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:10:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:04,514 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 21:10:04,514 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-29 21:10:04,641 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 71 states and 100 transitions. Complement of second has 16 states. [2020-11-29 21:10:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:10:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2020-11-29 21:10:04,643 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 21:10:04,644 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:04,644 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2020-11-29 21:10:04,644 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:04,644 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2020-11-29 21:10:04,645 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:04,645 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2020-11-29 21:10:04,648 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 21:10:04,651 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2020-11-29 21:10:04,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-29 21:10:04,651 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2020-11-29 21:10:04,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2020-11-29 21:10:04,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:10:04,652 INFO L691 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2020-11-29 21:10:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2020-11-29 21:10:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-11-29 21:10:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 21:10:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-11-29 21:10:04,664 INFO L714 BuchiCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-11-29 21:10:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:10:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:10:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:10:04,668 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 8 states. [2020-11-29 21:10:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:10:04,832 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-11-29 21:10:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:10:04,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2020-11-29 21:10:04,836 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-11-29 21:10:04,838 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2020-11-29 21:10:04,839 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2020-11-29 21:10:04,839 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-11-29 21:10:04,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2020-11-29 21:10:04,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:10:04,839 INFO L691 BuchiCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-11-29 21:10:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2020-11-29 21:10:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-11-29 21:10:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 21:10:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-11-29 21:10:04,847 INFO L714 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-11-29 21:10:04,847 INFO L594 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-11-29 21:10:04,847 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 21:10:04,848 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2020-11-29 21:10:04,849 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-11-29 21:10:04,849 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:10:04,849 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:10:04,851 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 21:10:04,851 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2020-11-29 21:10:04,851 INFO L794 eck$LassoCheckResult]: Stem: 839#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 837#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 838#L28 call main_#t~ret10 := f91(main_~x~0);< 851#f91ENTRY ~x := #in~x; 883#L18 assume !(~x > 100); 866#L21 call #t~ret7 := f91(11 + ~x);< 867#f91ENTRY ~x := #in~x; 876#L18 assume !(~x > 100); 872#L21 call #t~ret7 := f91(11 + ~x);< 874#f91ENTRY ~x := #in~x; 877#L18 assume ~x > 100;#res := ~x - 10; 875#f91FINAL assume true; 873#f91EXIT >#29#return; 849#L21-1 call #t~ret8 := f91(#t~ret7);< 861#f91ENTRY ~x := #in~x; 891#L18 assume ~x > 100;#res := ~x - 10; 890#f91FINAL assume true; 887#f91EXIT >#31#return; 868#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 885#f91FINAL assume true; 884#f91EXIT >#29#return; 853#L21-1 call #t~ret8 := f91(#t~ret7);< 882#f91ENTRY [2020-11-29 21:10:04,851 INFO L796 eck$LassoCheckResult]: Loop: 882#f91ENTRY ~x := #in~x; 879#L18 assume !(~x > 100); 841#L21 call #t~ret7 := f91(11 + ~x);< 865#f91ENTRY ~x := #in~x; 844#L18 assume !(~x > 100); 842#L21 call #t~ret7 := f91(11 + ~x);< 878#f91ENTRY ~x := #in~x; 840#L18 assume ~x > 100;#res := ~x - 10; 843#f91FINAL assume true; 893#f91EXIT >#29#return; 846#L21-1 call #t~ret8 := f91(#t~ret7);< 859#f91ENTRY ~x := #in~x; 880#L18 assume ~x > 100;#res := ~x - 10; 881#f91FINAL assume true; 886#f91EXIT >#31#return; 868#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 885#f91FINAL assume true; 884#f91EXIT >#29#return; 854#L21-1 call #t~ret8 := f91(#t~ret7);< 882#f91ENTRY [2020-11-29 21:10:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:04,852 INFO L82 PathProgramCache]: Analyzing trace with hash -834951989, now seen corresponding path program 1 times [2020-11-29 21:10:04,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:04,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209465137] [2020-11-29 21:10:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:04,865 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:04,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:04,881 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:04,882 INFO L82 PathProgramCache]: Analyzing trace with hash -871747263, now seen corresponding path program 1 times [2020-11-29 21:10:04,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:04,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129795634] [2020-11-29 21:10:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:04,889 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:04,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:04,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:04,899 INFO L82 PathProgramCache]: Analyzing trace with hash 418853943, now seen corresponding path program 2 times [2020-11-29 21:10:04,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:04,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030088866] [2020-11-29 21:10:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 21:10:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:10:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 21:10:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:04,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-29 21:10:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:05,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:10:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:05,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 21:10:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 21:10:05,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030088866] [2020-11-29 21:10:05,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467690678] [2020-11-29 21:10:05,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:05,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:10:05,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:10:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:10:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 21:10:05,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:10:05,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 21:10:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332258554] [2020-11-29 21:10:05,476 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:10:05,476 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:10:05,477 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:10:05,477 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:10:05,477 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:10:05,477 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:05,477 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:10:05,477 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:10:05,477 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration4_Loop [2020-11-29 21:10:05,477 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:10:05,477 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:10:05,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:05,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:05,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:05,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:05,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:05,585 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:10:05,586 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:05,592 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:10:05,592 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:10:05,595 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:10:05,596 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:05,634 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:10:05,635 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:10:05,637 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:10:05,637 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:05,660 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:10:05,660 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:10:05,662 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:10:05,662 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:05,686 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:10:05,686 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:05,711 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:10:05,711 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:10:06,364 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:10:06,366 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:10:06,366 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:10:06,366 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:10:06,366 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:10:06,366 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:10:06,366 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:06,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:10:06,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:10:06,366 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration4_Loop [2020-11-29 21:10:06,366 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:10:06,366 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:10:06,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:06,372 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:06,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:06,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:06,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:06,422 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:10:06,422 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:10:06,434 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:06,436 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:06,436 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:06,436 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:06,436 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:06,436 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:06,437 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:06,437 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:06,442 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:06,466 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:06,467 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:06,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:06,467 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:06,467 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:06,467 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:06,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:06,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:10:06,482 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:06,513 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:06,514 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:06,514 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:06,514 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:06,514 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:06,514 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:06,524 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:06,525 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:10:06,526 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:06,552 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:06,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:06,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:06,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:06,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:06,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:06,557 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:06,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:10:06,559 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:10:06,561 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:10:06,561 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:06,564 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:10:06,565 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:10:06,565 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:10:06,565 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -1*f91_#in~x + 90 Supporting invariants [] [2020-11-29 21:10:06,585 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:10:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:10:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:06,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:06,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 21:10:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:10:07,098 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 21:10:07,098 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2020-11-29 21:10:07,642 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2020-11-29 21:10:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 21:10:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2020-11-29 21:10:07,645 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2020-11-29 21:10:07,646 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:07,646 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:10:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:07,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:07,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 21:10:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:10:08,062 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 21:10:08,062 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2020-11-29 21:10:08,597 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2020-11-29 21:10:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 21:10:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2020-11-29 21:10:08,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2020-11-29 21:10:08,601 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:08,601 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:10:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:08,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:08,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:10:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:10:08,911 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2020-11-29 21:10:08,911 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 11 states. [2020-11-29 21:10:09,631 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 11 states. Result 325 states and 417 transitions. Complement of second has 123 states. [2020-11-29 21:10:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 2 stem states 15 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 21:10:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 49 transitions. [2020-11-29 21:10:09,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2020-11-29 21:10:09,634 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:09,634 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2020-11-29 21:10:09,636 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:09,636 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2020-11-29 21:10:09,637 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:09,637 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 325 states and 417 transitions. [2020-11-29 21:10:09,660 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 25 [2020-11-29 21:10:09,667 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 325 states to 169 states and 230 transitions. [2020-11-29 21:10:09,667 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2020-11-29 21:10:09,668 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2020-11-29 21:10:09,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 230 transitions. [2020-11-29 21:10:09,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:10:09,668 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 230 transitions. [2020-11-29 21:10:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 230 transitions. [2020-11-29 21:10:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-11-29 21:10:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-29 21:10:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-11-29 21:10:09,686 INFO L714 BuchiCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-11-29 21:10:09,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:10:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 21:10:09,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:10:09,687 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 10 states. [2020-11-29 21:10:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:10:09,918 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2020-11-29 21:10:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 21:10:09,920 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138 states and 163 transitions. [2020-11-29 21:10:09,922 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:10:09,925 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138 states to 101 states and 121 transitions. [2020-11-29 21:10:09,925 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2020-11-29 21:10:09,926 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2020-11-29 21:10:09,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 121 transitions. [2020-11-29 21:10:09,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:10:09,926 INFO L691 BuchiCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-11-29 21:10:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states and 121 transitions. [2020-11-29 21:10:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-11-29 21:10:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 21:10:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-11-29 21:10:09,934 INFO L714 BuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-11-29 21:10:09,934 INFO L594 BuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-11-29 21:10:09,935 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 21:10:09,935 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 117 transitions. [2020-11-29 21:10:09,936 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:10:09,936 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:10:09,936 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:10:09,938 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-29 21:10:09,938 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:10:09,938 INFO L794 eck$LassoCheckResult]: Stem: 2644#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2642#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 2643#L28 call main_#t~ret10 := f91(main_~x~0);< 2656#f91ENTRY ~x := #in~x; 2649#L18 assume !(~x > 100); 2650#L21 call #t~ret7 := f91(11 + ~x);< 2668#f91ENTRY ~x := #in~x; 2670#L18 assume !(~x > 100); 2669#L21 call #t~ret7 := f91(11 + ~x);< 2698#f91ENTRY ~x := #in~x; 2700#L18 assume ~x > 100;#res := ~x - 10; 2699#f91FINAL assume true; 2697#f91EXIT >#29#return; 2693#L21-1 call #t~ret8 := f91(#t~ret7);< 2696#f91ENTRY ~x := #in~x; 2709#L18 assume ~x > 100;#res := ~x - 10; 2701#f91FINAL assume true; 2692#f91EXIT >#31#return; 2691#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 2689#f91FINAL assume true; 2688#f91EXIT >#29#return; 2682#L21-1 call #t~ret8 := f91(#t~ret7);< 2687#f91ENTRY ~x := #in~x; 2685#L18 assume !(~x > 100); 2663#L21 call #t~ret7 := f91(11 + ~x);< 2684#f91ENTRY ~x := #in~x; 2708#L18 assume ~x > 100;#res := ~x - 10; 2707#f91FINAL assume true; 2706#f91EXIT >#29#return; 2704#L21-1 call #t~ret8 := f91(#t~ret7);< 2705#f91ENTRY ~x := #in~x; 2720#L18 assume !(~x > 100); 2721#L21 call #t~ret7 := f91(11 + ~x);< 2672#f91ENTRY ~x := #in~x; 2738#L18 assume ~x > 100;#res := ~x - 10; 2736#f91FINAL assume true; 2729#f91EXIT >#29#return; 2654#L21-1 call #t~ret8 := f91(#t~ret7);< 2728#f91ENTRY [2020-11-29 21:10:09,938 INFO L796 eck$LassoCheckResult]: Loop: 2728#f91ENTRY ~x := #in~x; 2732#L18 assume !(~x > 100); 2730#L21 call #t~ret7 := f91(11 + ~x);< 2672#f91ENTRY ~x := #in~x; 2738#L18 assume ~x > 100;#res := ~x - 10; 2736#f91FINAL assume true; 2729#f91EXIT >#29#return; 2653#L21-1 call #t~ret8 := f91(#t~ret7);< 2728#f91ENTRY [2020-11-29 21:10:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1139827145, now seen corresponding path program 3 times [2020-11-29 21:10:09,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:09,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672851355] [2020-11-29 21:10:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:09,960 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:09,980 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:09,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:09,987 INFO L82 PathProgramCache]: Analyzing trace with hash 31195136, now seen corresponding path program 2 times [2020-11-29 21:10:09,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:09,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059104325] [2020-11-29 21:10:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:09,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:09,995 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:09,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash 424810952, now seen corresponding path program 4 times [2020-11-29 21:10:09,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:09,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253315847] [2020-11-29 21:10:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:10,028 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:10,056 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:10,075 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:10,221 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:10:10,221 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:10:10,221 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:10:10,222 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:10:10,222 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:10:10,222 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,222 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:10:10,222 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:10:10,222 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration5_Loop [2020-11-29 21:10:10,222 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:10:10,222 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:10:10,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,285 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:10:10,285 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:10:10,290 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:10:10,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:10:10,293 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,314 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:10:10,315 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,338 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:10:10,339 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:10:10,342 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:10:10,361 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:10:10,362 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:10:10,362 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:10:10,362 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:10:10,362 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:10:10,362 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,362 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:10:10,362 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:10:10,362 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-1.c_Iteration5_Loop [2020-11-29 21:10:10,362 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:10:10,362 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:10:10,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:10:10,453 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:10:10,453 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:10:10,462 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:10,464 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:10,464 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:10,464 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:10,464 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:10,464 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:10,465 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:10,465 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,467 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,499 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 21:10:10,500 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:10:10,500 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:10:10,500 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:10:10,500 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:10:10,500 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:10:10,501 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:10:10,501 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:10:10,503 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:10:10,505 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:10:10,505 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0739b23b-0522-43f0-a7e0-09fd3fef51aa/bin/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:10:10,507 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:10:10,507 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:10:10,507 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:10:10,507 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -2*f91_#in~x + 201 Supporting invariants [] [2020-11-29 21:10:10,528 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:10:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:10:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:10,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:10,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:10,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:10:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:10,772 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 21:10:10,772 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 21:10:10,979 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 107 states and 127 transitions. Complement of second has 12 states. [2020-11-29 21:10:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:10:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2020-11-29 21:10:10,982 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 21:10:10,983 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:10,983 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:10:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:11,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:11,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:10:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:11,254 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 21:10:11,255 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 21:10:11,545 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 125 states and 146 transitions. Complement of second has 24 states. [2020-11-29 21:10:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:10:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2020-11-29 21:10:11,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 21:10:11,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:11,548 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:10:11,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:11,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:11,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:11,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:10:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:11,826 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 21:10:11,826 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 21:10:11,984 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 147 states and 167 transitions. Complement of second has 13 states. [2020-11-29 21:10:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:10:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-11-29 21:10:11,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 21:10:11,991 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:11,991 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:10:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:10:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:12,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:12,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:10:12,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:12,246 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 21:10:12,246 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 21:10:12,651 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 182 states and 209 transitions. Complement of second has 48 states. [2020-11-29 21:10:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-29 21:10:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:10:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 27 transitions. [2020-11-29 21:10:12,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 21:10:12,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:12,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 46 letters. Loop has 8 letters. [2020-11-29 21:10:12,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:12,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 16 letters. [2020-11-29 21:10:12,654 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:10:12,655 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 209 transitions. [2020-11-29 21:10:12,658 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 21:10:12,658 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 0 states and 0 transitions. [2020-11-29 21:10:12,659 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 21:10:12,659 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 21:10:12,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 21:10:12,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 21:10:12,659 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:10:12,659 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:10:12,659 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:10:12,659 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 21:10:12,660 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:10:12,660 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 21:10:12,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 21:10:12,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 09:10:12 BoogieIcfgContainer [2020-11-29 21:10:12,666 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 21:10:12,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:10:12,667 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:10:12,667 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:10:12,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:09:34" (3/4) ... [2020-11-29 21:10:12,670 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 21:10:12,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:10:12,672 INFO L168 Benchmark]: Toolchain (without parser) took 38996.24 ms. Allocated memory was 77.6 MB in the beginning and 130.0 MB in the end (delta: 52.4 MB). Free memory was 43.3 MB in the beginning and 74.5 MB in the end (delta: -31.2 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:12,673 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory is still 59.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:12,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.45 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 43.0 MB in the beginning and 70.8 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:12,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.73 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:12,675 INFO L168 Benchmark]: Boogie Preprocessor took 19.45 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 68.5 MB in the end (delta: 826.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:12,675 INFO L168 Benchmark]: RCFGBuilder took 511.15 ms. Allocated memory is still 94.4 MB. Free memory was 68.3 MB in the beginning and 57.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:12,676 INFO L168 Benchmark]: BuchiAutomizer took 38086.21 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 57.6 MB in the beginning and 75.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:12,676 INFO L168 Benchmark]: Witness Printer took 4.29 ms. Allocated memory is still 130.0 MB. Free memory was 75.5 MB in the beginning and 74.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:12,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory is still 59.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 329.45 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 43.0 MB in the beginning and 70.8 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.73 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.45 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 68.5 MB in the end (delta: 826.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 511.15 ms. Allocated memory is still 94.4 MB. Free memory was 68.3 MB in the beginning and 57.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 38086.21 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 57.6 MB in the beginning and 75.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.29 ms. Allocated memory is still 130.0 MB. Free memory was 75.5 MB in the beginning and 74.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(x) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-f91(x+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * x + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(x) + 90 and consists of 18 locations. One nondeterministic module has affine ranking function -2 * \old(x) + 201 and consists of 11 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 38.0s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 30.3s. Construction of modules took 1.1s. Büchi inclusion checks took 6.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 48 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 97 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/24 HoareTripleCheckerStatistics: 181 SDtfs, 296 SDslu, 190 SDs, 0 SdLazy, 829 SolverSat, 238 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf110 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 12 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 26.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...