./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:53:00,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:53:00,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:53:00,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:53:00,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:53:00,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:53:00,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:53:00,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:53:00,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:53:00,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:53:00,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:53:00,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:53:00,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:53:00,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:53:00,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:53:00,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:53:00,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:53:00,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:53:00,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:53:00,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:53:00,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:53:00,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:53:00,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:53:00,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:53:00,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:53:00,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:53:00,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:53:00,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:53:00,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:53:00,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:53:00,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:53:00,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:53:00,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:53:00,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:53:00,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:53:00,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:53:00,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:53:00,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:53:00,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:53:00,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:53:00,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:53:00,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-30 00:53:00,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:53:00,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:53:00,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:53:00,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:53:00,869 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:53:00,870 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 00:53:00,870 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 00:53:00,870 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 00:53:00,870 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 00:53:00,871 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 00:53:00,872 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 00:53:00,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:53:00,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:53:00,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:53:00,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:53:00,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 00:53:00,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 00:53:00,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 00:53:00,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:53:00,874 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 00:53:00,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:53:00,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 00:53:00,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:53:00,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:53:00,876 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 00:53:00,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:53:00,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:53:00,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:53:00,877 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 00:53:00,880 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 00:53:00,881 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 [2020-11-30 00:53:01,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:53:01,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:53:01,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:53:01,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:53:01,341 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:53:01,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2020-11-30 00:53:01,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/data/e8c3b0c6d/af72031263604109a6516df8670c7bb9/FLAGa7a8a8eab [2020-11-30 00:53:02,131 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:53:02,132 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2020-11-30 00:53:02,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/data/e8c3b0c6d/af72031263604109a6516df8670c7bb9/FLAGa7a8a8eab [2020-11-30 00:53:02,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/data/e8c3b0c6d/af72031263604109a6516df8670c7bb9 [2020-11-30 00:53:02,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:53:02,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:53:02,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:53:02,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:53:02,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:53:02,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19373cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02, skipping insertion in model container [2020-11-30 00:53:02,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:53:02,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:53:02,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:53:02,792 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:53:02,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:53:02,847 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:53:02,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02 WrapperNode [2020-11-30 00:53:02,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:53:02,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:53:02,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:53:02,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:53:02,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:53:02,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:53:02,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:53:02,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:53:02,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... [2020-11-30 00:53:02,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:53:02,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:53:02,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:53:02,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:53:02,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:53:03,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:53:03,197 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:53:03,198 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-30 00:53:03,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:53:03 BoogieIcfgContainer [2020-11-30 00:53:03,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:53:03,202 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 00:53:03,202 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 00:53:03,209 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 00:53:03,210 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:53:03,210 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 12:53:02" (1/3) ... [2020-11-30 00:53:03,211 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2bfa76f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:53:03, skipping insertion in model container [2020-11-30 00:53:03,212 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:53:03,212 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:53:02" (2/3) ... [2020-11-30 00:53:03,212 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2bfa76f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:53:03, skipping insertion in model container [2020-11-30 00:53:03,212 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:53:03,213 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:53:03" (3/3) ... [2020-11-30 00:53:03,214 INFO L373 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a-modified.c [2020-11-30 00:53:03,294 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 00:53:03,294 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 00:53:03,294 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 00:53:03,294 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:53:03,294 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:53:03,294 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 00:53:03,295 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:53:03,295 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 00:53:03,310 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-11-30 00:53:03,333 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:03,333 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:53:03,333 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:53:03,340 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:53:03,341 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:53:03,341 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 00:53:03,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-11-30 00:53:03,342 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:03,343 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:53:03,343 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:53:03,343 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:53:03,343 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:53:03,352 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 5#L18-2true [2020-11-30 00:53:03,353 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(main_~x~0 != main_~K~0); 7#L18true assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 5#L18-2true [2020-11-30 00:53:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-30 00:53:03,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:03,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115382137] [2020-11-30 00:53:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:03,477 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:03,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:03,509 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:03,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-11-30 00:53:03,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:03,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305447887] [2020-11-30 00:53:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:03,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:03,575 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:03,579 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-11-30 00:53:03,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:03,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198812277] [2020-11-30 00:53:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:03,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:03,606 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:03,611 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:03,793 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2020-11-30 00:53:03,849 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:03,849 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:03,850 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:03,850 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:03,850 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:53:03,850 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:03,851 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:03,851 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:03,851 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2020-11-30 00:53:03,851 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:03,852 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:03,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:03,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:03,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:04,002 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:04,003 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:04,011 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:04,011 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:04,022 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:53:04,023 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:04,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:04,071 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:04,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:53:04,077 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:04,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:04,128 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:04,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:53:04,185 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:53:04,546 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:53:04,549 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:04,549 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:04,549 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:04,550 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:04,550 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:53:04,550 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:04,550 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:04,550 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:04,550 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2020-11-30 00:53:04,551 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:04,551 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:04,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:04,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:04,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:04,662 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:04,670 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:04,681 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:53:04,684 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:53:04,685 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:53:04,685 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:53:04,686 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:53:04,686 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:53:04,689 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:53:04,689 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:53:04,693 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:53:04,700 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-30 00:53:04,700 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:04,710 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:53:04,710 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:53:04,711 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:53:04,711 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:04,754 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:53:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:53:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:04,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:04,913 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 [2020-11-30 00:53:04,914 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2020-11-30 00:53:04,979 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2020-11-30 00:53:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:53:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:53:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-30 00:53:04,984 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2020-11-30 00:53:04,985 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:04,985 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-30 00:53:04,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:04,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2020-11-30 00:53:04,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:04,987 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2020-11-30 00:53:04,994 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:05,000 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2020-11-30 00:53:05,001 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-11-30 00:53:05,001 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-30 00:53:05,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-11-30 00:53:05,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:53:05,003 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-30 00:53:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-11-30 00:53:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-30 00:53:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 00:53:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-11-30 00:53:05,035 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-30 00:53:05,036 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-11-30 00:53:05,036 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 00:53:05,036 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-11-30 00:53:05,037 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:05,038 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:53:05,038 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:53:05,038 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-30 00:53:05,039 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:53:05,039 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 69#L18-2 assume !!(main_~x~0 != main_~K~0); 67#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 63#L18-2 [2020-11-30 00:53:05,039 INFO L796 eck$LassoCheckResult]: Loop: 63#L18-2 assume !!(main_~x~0 != main_~K~0); 64#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 63#L18-2 [2020-11-30 00:53:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-11-30 00:53:05,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:05,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429833960] [2020-11-30 00:53:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:05,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:05,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:05,075 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2020-11-30 00:53:05,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:05,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619590919] [2020-11-30 00:53:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:05,089 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:05,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:05,101 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2020-11-30 00:53:05,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:05,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203404888] [2020-11-30 00:53:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203404888] [2020-11-30 00:53:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7210827] [2020-11-30 00:53:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-30 00:53:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:53:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:05,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:53:05,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-30 00:53:05,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748978136] [2020-11-30 00:53:05,327 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:05,327 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:05,327 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:05,327 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:05,327 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:53:05,328 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:05,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:05,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2020-11-30 00:53:05,328 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:05,328 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:05,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:05,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:05,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:05,439 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:05,440 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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) [2020-11-30 00:53:05,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:05,448 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,453 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:53:05,453 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:05,498 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:53:05,503 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:53:05,503 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,546 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:05,546 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,584 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:53:05,584 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:53:05,850 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:53:05,853 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:05,853 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:05,853 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:05,853 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:05,853 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:53:05,854 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,854 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:05,854 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:05,854 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2020-11-30 00:53:05,854 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:05,854 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:05,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:05,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:05,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:05,951 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:05,951 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:05,985 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:53:05,987 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:53:05,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:53:05,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:53:05,988 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:05,999 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:53:06,000 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:53:06,005 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:06,050 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:53:06,052 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:53:06,052 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:53:06,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:53:06,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:53:06,057 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:53:06,057 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:53:06,065 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:06,113 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:53:06,115 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:53:06,116 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:53:06,116 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:53:06,116 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:53:06,116 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:53:06,118 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:53:06,118 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:53:06,124 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:53:06,129 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-30 00:53:06,129 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:06,134 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:53:06,134 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:53:06,135 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:53:06,135 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:06,161 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:53:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:06,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:53:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:06,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:06,214 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 [2020-11-30 00:53:06,215 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-30 00:53:06,403 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 11 states and 16 transitions. Complement of second has 5 states. [2020-11-30 00:53:06,403 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 [2020-11-30 00:53:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:53:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 00:53:06,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-30 00:53:06,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:06,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2020-11-30 00:53:06,405 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:06,405 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-30 00:53:06,406 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:06,406 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2020-11-30 00:53:06,407 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:06,408 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2020-11-30 00:53:06,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-30 00:53:06,408 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-30 00:53:06,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2020-11-30 00:53:06,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:53:06,408 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-11-30 00:53:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2020-11-30 00:53:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-30 00:53:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 00:53:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-11-30 00:53:06,411 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-11-30 00:53:06,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:53:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:53:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:53:06,419 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2020-11-30 00:53:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:53:06,462 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2020-11-30 00:53:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:53:06,463 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2020-11-30 00:53:06,464 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:06,465 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2020-11-30 00:53:06,465 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-30 00:53:06,465 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-30 00:53:06,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2020-11-30 00:53:06,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:53:06,466 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-11-30 00:53:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2020-11-30 00:53:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2020-11-30 00:53:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-30 00:53:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-11-30 00:53:06,467 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-30 00:53:06,467 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-30 00:53:06,467 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 00:53:06,468 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-11-30 00:53:06,468 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:06,468 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:53:06,468 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:53:06,469 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-30 00:53:06,469 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:53:06,469 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 158#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2020-11-30 00:53:06,469 INFO L796 eck$LassoCheckResult]: Loop: 154#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 153#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2020-11-30 00:53:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-30 00:53:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:06,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923362883] [2020-11-30 00:53:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:06,476 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:06,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:06,484 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2020-11-30 00:53:06,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:06,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261050227] [2020-11-30 00:53:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:06,492 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:06,495 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:06,497 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:06,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:06,503 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2020-11-30 00:53:06,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:06,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260466465] [2020-11-30 00:53:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:06,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:06,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:06,528 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:06,563 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:06,563 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:06,563 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:06,563 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:06,563 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:53:06,563 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:06,563 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:06,564 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:06,564 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2020-11-30 00:53:06,564 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:06,564 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:06,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:06,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:06,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:06,699 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:06,700 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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) [2020-11-30 00:53:06,706 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:06,706 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:06,711 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:53:06,712 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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) [2020-11-30 00:53:06,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:06,771 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:06,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:53:06,829 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:09,363 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:53:09,365 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:09,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:09,366 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:09,366 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:09,366 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:53:09,366 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:09,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:09,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:09,366 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2020-11-30 00:53:09,366 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:09,366 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:09,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:09,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:09,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:09,555 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:09,555 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:09,569 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:53:09,571 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:53:09,571 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:09,576 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:53:09,576 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-30 00:53:09,576 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:53:09,581 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-30 00:53:09,581 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:53:09,586 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:53:09,591 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:53:09,591 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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) [2020-11-30 00:53:09,599 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:53:09,599 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:53:09,599 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:53:09,600 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~K~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~K~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:09,644 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:53:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:53:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:09,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:09,731 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 [2020-11-30 00:53:09,731 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-11-30 00:53:09,751 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 11 states and 13 transitions. Complement of second has 5 states. [2020-11-30 00:53:09,752 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 [2020-11-30 00:53:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:53:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-30 00:53:09,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-30 00:53:09,753 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:09,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-30 00:53:09,753 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:09,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2020-11-30 00:53:09,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:09,754 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2020-11-30 00:53:09,755 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:09,755 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2020-11-30 00:53:09,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-11-30 00:53:09,756 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-11-30 00:53:09,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-11-30 00:53:09,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:53:09,756 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-30 00:53:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-11-30 00:53:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2020-11-30 00:53:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-30 00:53:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-11-30 00:53:09,758 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-30 00:53:09,758 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-30 00:53:09,759 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 00:53:09,759 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-11-30 00:53:09,759 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:53:09,759 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:53:09,760 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:53:09,760 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2020-11-30 00:53:09,760 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:53:09,761 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 203#L18-2 assume !!(main_~x~0 != main_~K~0); 204#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 205#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2020-11-30 00:53:09,761 INFO L796 eck$LassoCheckResult]: Loop: 206#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 208#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2020-11-30 00:53:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2020-11-30 00:53:09,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:09,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068228254] [2020-11-30 00:53:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:09,768 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:09,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:09,776 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2020-11-30 00:53:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:09,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841127691] [2020-11-30 00:53:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:09,781 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:53:09,790 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:53:09,791 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:53:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2020-11-30 00:53:09,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:53:09,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996615627] [2020-11-30 00:53:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:53:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:09,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996615627] [2020-11-30 00:53:09,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:53:09,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:53:09,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372469206] [2020-11-30 00:53:09,906 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:09,906 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:09,907 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:09,907 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:09,907 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:53:09,907 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:09,907 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:09,907 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:09,907 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2020-11-30 00:53:09,907 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:09,908 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:09,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:09,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:09,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:10,065 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:10,065 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:10,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:53:10,077 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:10,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:53:10,134 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:13,532 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:53:13,535 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:53:13,535 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:53:13,535 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:53:13,535 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:53:13,535 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:53:13,535 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:13,536 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:53:13,536 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:53:13,536 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2020-11-30 00:53:13,536 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:53:13,536 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:53:13,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:13,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:13,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:53:13,706 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:53:13,706 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/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) [2020-11-30 00:53:13,717 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:53:13,719 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:53:13,720 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:53:13,720 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:53:13,720 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-30 00:53:13,720 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:53:13,724 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-30 00:53:13,724 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:13,729 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:53:13,735 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:53:13,735 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_8fbbdab7-fd9f-4b17-a3f0-b6d198700589/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:53:13,755 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:53:13,756 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:53:13,756 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:53:13,756 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = -2*ULTIMATE.start_main_~x~0 + 2*ULTIMATE.start_main_~K~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:53:13,818 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:53:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:53:13,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:13,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:13,919 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 [2020-11-30 00:53:13,919 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-11-30 00:53:13,926 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-11-30 00:53:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-11-30 00:53:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:53:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-11-30 00:53:13,928 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-30 00:53:13,928 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:13,928 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:53:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:53:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:13,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:13,998 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-30 00:53:13,998 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-11-30 00:53:14,008 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-11-30 00:53:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-11-30 00:53:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:53:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-11-30 00:53:14,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-30 00:53:14,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:14,011 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:53:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:53:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:53:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:53:14,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:53:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:53:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:53:14,094 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 2 loop predicates [2020-11-30 00:53:14,094 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-11-30 00:53:14,113 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 8 states and 9 transitions. Complement of second has 4 states. [2020-11-30 00:53:14,115 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 [2020-11-30 00:53:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:53:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-11-30 00:53:14,116 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-30 00:53:14,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:14,116 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2020-11-30 00:53:14,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:14,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-30 00:53:14,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:53:14,118 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-11-30 00:53:14,118 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:53:14,118 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2020-11-30 00:53:14,119 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:53:14,119 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:53:14,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:53:14,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:53:14,119 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:53:14,119 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:53:14,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:53:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:53:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:53:14,120 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2020-11-30 00:53:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:53:14,121 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-30 00:53:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:53:14,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-30 00:53:14,121 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:53:14,121 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:53:14,121 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:53:14,121 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:53:14,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:53:14,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:53:14,122 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:53:14,122 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:53:14,122 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:53:14,122 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-30 00:53:14,122 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:53:14,122 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:53:14,122 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 00:53:14,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 12:53:14 BoogieIcfgContainer [2020-11-30 00:53:14,130 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 00:53:14,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:53:14,130 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:53:14,131 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:53:14,131 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:53:03" (3/4) ... [2020-11-30 00:53:14,134 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 00:53:14,134 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:53:14,135 INFO L168 Benchmark]: Toolchain (without parser) took 11624.86 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 54.7 MB in the beginning and 64.8 MB in the end (delta: -10.2 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:53:14,136 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 73.4 MB. Free memory was 48.1 MB in the beginning and 48.1 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:53:14,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.16 ms. Allocated memory is still 88.1 MB. Free memory was 54.5 MB in the beginning and 66.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:53:14,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.61 ms. Allocated memory is still 88.1 MB. Free memory was 66.8 MB in the beginning and 65.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:53:14,138 INFO L168 Benchmark]: Boogie Preprocessor took 21.87 ms. Allocated memory is still 88.1 MB. Free memory was 65.6 MB in the beginning and 64.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:53:14,139 INFO L168 Benchmark]: RCFGBuilder took 291.28 ms. Allocated memory is still 88.1 MB. Free memory was 64.6 MB in the beginning and 56.7 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:53:14,140 INFO L168 Benchmark]: BuchiAutomizer took 10928.04 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 56.5 MB in the beginning and 64.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:53:14,140 INFO L168 Benchmark]: Witness Printer took 3.78 ms. Allocated memory is still 111.1 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:53:14,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 73.4 MB. Free memory was 48.1 MB in the beginning and 48.1 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.16 ms. Allocated memory is still 88.1 MB. Free memory was 54.5 MB in the beginning and 66.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.61 ms. Allocated memory is still 88.1 MB. Free memory was 66.8 MB in the beginning and 65.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.87 ms. Allocated memory is still 88.1 MB. Free memory was 65.6 MB in the beginning and 64.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 291.28 ms. Allocated memory is still 88.1 MB. Free memory was 64.6 MB in the beginning and 56.7 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 10928.04 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 56.5 MB in the beginning and 64.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.78 ms. Allocated memory is still 111.1 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * K and consists of 4 locations. One deterministic module has affine ranking function x + -1 * K and consists of 3 locations. One deterministic module has affine ranking function 2 * K + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 2 * K + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.8s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 9.7s. Construction of modules took 0.2s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 54ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...