./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF --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 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:43:42,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:43:42,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:43:42,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:43:42,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:43:42,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:43:42,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:43:42,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:43:42,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:43:42,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:43:42,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:43:42,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:43:42,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:43:42,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:43:42,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:43:42,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:43:42,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:43:42,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:43:42,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:43:42,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:43:42,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:43:42,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:43:42,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:43:42,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:43:42,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:43:42,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:43:42,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:43:42,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:43:42,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:43:42,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:43:42,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:43:42,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:43:42,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:43:42,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:43:42,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:43:42,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:43:42,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:43:42,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:43:42,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:43:42,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:43:42,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:43:42,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-20 05:43:42,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:43:42,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:43:42,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:43:42,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:43:42,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:43:42,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:43:42,654 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:43:42,654 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-20 05:43:42,655 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-20 05:43:42,655 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-20 05:43:42,655 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-20 05:43:42,656 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-20 05:43:42,656 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-20 05:43:42,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:43:42,657 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:43:42,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:43:42,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:43:42,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-20 05:43:42,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-20 05:43:42,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-20 05:43:42,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:43:42,659 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-20 05:43:42,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:43:42,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-20 05:43:42,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:43:42,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:43:42,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:43:42,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:43:42,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:43:42,663 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-20 05:43:42,663 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_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca [2021-11-20 05:43:42,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:43:42,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:43:42,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:43:42,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:43:42,992 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:43:42,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2021-11-20 05:43:43,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/data/ceb410748/10c67c6ddfab4ebba455ae4e81b7cd19/FLAGeae2f10f3 [2021-11-20 05:43:43,655 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:43:43,656 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2021-11-20 05:43:43,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/data/ceb410748/10c67c6ddfab4ebba455ae4e81b7cd19/FLAGeae2f10f3 [2021-11-20 05:43:43,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/data/ceb410748/10c67c6ddfab4ebba455ae4e81b7cd19 [2021-11-20 05:43:43,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:43:43,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:43:43,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:43:43,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:43:43,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:43:43,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e1b5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43, skipping insertion in model container [2021-11-20 05:43:43,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:43:43,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:43:43,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:43:43,918 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:43:43,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:43:43,946 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:43:43,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43 WrapperNode [2021-11-20 05:43:43,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:43:43,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:43:43,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:43:43,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:43:43,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,981 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2021-11-20 05:43:43,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:43:43,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:43:43,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:43:43,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:43:43,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:43,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:44,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:44,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:43:44,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:43:44,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:43:44,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:43:44,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (1/1) ... [2021-11-20 05:43:44,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:44,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-20 05:43:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:43:44,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:43:44,143 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:43:44,145 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:43:44,213 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:43:44,220 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:43:44,220 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:43:44,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:44 BoogieIcfgContainer [2021-11-20 05:43:44,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:43:44,224 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-20 05:43:44,224 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-20 05:43:44,228 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-20 05:43:44,229 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 05:43:44,230 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 05:43:43" (1/3) ... [2021-11-20 05:43:44,231 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@72ba32eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 05:43:44, skipping insertion in model container [2021-11-20 05:43:44,231 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 05:43:44,232 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:43" (2/3) ... [2021-11-20 05:43:44,232 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@72ba32eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 05:43:44, skipping insertion in model container [2021-11-20 05:43:44,232 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 05:43:44,233 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:44" (3/3) ... [2021-11-20 05:43:44,234 INFO L388 chiAutomizerObserver]: Analyzing ICFG KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2021-11-20 05:43:44,287 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-20 05:43:44,288 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-20 05:43:44,288 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-20 05:43:44,288 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-20 05:43:44,288 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-20 05:43:44,288 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-20 05:43:44,289 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-20 05:43:44,289 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-20 05:43:44,305 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:44,326 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:44,326 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 05:43:44,326 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 05:43:44,333 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-20 05:43:44,333 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-20 05:43:44,333 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-20 05:43:44,333 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:44,335 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:44,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 05:43:44,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 05:43:44,335 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-20 05:43:44,336 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-20 05:43:44,342 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 10#L23-1true [2021-11-20 05:43:44,343 INFO L793 eck$LassoCheckResult]: Loop: 10#L23-1true assume !!(main_~x~0#1 < 255); 5#L18true assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 8#L18-2true assume 0 != main_~debug~0#1;main_~x~0#1 := 0; 10#L23-1true [2021-11-20 05:43:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-11-20 05:43:44,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660518640] [2021-11-20 05:43:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:44,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,441 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,462 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:44,465 INFO L85 PathProgramCache]: Analyzing trace with hash 40878, now seen corresponding path program 1 times [2021-11-20 05:43:44,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:44,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651277400] [2021-11-20 05:43:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:44,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,490 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,510 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2021-11-20 05:43:44,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:44,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312078230] [2021-11-20 05:43:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:44,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:44,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:43:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312078230] [2021-11-20 05:43:44,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312078230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:44,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:44,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:43:44,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121547780] [2021-11-20 05:43:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:44,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:43:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:43:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:43:44,755 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:44,766 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-11-20 05:43:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:43:44,773 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2021-11-20 05:43:44,774 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:44,778 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2021-11-20 05:43:44,779 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-11-20 05:43:44,779 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-11-20 05:43:44,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2021-11-20 05:43:44,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:43:44,781 INFO L681 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-11-20 05:43:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2021-11-20 05:43:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-11-20 05:43:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2021-11-20 05:43:44,830 INFO L704 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-11-20 05:43:44,830 INFO L587 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2021-11-20 05:43:44,830 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-20 05:43:44,831 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2021-11-20 05:43:44,831 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:44,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 05:43:44,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 05:43:44,832 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-20 05:43:44,832 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-20 05:43:44,833 INFO L791 eck$LassoCheckResult]: Stem: 31#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 32#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 33#L23-1 [2021-11-20 05:43:44,833 INFO L793 eck$LassoCheckResult]: Loop: 33#L23-1 assume !!(main_~x~0#1 < 255); 29#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 30#L18-2 assume !(0 != main_~debug~0#1); 33#L23-1 [2021-11-20 05:43:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-11-20 05:43:44,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112972020] [2021-11-20 05:43:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:44,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,840 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,844 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2021-11-20 05:43:44,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942251057] [2021-11-20 05:43:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:44,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,857 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,869 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2021-11-20 05:43:44,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173574512] [2021-11-20 05:43:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:44,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,882 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:44,894 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:44,947 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 05:43:44,948 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 05:43:44,948 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 05:43:44,948 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 05:43:44,949 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 05:43:44,949 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:44,949 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 05:43:44,949 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 05:43:44,950 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2021-11-20 05:43:44,950 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 05:43:44,950 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 05:43:44,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:44,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:45,068 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 05:43:45,069 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 05:43:45,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:45,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:45,083 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 05:43:45,083 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:45,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-20 05:43:45,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:45,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:45,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:45,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 05:43:45,193 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:45,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-20 05:43:45,273 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 05:43:45,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:45,281 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 05:43:45,281 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 05:43:45,281 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 05:43:45,282 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 05:43:45,282 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 05:43:45,282 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:45,282 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 05:43:45,282 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 05:43:45,283 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2021-11-20 05:43:45,283 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 05:43:45,283 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 05:43:45,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:45,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:45,397 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 05:43:45,403 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 05:43:45,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:45,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:45,414 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 05:43:45,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 05:43:45,429 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 05:43:45,429 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 05:43:45,430 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 05:43:45,430 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 05:43:45,435 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 05:43:45,435 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 05:43:45,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-20 05:43:45,453 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 05:43:45,459 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-20 05:43:45,459 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-20 05:43:45,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:45,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:45,489 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 05:43:45,489 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 05:43:45,490 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 05:43:45,491 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2021-11-20 05:43:45,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-20 05:43:45,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:45,538 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 05:43:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:43:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:45,740 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-20 05:43:45,742 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:45,788 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 15 transitions. Complement of second has 7 states. [2021-11-20 05:43:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-20 05:43:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2021-11-20 05:43:45,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 3 letters. [2021-11-20 05:43:45,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:45,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 3 letters. [2021-11-20 05:43:45,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:45,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 6 letters. [2021-11-20 05:43:45,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:45,797 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2021-11-20 05:43:45,800 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:45,802 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 15 transitions. [2021-11-20 05:43:45,802 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-11-20 05:43:45,803 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-11-20 05:43:45,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2021-11-20 05:43:45,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 05:43:45,804 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-20 05:43:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2021-11-20 05:43:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-20 05:43:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-20 05:43:45,809 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-20 05:43:45,809 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-20 05:43:45,809 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-20 05:43:45,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2021-11-20 05:43:45,811 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:45,811 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 05:43:45,811 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 05:43:45,813 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-20 05:43:45,813 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-20 05:43:45,817 INFO L791 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 91#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 95#L23-1 assume !!(main_~x~0#1 < 255); 86#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 87#L18-2 [2021-11-20 05:43:45,817 INFO L793 eck$LassoCheckResult]: Loop: 87#L18-2 assume !(0 != main_~debug~0#1); 92#L23-1 assume !!(main_~x~0#1 < 255); 96#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 87#L18-2 [2021-11-20 05:43:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-11-20 05:43:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:45,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318835963] [2021-11-20 05:43:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:45,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:45,830 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:45,839 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2021-11-20 05:43:45,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:45,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069380309] [2021-11-20 05:43:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:45,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:45,849 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:45,857 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2021-11-20 05:43:45,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:45,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790022929] [2021-11-20 05:43:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:45,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:45,876 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:45,888 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:45,946 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 05:43:45,946 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 05:43:45,947 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 05:43:45,947 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 05:43:45,947 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 05:43:45,947 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:45,948 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 05:43:45,948 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 05:43:45,948 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2021-11-20 05:43:45,948 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 05:43:45,948 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 05:43:45,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:45,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:46,051 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 05:43:46,051 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 05:43:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-20 05:43:46,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 05:43:46,065 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:46,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-11-20 05:43:46,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,148 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 05:43:46,148 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:46,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-20 05:43:46,227 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 05:43:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:46,232 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 05:43:46,232 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 05:43:46,232 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 05:43:46,233 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 05:43:46,233 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 05:43:46,233 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,233 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 05:43:46,233 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 05:43:46,233 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2021-11-20 05:43:46,233 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 05:43:46,233 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 05:43:46,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:46,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:46,321 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 05:43:46,321 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 05:43:46,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-20 05:43:46,330 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 05:43:46,341 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 05:43:46,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 05:43:46,342 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 05:43:46,342 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 05:43:46,342 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 05:43:46,345 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 05:43:46,345 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 05:43:46,356 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 05:43:46,359 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-20 05:43:46,360 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-20 05:43:46,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,361 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-20 05:43:46,371 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 05:43:46,371 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 05:43:46,372 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 05:43:46,372 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2021-11-20 05:43:46,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:46,409 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 05:43:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:46,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:43:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:46,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:46,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:46,554 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 [2021-11-20 05:43:46,555 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:46,575 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 17 states and 22 transitions. Complement of second has 7 states. [2021-11-20 05:43:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-20 05:43:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-11-20 05:43:46,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 3 letters. [2021-11-20 05:43:46,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:46,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-20 05:43:46,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:46,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 6 letters. [2021-11-20 05:43:46,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:46,583 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 22 transitions. [2021-11-20 05:43:46,585 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:46,587 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 22 transitions. [2021-11-20 05:43:46,588 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-11-20 05:43:46,590 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-11-20 05:43:46,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 22 transitions. [2021-11-20 05:43:46,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 05:43:46,591 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-20 05:43:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 22 transitions. [2021-11-20 05:43:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 05:43:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-20 05:43:46,598 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-20 05:43:46,598 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-20 05:43:46,604 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-20 05:43:46,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 22 transitions. [2021-11-20 05:43:46,605 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-20 05:43:46,605 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 05:43:46,605 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 05:43:46,606 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2021-11-20 05:43:46,606 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-20 05:43:46,606 INFO L791 eck$LassoCheckResult]: Stem: 163#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 164#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 169#L23-1 assume !!(main_~x~0#1 < 255); 173#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 165#L18-2 assume !(0 != main_~debug~0#1); 166#L23-1 assume !!(main_~x~0#1 < 255); 159#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 160#L18-2 [2021-11-20 05:43:46,606 INFO L793 eck$LassoCheckResult]: Loop: 160#L18-2 assume !(0 != main_~debug~0#1); 172#L23-1 assume !!(main_~x~0#1 < 255); 171#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 160#L18-2 [2021-11-20 05:43:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2021-11-20 05:43:46,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:46,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198663052] [2021-11-20 05:43:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:46,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:46,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:46,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:43:46,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198663052] [2021-11-20 05:43:46,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198663052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:46,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:46,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:43:46,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458719637] [2021-11-20 05:43:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:46,671 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-20 05:43:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2021-11-20 05:43:46,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:46,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570718359] [2021-11-20 05:43:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:46,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:46,678 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:43:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:43:46,684 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:43:46,713 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 05:43:46,713 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 05:43:46,713 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 05:43:46,714 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 05:43:46,714 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 05:43:46,714 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,714 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 05:43:46,714 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 05:43:46,714 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2021-11-20 05:43:46,714 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 05:43:46,714 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 05:43:46,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:46,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:46,787 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 05:43:46,787 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 05:43:46,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,798 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 05:43:46,798 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:46,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-20 05:43:46,824 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-20 05:43:46,824 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~debug~0#1=0} Honda state: {ULTIMATE.start_main_~debug~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-20 05:43:46,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-11-20 05:43:46,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-20 05:43:46,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 05:43:46,871 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:46,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:46,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:46,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:46,963 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 05:43:46,963 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 05:43:46,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-20 05:43:47,012 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 05:43:47,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:47,015 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 05:43:47,015 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 05:43:47,016 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 05:43:47,016 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 05:43:47,016 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 05:43:47,016 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:47,016 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 05:43:47,016 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 05:43:47,016 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2021-11-20 05:43:47,016 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 05:43:47,016 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 05:43:47,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:47,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 05:43:47,106 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 05:43:47,106 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 05:43:47,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:47,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:47,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:47,120 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 05:43:47,131 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 05:43:47,131 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 05:43:47,131 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 05:43:47,131 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 05:43:47,131 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 05:43:47,132 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 05:43:47,132 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 05:43:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-20 05:43:47,151 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 05:43:47,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:47,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:47,199 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:47,212 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 05:43:47,223 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 05:43:47,223 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 05:43:47,223 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 05:43:47,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 05:43:47,223 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 05:43:47,226 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 05:43:47,226 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 05:43:47,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-20 05:43:47,243 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 05:43:47,246 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-20 05:43:47,246 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-20 05:43:47,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 05:43:47,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:47,248 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 05:43:47,256 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 05:43:47,256 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 05:43:47,256 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 05:43:47,256 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2021-11-20 05:43:47,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-20 05:43:47,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:47,303 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 05:43:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:43:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:47,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:47,384 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 [2021-11-20 05:43:47,384 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,403 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2021-11-20 05:43:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-20 05:43:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-11-20 05:43:47,406 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-20 05:43:47,407 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:47,407 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-20 05:43:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:43:47,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:47,510 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 [2021-11-20 05:43:47,510 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,528 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2021-11-20 05:43:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-20 05:43:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-11-20 05:43:47,532 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-20 05:43:47,532 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:47,533 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-20 05:43:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:47,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:43:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:43:47,643 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 [2021-11-20 05:43:47,643 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,662 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 32 transitions. Complement of second has 6 states. [2021-11-20 05:43:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-20 05:43:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-11-20 05:43:47,665 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-20 05:43:47,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:47,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2021-11-20 05:43:47,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:47,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2021-11-20 05:43:47,667 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 05:43:47,667 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 32 transitions. [2021-11-20 05:43:47,669 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-11-20 05:43:47,670 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 20 states and 26 transitions. [2021-11-20 05:43:47,670 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-11-20 05:43:47,670 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-11-20 05:43:47,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-11-20 05:43:47,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 05:43:47,671 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-20 05:43:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-11-20 05:43:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 9. [2021-11-20 05:43:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2021-11-20 05:43:47,673 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-11-20 05:43:47,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:43:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:43:47,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:43:47,674 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:47,691 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-11-20 05:43:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:43:47,694 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-11-20 05:43:47,697 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-20 05:43:47,697 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 0 states and 0 transitions. [2021-11-20 05:43:47,697 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-11-20 05:43:47,697 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-11-20 05:43:47,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-11-20 05:43:47,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:43:47,698 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 05:43:47,698 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 05:43:47,698 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 05:43:47,698 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-20 05:43:47,698 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-11-20 05:43:47,699 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-20 05:43:47,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-11-20 05:43:47,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 05:43:47 BoogieIcfgContainer [2021-11-20 05:43:47,712 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-20 05:43:47,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 05:43:47,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 05:43:47,716 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 05:43:47,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:44" (3/4) ... [2021-11-20 05:43:47,721 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 05:43:47,721 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 05:43:47,724 INFO L158 Benchmark]: Toolchain (without parser) took 4041.88ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 74.1MB in the beginning and 72.5MB in the end (delta: 1.5MB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. [2021-11-20 05:43:47,724 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory was 59.9MB in the beginning and 59.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:43:47,725 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.64ms. Allocated memory is still 104.9MB. Free memory was 73.8MB in the beginning and 81.3MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:43:47,726 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.80ms. Allocated memory is still 104.9MB. Free memory was 81.3MB in the beginning and 80.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:43:47,726 INFO L158 Benchmark]: Boogie Preprocessor took 19.43ms. Allocated memory is still 104.9MB. Free memory was 80.0MB in the beginning and 78.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:43:47,735 INFO L158 Benchmark]: RCFGBuilder took 220.34ms. Allocated memory is still 104.9MB. Free memory was 78.8MB in the beginning and 70.8MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:43:47,736 INFO L158 Benchmark]: BuchiAutomizer took 3488.26ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 70.8MB in the beginning and 73.3MB in the end (delta: -2.5MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-20 05:43:47,736 INFO L158 Benchmark]: Witness Printer took 5.60ms. Allocated memory is still 138.4MB. Free memory was 73.3MB in the beginning and 72.5MB in the end (delta: 800.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:43:47,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory was 59.9MB in the beginning and 59.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.64ms. Allocated memory is still 104.9MB. Free memory was 73.8MB in the beginning and 81.3MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.80ms. Allocated memory is still 104.9MB. Free memory was 81.3MB in the beginning and 80.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.43ms. Allocated memory is still 104.9MB. Free memory was 80.0MB in the beginning and 78.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 220.34ms. Allocated memory is still 104.9MB. Free memory was 78.8MB in the beginning and 70.8MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 3488.26ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 70.8MB in the beginning and 73.3MB in the end (delta: -2.5MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. * Witness Printer took 5.60ms. Allocated memory is still 138.4MB. Free memory was 73.3MB in the beginning and 72.5MB in the end (delta: 800.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One nondeterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 17 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 57 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 46 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc1 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp83 ukn100 mio100 lsp100 div346 bol100 ite100 ukn100 eq150 hnf48 smp92 dnf100 smp100 tf105 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 86ms VariablesStem: 0 VariablesLoop: 4 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-11-20 05:43:47,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:47,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6ac065-3713-43ed-9d56-438cf8a354f5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE