./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.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_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 7c08193784b646afd298f73ae6296b7af2e0cac1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:28:21,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:28:21,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:28:21,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:28:21,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:28:21,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:28:21,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:28:21,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:28:21,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:28:21,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:28:21,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:28:21,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:28:21,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:28:21,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:28:21,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:28:21,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:28:21,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:28:21,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:28:21,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:28:21,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:28:21,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:28:21,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:28:21,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:28:21,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:28:21,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:28:21,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:28:21,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:28:21,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:28:21,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:28:21,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:28:21,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:28:21,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:28:21,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:28:21,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:28:21,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:28:21,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:28:21,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:28:21,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:28:21,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:28:21,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:28:21,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:28:21,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 22:28:21,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:28:21,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:28:21,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:28:21,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:28:21,488 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:28:21,488 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 22:28:21,488 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 22:28:21,489 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 22:28:21,489 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 22:28:21,489 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 22:28:21,489 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 22:28:21,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:28:21,490 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:28:21,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:28:21,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:28:21,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 22:28:21,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 22:28:21,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 22:28:21,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:28:21,491 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 22:28:21,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:28:21,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 22:28:21,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:28:21,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:28:21,492 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 22:28:21,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:28:21,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:28:21,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:28:21,493 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 22:28:21,494 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 22:28:21,494 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_5c386088-bc73-40ee-9eaf-1f318630f8d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c08193784b646afd298f73ae6296b7af2e0cac1 [2020-11-29 22:28:21,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:28:21,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:28:21,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:28:21,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:28:21,798 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:28:21,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-11-29 22:28:21,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/data/0c491c4fa/6e0b5f4430874a5b8d6b0b3c625aff59/FLAG799feceef [2020-11-29 22:28:22,413 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:28:22,414 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-11-29 22:28:22,419 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/data/0c491c4fa/6e0b5f4430874a5b8d6b0b3c625aff59/FLAG799feceef [2020-11-29 22:28:22,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/bin/uautomizer/data/0c491c4fa/6e0b5f4430874a5b8d6b0b3c625aff59 [2020-11-29 22:28:22,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:28:22,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:28:22,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:28:22,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:28:22,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:28:22,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:28:22" (1/1) ... [2020-11-29 22:28:22,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f346fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:22, skipping insertion in model container [2020-11-29 22:28:22,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:28:22" (1/1) ... [2020-11-29 22:28:22,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:28:22,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:28:23,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:28:23,046 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:28:23,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:28:23,074 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:28:23,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23 WrapperNode [2020-11-29 22:28:23,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:28:23,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:28:23,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:28:23,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:28:23,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:28:23,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:28:23,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:28:23,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:28:23,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... [2020-11-29 22:28:23,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:28:23,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:28:23,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:28:23,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:28:23,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:28:23,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:28:23,366 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:28:23,367 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 22:28:23,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:28:23 BoogieIcfgContainer [2020-11-29 22:28:23,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:28:23,369 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 22:28:23,370 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 22:28:23,374 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 22:28:23,375 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:28:23,375 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 10:28:22" (1/3) ... [2020-11-29 22:28:23,376 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@502ba4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:28:23, skipping insertion in model container [2020-11-29 22:28:23,376 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:28:23,376 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:28:23" (2/3) ... [2020-11-29 22:28:23,377 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@502ba4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:28:23, skipping insertion in model container [2020-11-29 22:28:23,377 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:28:23,377 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:28:23" (3/3) ... [2020-11-29 22:28:23,379 INFO L373 chiAutomizerObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-11-29 22:28:23,429 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 22:28:23,430 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 22:28:23,430 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 22:28:23,430 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:28:23,430 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:28:23,430 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 22:28:23,430 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:28:23,431 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 22:28:23,442 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 22:28:23,457 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 22:28:23,457 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:28:23,457 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:28:23,463 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:28:23,463 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 22:28:23,464 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 22:28:23,464 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 22:28:23,465 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 22:28:23,465 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:28:23,465 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:28:23,465 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:28:23,466 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 22:28:23,473 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 6#L19-2true [2020-11-29 22:28:23,473 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 9#L21-2true assume !(main_~j~0 <= main_~i~0); 8#L21-3true main_~i~0 := 1 + main_~i~0; 6#L19-2true [2020-11-29 22:28:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 22:28:23,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:23,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856050980] [2020-11-29 22:28:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:23,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:23,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:23,572 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-29 22:28:23,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:23,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939370620] [2020-11-29 22:28:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:23,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:23,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:23,596 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:23,598 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2020-11-29 22:28:23,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:23,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932163526] [2020-11-29 22:28:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:23,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:23,614 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:23,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:23,793 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:23,793 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:23,794 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:23,794 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:23,794 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:28:23,794 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:23,794 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:23,795 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:23,795 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2020-11-29 22:28:23,795 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:23,795 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:23,817 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 22:28:23,828 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 22:28:23,834 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 22:28:23,993 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:23,994 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:24,002 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:24,002 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 [2020-11-29 22:28:24,012 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:28:24,013 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:24,043 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:24,043 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:28:24,048 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:28:24,048 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:24,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:24,071 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:24,119 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:28:24,119 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 [2020-11-29 22:28:24,241 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:28:24,243 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:24,243 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:24,243 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:24,244 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:24,244 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:28:24,244 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:24,244 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:24,244 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:24,244 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2020-11-29 22:28:24,244 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:24,244 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:24,247 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 22:28:24,254 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 22:28:24,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:28:24,379 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:24,384 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:24,392 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 22:28:24,395 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:24,395 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:24,396 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:24,396 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:24,409 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:28:24,409 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:28:24,418 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:24,466 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 22:28:24,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:24,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:24,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:24,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:24,477 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:28:24,478 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:28:24,487 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:24,532 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 22:28:24,534 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:24,534 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:28:24,535 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:24,535 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:24,535 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:24,538 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:28:24,538 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:24,542 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:28:24,560 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:28:24,560 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:24,580 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:28:24,580 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:28:24,580 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:28:24,581 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-11-29 22:28:24,613 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:28:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:24,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:28:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:24,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:28:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:24,779 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 22:28:24,798 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 22:28:24,799 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2020-11-29 22:28:24,894 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 4 states. Result 30 states and 48 transitions. Complement of second has 9 states. [2020-11-29 22:28:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 22:28:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:28:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 28 transitions. [2020-11-29 22:28:24,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-29 22:28:24,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:24,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 22:28:24,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:24,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-29 22:28:24,901 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:24,901 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 48 transitions. [2020-11-29 22:28:24,905 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 22:28:24,912 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 18 transitions. [2020-11-29 22:28:24,913 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-29 22:28:24,913 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 22:28:24,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2020-11-29 22:28:24,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:28:24,914 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2020-11-29 22:28:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2020-11-29 22:28:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-29 22:28:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 22:28:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2020-11-29 22:28:24,943 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2020-11-29 22:28:24,943 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2020-11-29 22:28:24,943 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 22:28:24,943 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 17 transitions. [2020-11-29 22:28:24,945 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 22:28:24,945 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:28:24,945 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:28:24,946 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 22:28:24,946 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:28:24,946 INFO L794 eck$LassoCheckResult]: Stem: 82#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 83#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 85#L21-2 [2020-11-29 22:28:24,947 INFO L796 eck$LassoCheckResult]: Loop: 85#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 91#L21-2 assume !(main_~j~0 <= main_~i~0); 88#L21-3 main_~i~0 := 1 + main_~i~0; 84#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 85#L21-2 [2020-11-29 22:28:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 22:28:24,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:24,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212239652] [2020-11-29 22:28:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:24,964 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:24,975 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:24,978 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:24,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1506610, now seen corresponding path program 1 times [2020-11-29 22:28:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:24,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571627773] [2020-11-29 22:28:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:25,004 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:25,009 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:25,010 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 1 times [2020-11-29 22:28:25,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:25,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158128643] [2020-11-29 22:28:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:25,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:25,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:25,051 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:25,102 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:25,102 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:25,103 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:25,103 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:25,103 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:28:25,103 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:25,103 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:25,103 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:25,103 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2020-11-29 22:28:25,103 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:25,104 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:25,105 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 22:28:25,166 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 22:28:25,170 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 22:28:25,259 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:25,259 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:25,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:25,264 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:25,268 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:28:25,269 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:25,311 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:25,311 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:25,317 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:28:25,317 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:25,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:25,363 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:25,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:28:25,409 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 [2020-11-29 22:28:25,584 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:28:25,586 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:25,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:25,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:25,587 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:25,587 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:28:25,587 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:25,587 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:25,587 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:25,587 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2020-11-29 22:28:25,587 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:25,587 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:25,589 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 22:28:25,625 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 22:28:25,629 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 22:28:25,719 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:25,720 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:25,731 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 22:28:25,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:25,734 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:25,734 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:25,734 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:25,742 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:28:25,742 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:25,749 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:25,792 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 22:28:25,794 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:25,795 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:25,795 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:25,795 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:25,807 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:28:25,807 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:28:25,811 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:25,851 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 22:28:25,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:25,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:28:25,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:25,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:25,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:25,856 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:28:25,856 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:28:25,859 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:28:25,865 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:28:25,865 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:25,872 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:28:25,872 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:28:25,872 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:28:25,872 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:25,897 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:28:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:25,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:28:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:28:25,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:28:25,963 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-29 22:28:25,963 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 7 Second operand 4 states. [2020-11-29 22:28:25,998 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 22 states and 31 transitions. Complement of second has 6 states. [2020-11-29 22:28:26,000 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 22:28:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:28:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-11-29 22:28:26,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 4 letters. [2020-11-29 22:28:26,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:26,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2020-11-29 22:28:26,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:26,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 8 letters. [2020-11-29 22:28:26,002 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:26,002 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2020-11-29 22:28:26,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 22:28:26,004 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 15 states and 22 transitions. [2020-11-29 22:28:26,004 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-11-29 22:28:26,004 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-29 22:28:26,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2020-11-29 22:28:26,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:28:26,004 INFO L691 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2020-11-29 22:28:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2020-11-29 22:28:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-29 22:28:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 22:28:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2020-11-29 22:28:26,006 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2020-11-29 22:28:26,006 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2020-11-29 22:28:26,007 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 22:28:26,007 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 21 transitions. [2020-11-29 22:28:26,007 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 22:28:26,007 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:28:26,008 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:28:26,008 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 22:28:26,008 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 22:28:26,008 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 158#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 159#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 163#L21-2 [2020-11-29 22:28:26,008 INFO L796 eck$LassoCheckResult]: Loop: 163#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 163#L21-2 [2020-11-29 22:28:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-29 22:28:26,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:26,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650586648] [2020-11-29 22:28:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,041 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-29 22:28:26,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:26,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359957202] [2020-11-29 22:28:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,046 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,049 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2020-11-29 22:28:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:26,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221631095] [2020-11-29 22:28:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,078 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:26,094 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:26,094 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:26,094 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:26,094 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:26,094 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:28:26,095 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:26,095 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:26,095 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:26,095 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2020-11-29 22:28:26,095 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:26,095 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:26,096 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 22:28:26,104 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 22:28:26,120 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 22:28:26,166 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:26,167 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,178 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:26,178 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:28:26,182 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:28:26,182 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:26,210 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 [2020-11-29 22:28:26,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:28:26,243 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:28:26,372 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:28:26,373 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:26,373 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:26,373 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:26,373 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:26,373 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:28:26,373 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:26,373 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:26,374 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:26,374 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2020-11-29 22:28:26,374 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:26,374 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:26,375 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 22:28:26,383 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 22:28:26,402 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 22:28:26,521 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:26,521 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,531 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 22:28:26,533 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:26,533 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:26,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:26,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:26,537 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:28:26,537 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:28:26,545 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,590 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 22:28:26,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:26,592 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:28:26,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:26,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:26,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:26,593 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:28:26,594 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 [2020-11-29 22:28:26,597 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:28:26,601 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:28:26,601 INFO L444 ModelExtractionUtils]: 0 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_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,604 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:28:26,604 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:28:26,605 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:28:26,605 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 2*ULTIMATE.start_main_~i~0 - 2*ULTIMATE.start_main_~j~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:26,640 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:28:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:28:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:26,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:28:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:26,680 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 22:28:26,681 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 22:28:26,681 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 21 transitions. cyclomatic complexity: 10 Second operand 2 states. [2020-11-29 22:28:26,703 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 21 transitions. cyclomatic complexity: 10. Second operand 2 states. Result 26 states and 38 transitions. Complement of second has 5 states. [2020-11-29 22:28:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 22:28:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 22:28:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-11-29 22:28:26,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-29 22:28:26,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:26,707 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 1 letters. [2020-11-29 22:28:26,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:26,707 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-29 22:28:26,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:26,707 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 38 transitions. [2020-11-29 22:28:26,709 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 22:28:26,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 22 states and 33 transitions. [2020-11-29 22:28:26,710 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-11-29 22:28:26,710 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-29 22:28:26,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 33 transitions. [2020-11-29 22:28:26,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:28:26,710 INFO L691 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2020-11-29 22:28:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 33 transitions. [2020-11-29 22:28:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-11-29 22:28:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 22:28:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2020-11-29 22:28:26,713 INFO L714 BuchiCegarLoop]: Abstraction has 18 states and 27 transitions. [2020-11-29 22:28:26,713 INFO L594 BuchiCegarLoop]: Abstraction has 18 states and 27 transitions. [2020-11-29 22:28:26,713 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 22:28:26,713 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 27 transitions. [2020-11-29 22:28:26,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 22:28:26,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:28:26,714 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:28:26,716 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2020-11-29 22:28:26,716 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 22:28:26,716 INFO L794 eck$LassoCheckResult]: Stem: 229#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 230#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 232#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 236#L21-2 assume !(main_~j~0 <= main_~i~0); 245#L21-3 main_~i~0 := 1 + main_~i~0; 243#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 239#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 238#L21-2 [2020-11-29 22:28:26,716 INFO L796 eck$LassoCheckResult]: Loop: 238#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 238#L21-2 [2020-11-29 22:28:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 2 times [2020-11-29 22:28:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:26,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385149185] [2020-11-29 22:28:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,757 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,758 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-29 22:28:26,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:26,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208638810] [2020-11-29 22:28:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,762 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,765 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 780807227, now seen corresponding path program 3 times [2020-11-29 22:28:26,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:26,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622132347] [2020-11-29 22:28:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,779 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:28:26,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:28:26,797 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:28:26,811 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:26,811 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:26,811 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:26,811 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:26,812 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:28:26,812 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:26,812 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:26,812 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:26,812 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2020-11-29 22:28:26,812 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:26,812 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:26,813 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 22:28:26,824 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 22:28:26,829 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 22:28:26,877 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:26,878 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:28:26,883 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:26,925 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:28:26,925 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:27,073 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:28:27,074 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:28:27,074 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:28:27,074 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:28:27,075 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:28:27,075 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:28:27,075 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:27,075 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:28:27,075 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:28:27,075 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2020-11-29 22:28:27,075 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:28:27,075 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:28:27,076 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 22:28:27,083 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 22:28:27,093 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 22:28:27,161 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:28:27,161 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c386088-bc73-40ee-9eaf-1f318630f8d1/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 22:28:27,166 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 22:28:27,168 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:28:27,168 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:28:27,168 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:28:27,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:28:27,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:28:27,169 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:28:27,170 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 22:28:27,173 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:28:27,178 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:28:27,178 INFO L444 ModelExtractionUtils]: 0 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_5c386088-bc73-40ee-9eaf-1f318630f8d1/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) [2020-11-29 22:28:27,182 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:28:27,182 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:28:27,182 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:28:27,182 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 2*ULTIMATE.start_main_~i~0 - 2*ULTIMATE.start_main_~j~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:28:27,203 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:28:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:27,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:28:27,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:27,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:28:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:27,245 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 22:28:27,246 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 22:28:27,246 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand 2 states. [2020-11-29 22:28:27,266 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand 2 states. Result 24 states and 35 transitions. Complement of second has 5 states. [2020-11-29 22:28:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 22:28:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 22:28:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-11-29 22:28:27,268 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 1 letters. [2020-11-29 22:28:27,268 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:27,268 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 22:28:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:28:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:27,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:28:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:27,311 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 22:28:27,312 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 22:28:27,312 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand 2 states. [2020-11-29 22:28:27,322 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand 2 states. Result 24 states and 35 transitions. Complement of second has 5 states. [2020-11-29 22:28:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 22:28:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 22:28:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-11-29 22:28:27,325 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 1 letters. [2020-11-29 22:28:27,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:27,326 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 22:28:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:28:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:27,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:28:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:27,370 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 22:28:27,371 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 22:28:27,371 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand 2 states. [2020-11-29 22:28:27,394 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand 2 states. Result 21 states and 30 transitions. Complement of second has 4 states. [2020-11-29 22:28:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 22:28:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 22:28:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-11-29 22:28:27,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 1 letters. [2020-11-29 22:28:27,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:27,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2020-11-29 22:28:27,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:27,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2020-11-29 22:28:27,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:28:27,396 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 30 transitions. [2020-11-29 22:28:27,397 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 22:28:27,397 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 0 states and 0 transitions. [2020-11-29 22:28:27,397 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 22:28:27,397 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 22:28:27,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 22:28:27,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 22:28:27,398 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:28:27,398 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:28:27,398 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:28:27,398 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 22:28:27,398 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:28:27,398 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 22:28:27,398 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 22:28:27,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 10:28:27 BoogieIcfgContainer [2020-11-29 22:28:27,404 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 22:28:27,404 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:28:27,404 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:28:27,404 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:28:27,405 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:28:23" (3/4) ... [2020-11-29 22:28:27,407 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 22:28:27,408 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:28:27,409 INFO L168 Benchmark]: Toolchain (without parser) took 4555.14 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 72.1 MB in the beginning and 44.1 MB in the end (delta: 28.0 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. [2020-11-29 22:28:27,410 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory was 56.3 MB in the beginning and 56.2 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:28:27,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.98 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 71.9 MB in the beginning and 106.1 MB in the end (delta: -34.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:28:27,411 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.61 ms. Allocated memory is still 127.9 MB. Free memory was 106.1 MB in the beginning and 104.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:28:27,412 INFO L168 Benchmark]: Boogie Preprocessor took 20.07 ms. Allocated memory is still 127.9 MB. Free memory was 104.8 MB in the beginning and 104.0 MB in the end (delta: 772.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:28:27,412 INFO L168 Benchmark]: RCFGBuilder took 241.50 ms. Allocated memory is still 127.9 MB. Free memory was 104.0 MB in the beginning and 95.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:28:27,413 INFO L168 Benchmark]: BuchiAutomizer took 4034.34 ms. Allocated memory is still 127.9 MB. Free memory was 95.6 MB in the beginning and 45.1 MB in the end (delta: 50.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.1 GB. [2020-11-29 22:28:27,413 INFO L168 Benchmark]: Witness Printer took 3.50 ms. Allocated memory is still 127.9 MB. Free memory was 45.1 MB in the beginning and 44.1 MB in the end (delta: 961.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:28:27,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory was 56.3 MB in the beginning and 56.2 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 215.98 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 71.9 MB in the beginning and 106.1 MB in the end (delta: -34.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.61 ms. Allocated memory is still 127.9 MB. Free memory was 106.1 MB in the beginning and 104.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.07 ms. Allocated memory is still 127.9 MB. Free memory was 104.8 MB in the beginning and 104.0 MB in the end (delta: 772.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 241.50 ms. Allocated memory is still 127.9 MB. Free memory was 104.0 MB in the beginning and 95.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4034.34 ms. Allocated memory is still 127.9 MB. Free memory was 95.6 MB in the beginning and 45.1 MB in the end (delta: 50.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.50 ms. Allocated memory is still 127.9 MB. Free memory was 45.1 MB in the beginning and 44.1 MB in the end (delta: 961.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (0 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -1 * i and consists of 6 locations. One deterministic module has affine ranking function n + -1 * i and consists of 4 locations. One deterministic module has affine ranking function 2 * i + -2 * j + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * i + -2 * j + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.9s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 3.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 18 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 26 SDtfs, 32 SDslu, 9 SDs, 0 SdLazy, 50 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax191 hnf98 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf93 smp100 dnf100 smp100 tf110 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...