./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dd635190a9aa277670265f46b90ecce0c321a2a9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:13:38,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:13:38,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:13:38,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:13:38,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:13:38,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:13:38,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:13:38,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:13:38,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:13:38,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:13:38,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:13:38,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:13:38,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:13:38,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:13:38,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:13:38,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:13:38,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:13:38,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:13:38,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:13:38,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:13:38,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:13:38,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:13:38,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:13:38,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:13:38,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:13:38,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:13:38,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:13:38,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:13:38,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:13:38,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:13:38,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:13:38,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:13:38,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:13:38,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:13:38,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:13:38,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:13:38,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:13:38,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:13:38,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:13:38,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:13:38,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:13:38,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-30 01:13:38,562 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:13:38,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:13:38,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:13:38,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:13:38,565 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:13:38,566 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 01:13:38,566 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 01:13:38,566 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 01:13:38,567 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 01:13:38,567 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 01:13:38,567 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 01:13:38,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:13:38,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:13:38,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:13:38,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:13:38,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 01:13:38,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 01:13:38,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 01:13:38,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:13:38,571 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 01:13:38,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:13:38,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 01:13:38,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:13:38,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:13:38,572 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 01:13:38,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:13:38,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:13:38,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:13:38,574 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 01:13:38,575 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 01:13:38,576 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_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd635190a9aa277670265f46b90ecce0c321a2a9 [2020-11-30 01:13:38,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:13:38,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:13:38,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:13:38,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:13:38,978 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:13:38,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/TwoWay.c [2020-11-30 01:13:39,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/data/3dd464ffe/829ed0a248a1471dbcb15b62b1b1f28f/FLAG9dbb6de7e [2020-11-30 01:13:39,659 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:13:39,660 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/sv-benchmarks/c/termination-numeric/TwoWay.c [2020-11-30 01:13:39,668 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/data/3dd464ffe/829ed0a248a1471dbcb15b62b1b1f28f/FLAG9dbb6de7e [2020-11-30 01:13:40,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/data/3dd464ffe/829ed0a248a1471dbcb15b62b1b1f28f [2020-11-30 01:13:40,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:13:40,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:13:40,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:13:40,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:13:40,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:13:40,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b13dbb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40, skipping insertion in model container [2020-11-30 01:13:40,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:13:40,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:13:40,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:13:40,321 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:13:40,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:13:40,380 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:13:40,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40 WrapperNode [2020-11-30 01:13:40,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:13:40,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:13:40,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:13:40,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:13:40,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:13:40,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:13:40,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:13:40,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:13:40,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... [2020-11-30 01:13:40,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:13:40,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:13:40,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:13:40,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:13:40,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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 [2020-11-30 01:13:40,560 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2020-11-30 01:13:40,561 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2020-11-30 01:13:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:13:40,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:13:40,829 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:13:40,830 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-30 01:13:40,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:40 BoogieIcfgContainer [2020-11-30 01:13:40,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:13:40,834 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 01:13:40,834 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 01:13:40,839 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 01:13:40,840 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 01:13:40,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 01:13:40" (1/3) ... [2020-11-30 01:13:40,842 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@38b10d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 01:13:40, skipping insertion in model container [2020-11-30 01:13:40,843 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 01:13:40,843 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:40" (2/3) ... [2020-11-30 01:13:40,844 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@38b10d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 01:13:40, skipping insertion in model container [2020-11-30 01:13:40,844 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 01:13:40,844 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:40" (3/3) ... [2020-11-30 01:13:40,846 INFO L373 chiAutomizerObserver]: Analyzing ICFG TwoWay.c [2020-11-30 01:13:40,932 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 01:13:40,932 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 01:13:40,933 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 01:13:40,933 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:13:40,933 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:13:40,933 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 01:13:40,934 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:13:40,934 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 01:13:40,950 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states. [2020-11-30 01:13:41,000 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 01:13:41,000 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:13:41,000 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:13:41,009 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-30 01:13:41,009 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-30 01:13:41,009 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 01:13:41,010 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states. [2020-11-30 01:13:41,012 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 01:13:41,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:13:41,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:13:41,013 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-30 01:13:41,013 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-30 01:13:41,021 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet5, main_#t~ret6, main_~x~0, main_~y~0, main_~z~0;main_~x~0 := main_#t~nondet3;havoc main_#t~nondet3; 9#L42true assume !(main_~x~0 < 0);main_~y~0 := main_#t~nondet4;havoc main_#t~nondet4; 15#L45true assume !(main_~y~0 < 0);main_~z~0 := main_#t~nondet5;havoc main_#t~nondet5; 4#L48true call main_#t~ret6 := twoWay(1, main_~x~0);< 11#twoWayENTRYtrue [2020-11-30 01:13:41,022 INFO L796 eck$LassoCheckResult]: Loop: 11#twoWayENTRYtrue ~terminate := #in~terminate;~n := #in~n; 17#L27true assume !(~n < 0);~m~0 := ~n; 8#L31true assume 0 != ~terminate;#t~post0 := ~m~0;~m~0 := #t~post0 - 1;havoc #t~post0; 6#L31-2true call #t~ret2 := twoWay(~terminate, ~m~0);< 11#twoWayENTRYtrue [2020-11-30 01:13:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1390414, now seen corresponding path program 1 times [2020-11-30 01:13:41,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:41,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613472854] [2020-11-30 01:13:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:41,148 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:41,157 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:41,177 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:13:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash 927613, now seen corresponding path program 1 times [2020-11-30 01:13:41,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:41,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245500542] [2020-11-30 01:13:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:41,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:41,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:41,211 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:13:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash -118689718, now seen corresponding path program 1 times [2020-11-30 01:13:41,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:41,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852455440] [2020-11-30 01:13:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:41,231 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:41,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:41,249 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:13:41,481 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:13:41,481 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:13:41,482 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:13:41,482 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:13:41,482 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 01:13:41,482 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:41,482 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:13:41,483 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:13:41,483 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration1_Loop [2020-11-30 01:13:41,483 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:13:41,483 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:13:41,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,546 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:41,774 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:13:41,777 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:41,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:41,787 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:41,799 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:41,799 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~ret2=0} Honda state: {twoWay_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:41,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:41,857 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:41,861 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:41,862 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_~m~0=0} Honda state: {twoWay_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:41,914 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:41,914 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:41,919 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:41,920 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#res=0} Honda state: {twoWay_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:41,972 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:41,972 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:41,981 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:41,981 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_~n=0} Honda state: {twoWay_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 01:13:42,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:42,038 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:42,100 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:13:42,101 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:42,213 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 01:13:42,216 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:13:42,216 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:13:42,217 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:13:42,217 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:13:42,217 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 01:13:42,217 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:42,217 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:13:42,218 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:13:42,218 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration1_Loop [2020-11-30 01:13:42,218 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:13:42,218 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:13:42,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:42,480 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:13:42,488 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 01:13:42,495 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:42,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:42,499 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:42,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:42,500 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:42,500 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:42,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:42,504 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:13:42,508 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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 [2020-11-30 01:13:42,549 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 [2020-11-30 01:13:42,552 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:42,552 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:42,552 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:42,552 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:42,552 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:42,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:42,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:13:42,562 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:42,601 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 [2020-11-30 01:13:42,608 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:42,608 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:42,608 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:42,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:42,609 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:42,615 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:42,615 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:13:42,622 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 01:13:42,628 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 01:13:42,628 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_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:42,646 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 01:13:42,646 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 01:13:42,647 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 01:13:42,647 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(twoWay_#in~n) = 2*twoWay_#in~n + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:42,694 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 01:13:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:42,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:13:42,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:13:42,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:42,990 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-11-30 01:13:42,991 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states. Second operand 5 states. [2020-11-30 01:13:43,294 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states.. Second operand 5 states. Result 44 states and 56 transitions. Complement of second has 16 states. [2020-11-30 01:13:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 01:13:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 01:13:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2020-11-30 01:13:43,300 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-30 01:13:43,301 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:13:43,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-30 01:13:43,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:13:43,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-30 01:13:43,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:13:43,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 56 transitions. [2020-11-30 01:13:43,309 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 01:13:43,314 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 22 states and 25 transitions. [2020-11-30 01:13:43,315 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-30 01:13:43,316 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2020-11-30 01:13:43,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 25 transitions. [2020-11-30 01:13:43,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 01:13:43,317 INFO L691 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 01:13:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 25 transitions. [2020-11-30 01:13:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2020-11-30 01:13:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:13:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-30 01:13:43,351 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-30 01:13:43,351 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-30 01:13:43,351 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 01:13:43,352 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2020-11-30 01:13:43,352 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 01:13:43,353 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:13:43,353 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:13:43,354 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:13:43,354 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-30 01:13:43,354 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet5, main_#t~ret6, main_~x~0, main_~y~0, main_~z~0;main_~x~0 := main_#t~nondet3;havoc main_#t~nondet3; 125#L42 assume !(main_~x~0 < 0);main_~y~0 := main_#t~nondet4;havoc main_#t~nondet4; 126#L45 assume !(main_~y~0 < 0);main_~z~0 := main_#t~nondet5;havoc main_#t~nondet5; 128#L48 call main_#t~ret6 := twoWay(1, main_~x~0);< 129#twoWayENTRY ~terminate := #in~terminate;~n := #in~n; 136#L27 assume !(~n < 0);~m~0 := ~n; 137#L31 assume !(0 != ~terminate);#t~post1 := ~m~0;~m~0 := 1 + #t~post1;havoc #t~post1; 131#L31-2 [2020-11-30 01:13:43,354 INFO L796 eck$LassoCheckResult]: Loop: 131#L31-2 call #t~ret2 := twoWay(~terminate, ~m~0);< 130#twoWayENTRY ~terminate := #in~terminate;~n := #in~n; 132#L27 assume !(~n < 0);~m~0 := ~n; 139#L31 assume 0 != ~terminate;#t~post0 := ~m~0;~m~0 := #t~post0 - 1;havoc #t~post0; 131#L31-2 [2020-11-30 01:13:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1527849353, now seen corresponding path program 1 times [2020-11-30 01:13:43,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:43,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753447593] [2020-11-30 01:13:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753447593] [2020-11-30 01:13:43,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:13:43,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:13:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233149910] [2020-11-30 01:13:43,445 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 01:13:43,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1847173, now seen corresponding path program 2 times [2020-11-30 01:13:43,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:43,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034167899] [2020-11-30 01:13:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:43,474 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:43,488 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:43,490 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:13:43,683 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:13:43,684 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:13:43,684 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:13:43,684 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:13:43,684 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 01:13:43,684 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:43,684 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:13:43,684 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:13:43,685 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration2_Loop [2020-11-30 01:13:43,685 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:13:43,685 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:13:43,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:43,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:43,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:43,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:43,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:43,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:43,893 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:13:43,893 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 01:13:43,899 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:43,899 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:43,905 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:43,905 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~ret2=0} Honda state: {twoWay_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:43,957 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:43,957 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:43,962 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:43,962 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~post0=0} Honda state: {twoWay_#t~post0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:44,029 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:44,029 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:13:44,043 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:44,043 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#t~post1=0} Honda state: {twoWay_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:44,105 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:44,106 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 [2020-11-30 01:13:44,111 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:44,111 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#res=0} Honda state: {twoWay_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 01:13:44,167 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:44,167 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:44,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:13:44,176 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {twoWay_#in~terminate=-1, twoWay_~terminate=-1} Honda state: {twoWay_#in~terminate=-1, twoWay_~terminate=-1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:44,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:13:44,227 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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 [2020-11-30 01:13:44,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:13:44,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:13:56,347 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-11-30 01:13:56,350 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:13:56,351 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:13:56,351 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:13:56,351 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:13:56,351 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 01:13:56,351 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:56,351 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:13:56,351 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:13:56,351 INFO L133 ssoRankerPreferences]: Filename of dumped script: TwoWay.c_Iteration2_Loop [2020-11-30 01:13:56,351 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:13:56,351 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:13:56,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:56,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:56,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:56,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:56,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:56,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:13:56,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:13:56,642 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 01:13:56,651 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 [2020-11-30 01:13:56,653 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:56,654 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:56,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:56,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:56,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:56,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:56,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:56,659 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:56,719 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 [2020-11-30 01:13:56,721 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:56,721 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:56,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:56,722 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:56,722 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:56,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:56,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:13:56,725 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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 [2020-11-30 01:13:56,770 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 [2020-11-30 01:13:56,772 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:56,772 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:56,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:56,773 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-30 01:13:56,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:56,777 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-30 01:13:56,777 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:13:56,794 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:56,840 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 [2020-11-30 01:13:56,842 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:56,842 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:56,842 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:56,842 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:56,842 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:56,843 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:56,844 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:56,846 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:56,894 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 [2020-11-30 01:13:56,897 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:56,897 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:56,897 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:56,897 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:56,897 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:56,898 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:56,899 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:56,905 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:56,944 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 [2020-11-30 01:13:56,946 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:13:56,946 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:13:56,946 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:13:56,946 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:13:56,946 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:13:56,949 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:13:56,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:13:56,954 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 01:13:56,963 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 01:13:56,963 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_b5b8aad6-191f-49f9-ba41-fbf7c7c83c4e/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) [2020-11-30 01:13:56,971 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 01:13:56,972 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 01:13:56,972 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 01:13:56,972 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(twoWay_~m~0) = 2*twoWay_~m~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:13:57,020 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 01:13:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:13:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:13:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:57,192 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-11-30 01:13:57,193 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 5 states. [2020-11-30 01:13:57,312 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 5 states. Result 25 states and 30 transitions. Complement of second has 11 states. [2020-11-30 01:13:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-30 01:13:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 01:13:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2020-11-30 01:13:57,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-30 01:13:57,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:13:57,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 4 letters. [2020-11-30 01:13:57,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:13:57,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 7 letters. Loop has 8 letters. [2020-11-30 01:13:57,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:13:57,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 30 transitions. [2020-11-30 01:13:57,320 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 01:13:57,321 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 29 transitions. [2020-11-30 01:13:57,321 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-11-30 01:13:57,322 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-11-30 01:13:57,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 29 transitions. [2020-11-30 01:13:57,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 01:13:57,323 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-30 01:13:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 29 transitions. [2020-11-30 01:13:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-30 01:13:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:13:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-11-30 01:13:57,332 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-30 01:13:57,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:13:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:13:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:13:57,339 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2020-11-30 01:13:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:13:57,375 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-30 01:13:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:13:57,375 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2020-11-30 01:13:57,376 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 01:13:57,376 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 0 states and 0 transitions. [2020-11-30 01:13:57,377 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 01:13:57,377 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 01:13:57,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 01:13:57,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 01:13:57,377 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:13:57,377 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:13:57,377 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:13:57,377 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 01:13:57,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:13:57,377 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 01:13:57,377 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 01:13:57,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 01:13:57 BoogieIcfgContainer [2020-11-30 01:13:57,394 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 01:13:57,395 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:13:57,396 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:13:57,397 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:13:57,397 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:40" (3/4) ... [2020-11-30 01:13:57,403 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:13:57,404 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:13:57,407 INFO L168 Benchmark]: Toolchain (without parser) took 17346.33 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 63.8 MB in the beginning and 57.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:57,412 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:13:57,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.31 ms. Allocated memory is still 92.3 MB. Free memory was 63.6 MB in the beginning and 71.4 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:57,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.84 ms. Allocated memory is still 92.3 MB. Free memory was 71.4 MB in the beginning and 70.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:13:57,416 INFO L168 Benchmark]: Boogie Preprocessor took 22.47 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 69.5 MB in the end (delta: 700.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:13:57,417 INFO L168 Benchmark]: RCFGBuilder took 380.94 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 59.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:57,419 INFO L168 Benchmark]: BuchiAutomizer took 16560.33 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 59.8 MB in the beginning and 58.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:57,420 INFO L168 Benchmark]: Witness Printer took 9.16 ms. Allocated memory is still 123.7 MB. Free memory was 57.9 MB in the beginning and 57.0 MB in the end (delta: 942.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:57,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.31 ms. Allocated memory is still 92.3 MB. Free memory was 63.6 MB in the beginning and 71.4 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.84 ms. Allocated memory is still 92.3 MB. Free memory was 71.4 MB in the beginning and 70.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.47 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 69.5 MB in the end (delta: 700.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 380.94 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 59.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 16560.33 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 59.8 MB in the beginning and 58.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. * Witness Printer took 9.16 ms. Allocated memory is still 123.7 MB. Free memory was 57.9 MB in the beginning and 57.0 MB in the end (delta: 942.5 kB). Peak memory consumption was 2.1 MB. 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 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function 2 * \old(n) + 1 and consists of 5 locations. One deterministic module has affine ranking function 2 * m + 1 and consists of 5 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 16.4s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 15.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 27 SDtfs, 29 SDslu, 9 SDs, 0 SdLazy, 47 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital23 mio100 ax100 hnf95 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq168 hnf92 smp100 dnf137 smp100 tf106 neg93 sie113 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 37ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 0 MotzkinApplications: 4 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 9 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 1 LassoNonterminationAnalysisTime: 12.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...