./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-bwb/xor-01-false.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_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/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_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-bwb/xor-01-false.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/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_33c6e661-426a-4faf-9699-7c77a935324b/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 74f1b7d9dfa6854874ce70d8fff6b417fc901234b3ffce0c6d2478bde7882f9e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:14:42,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:14:42,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:14:42,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:14:42,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:14:42,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:14:42,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:14:42,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:14:42,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:14:42,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:14:42,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:14:42,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:14:42,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:14:42,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:14:42,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:14:42,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:14:42,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:14:42,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:14:42,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:14:42,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:14:42,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:14:42,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:14:42,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:14:42,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:14:42,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:14:42,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:14:42,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:14:42,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:14:42,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:14:42,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:14:42,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:14:42,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:14:42,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:14:42,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:14:42,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:14:42,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:14:42,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:14:42,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:14:42,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:14:42,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:14:42,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:14:42,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-20 06:14:42,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:14:42,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:14:42,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:14:42,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:14:42,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:14:42,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:14:42,680 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:14:42,681 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-20 06:14:42,681 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-20 06:14:42,681 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-20 06:14:42,683 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-20 06:14:42,683 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-20 06:14:42,684 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-20 06:14:42,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:14:42,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:14:42,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:14:42,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:14:42,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-20 06:14:42,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-20 06:14:42,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-20 06:14:42,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:14:42,687 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-20 06:14:42,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:14:42,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-20 06:14:42,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:14:42,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:14:42,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:14:42,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:14:42,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:14:42,693 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-20 06:14:42,694 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_33c6e661-426a-4faf-9699-7c77a935324b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74f1b7d9dfa6854874ce70d8fff6b417fc901234b3ffce0c6d2478bde7882f9e [2021-11-20 06:14:43,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:14:43,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:14:43,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:14:43,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:14:43,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:14:43,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/termination-bwb/xor-01-false.c [2021-11-20 06:14:43,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/data/91d73ea82/d8243818c0f5489aa5561bb5b7c02125/FLAG082bed2c2 [2021-11-20 06:14:43,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:14:43,714 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/sv-benchmarks/c/termination-bwb/xor-01-false.c [2021-11-20 06:14:43,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/data/91d73ea82/d8243818c0f5489aa5561bb5b7c02125/FLAG082bed2c2 [2021-11-20 06:14:44,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/data/91d73ea82/d8243818c0f5489aa5561bb5b7c02125 [2021-11-20 06:14:44,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:14:44,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:14:44,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:14:44,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:14:44,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:14:44,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e58f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44, skipping insertion in model container [2021-11-20 06:14:44,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:14:44,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:14:44,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:14:44,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:14:44,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:14:44,379 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:14:44,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44 WrapperNode [2021-11-20 06:14:44,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:14:44,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:14:44,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:14:44,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:14:44,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,421 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-11-20 06:14:44,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:14:44,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:14:44,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:14:44,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:14:44,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:14:44,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:14:44,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:14:44,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:14:44,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (1/1) ... [2021-11-20 06:14:44,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:44,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:44,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-20 06:14:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:14:44,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:14:44,637 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:14:44,639 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:14:44,724 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:14:44,732 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:14:44,733 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:14:44,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:44 BoogieIcfgContainer [2021-11-20 06:14:44,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:14:44,736 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-20 06:14:44,736 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-20 06:14:44,739 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-20 06:14:44,740 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 06:14:44,740 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 06:14:44" (1/3) ... [2021-11-20 06:14:44,741 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@334f0f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 06:14:44, skipping insertion in model container [2021-11-20 06:14:44,741 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 06:14:44,741 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:44" (2/3) ... [2021-11-20 06:14:44,742 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@334f0f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 06:14:44, skipping insertion in model container [2021-11-20 06:14:44,742 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 06:14:44,742 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:44" (3/3) ... [2021-11-20 06:14:44,744 INFO L388 chiAutomizerObserver]: Analyzing ICFG xor-01-false.c [2021-11-20 06:14:44,802 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-20 06:14:44,803 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-20 06:14:44,803 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-20 06:14:44,803 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-20 06:14:44,803 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-20 06:14:44,803 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-20 06:14:44,804 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-20 06:14:44,804 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-20 06:14:44,821 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 06:14:44,858 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-20 06:14:44,859 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 06:14:44,859 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 06:14:44,866 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-20 06:14:44,866 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-20 06:14:44,866 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-20 06:14:44,866 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 06:14:44,868 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-20 06:14:44,869 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 06:14:44,869 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 06:14:44,869 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-20 06:14:44,869 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-20 06:14:44,878 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~nondet1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 7#L18-2true [2021-11-20 06:14:44,878 INFO L793 eck$LassoCheckResult]: Loop: 7#L18-2true assume !!(main_~x~0#1 > 0); 5#L18true assume !(main_~a~0#1 >= 0);main_~x~0#1 := main_~x~0#1 - 1;main_~a~0#1 := 1; 7#L18-2true [2021-11-20 06:14:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-11-20 06:14:44,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:44,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190418939] [2021-11-20 06:14:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:44,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:45,009 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:45,045 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 1 times [2021-11-20 06:14:45,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:45,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279247839] [2021-11-20 06:14:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:45,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:45,086 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:45,097 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 925800, now seen corresponding path program 1 times [2021-11-20 06:14:45,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:45,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821413098] [2021-11-20 06:14:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:45,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:45,117 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:45,124 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:45,211 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 06:14:45,212 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 06:14:45,212 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 06:14:45,212 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 06:14:45,212 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 06:14:45,212 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:45,213 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 06:14:45,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 06:14:45,213 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration1_Loop [2021-11-20 06:14:45,213 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 06:14:45,214 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 06:14:45,240 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 06:14:45,270 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 06:14:45,372 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 06:14:45,373 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 06:14:45,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:45,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:45,385 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 06:14:45,385 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 06:14:45,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-20 06:14:45,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:45,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:45,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:45,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:45,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-20 06:14:45,464 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 06:14:45,464 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 06:14:45,532 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 06:14:45,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:45,539 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 06:14:45,539 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 06:14:45,539 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 06:14:45,539 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 06:14:45,540 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 06:14:45,540 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:45,540 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 06:14:45,540 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 06:14:45,540 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration1_Loop [2021-11-20 06:14:45,540 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 06:14:45,540 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 06:14:45,546 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 06:14:45,555 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 06:14:45,626 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 06:14:45,630 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 06:14:45,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:45,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:45,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:45,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-20 06:14:45,638 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 06:14:45,648 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 06:14:45,648 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 06:14:45,649 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 06:14:45,649 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 06:14:45,649 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 06:14:45,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 06:14:45,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 06:14:45,657 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 06:14:45,663 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-20 06:14:45,663 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-20 06:14:45,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:45,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:45,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-20 06:14:45,703 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 06:14:45,703 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 06:14:45,704 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 06:14:45,704 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~a~0#1) = -1*ULTIMATE.start_main_~a~0#1 Supporting invariants [] [2021-11-20 06:14:45,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:45,739 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 06:14:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:14:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:45,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:45,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:14:45,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:45,867 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 06:14:45,932 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-11-20 06:14:45,934 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 06:14:45,989 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 31 transitions. Complement of second has 6 states. [2021-11-20 06:14:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-20 06:14:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 06:14:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2021-11-20 06:14:45,999 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 2 letters. Loop has 2 letters. [2021-11-20 06:14:46,000 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:46,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 4 letters. Loop has 2 letters. [2021-11-20 06:14:46,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:46,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 2 letters. Loop has 4 letters. [2021-11-20 06:14:46,002 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:46,003 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2021-11-20 06:14:46,010 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-20 06:14:46,015 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 8 states and 11 transitions. [2021-11-20 06:14:46,016 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-11-20 06:14:46,016 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-11-20 06:14:46,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2021-11-20 06:14:46,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 06:14:46,018 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-20 06:14:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2021-11-20 06:14:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-20 06:14:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 06:14:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-11-20 06:14:46,047 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-20 06:14:46,047 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-20 06:14:46,047 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-20 06:14:46,047 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-11-20 06:14:46,049 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-20 06:14:46,049 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 06:14:46,049 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 06:14:46,051 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-20 06:14:46,051 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-20 06:14:46,051 INFO L791 eck$LassoCheckResult]: Stem: 72#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 73#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 75#L18-2 assume !!(main_~x~0#1 > 0); 68#L18 assume main_~a~0#1 >= 0;main_~a~0#1 := ~bitwiseXor(0, 1);main_~x~0#1 := main_~x~0#1 + main_~a~0#1; 69#L18-2 [2021-11-20 06:14:46,051 INFO L793 eck$LassoCheckResult]: Loop: 69#L18-2 assume !!(main_~x~0#1 > 0); 74#L18 assume !(main_~a~0#1 >= 0);main_~x~0#1 := main_~x~0#1 - 1;main_~a~0#1 := 1; 69#L18-2 [2021-11-20 06:14:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-11-20 06:14:46,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717570739] [2021-11-20 06:14:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:46,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,065 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,082 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 2 times [2021-11-20 06:14:46,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:46,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183275234] [2021-11-20 06:14:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:46,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,095 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,105 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 889692235, now seen corresponding path program 1 times [2021-11-20 06:14:46,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:46,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109070024] [2021-11-20 06:14:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:46,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,119 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,137 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:46,190 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 06:14:46,190 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 06:14:46,190 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 06:14:46,191 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 06:14:46,191 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 06:14:46,191 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,191 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 06:14:46,191 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 06:14:46,192 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration2_Loop [2021-11-20 06:14:46,192 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 06:14:46,192 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 06:14:46,194 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 06:14:46,204 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 06:14:46,251 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 06:14:46,251 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 06:14:46,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:46,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:46,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 06:14:46,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 06:14:46,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-20 06:14:46,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:46,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:46,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-20 06:14:46,332 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 06:14:46,332 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 06:14:46,374 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 06:14:46,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:46,381 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 06:14:46,381 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 06:14:46,382 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 06:14:46,382 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 06:14:46,382 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 06:14:46,382 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,382 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 06:14:46,382 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 06:14:46,382 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration2_Loop [2021-11-20 06:14:46,382 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 06:14:46,382 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 06:14:46,383 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 06:14:46,399 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 06:14:46,466 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 06:14:46,466 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 06:14:46,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:46,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:46,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-20 06:14:46,474 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 06:14:46,486 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 06:14:46,486 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 06:14:46,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 06:14:46,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 06:14:46,487 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 06:14:46,491 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 06:14:46,491 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 06:14:46,517 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 06:14:46,521 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-20 06:14:46,521 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-20 06:14:46,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:46,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:46,535 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 06:14:46,535 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 06:14:46,535 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 06:14:46,535 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~a~0#1) = -1*ULTIMATE.start_main_~a~0#1 Supporting invariants [] [2021-11-20 06:14:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-20 06:14:46,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:46,576 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 06:14:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:14:46,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:46,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:14:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:46,642 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 06:14:46,643 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-11-20 06:14:46,643 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 06:14:46,652 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) Result 12 states and 17 transitions. Complement of second has 5 states. [2021-11-20 06:14:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-20 06:14:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 06:14:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-11-20 06:14:46,654 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2021-11-20 06:14:46,655 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:46,655 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-20 06:14:46,655 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:46,655 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2021-11-20 06:14:46,656 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:46,656 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 17 transitions. [2021-11-20 06:14:46,657 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-20 06:14:46,657 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 17 transitions. [2021-11-20 06:14:46,658 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-11-20 06:14:46,658 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-11-20 06:14:46,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 17 transitions. [2021-11-20 06:14:46,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 06:14:46,658 INFO L681 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-11-20 06:14:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 17 transitions. [2021-11-20 06:14:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-20 06:14:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 06:14:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-11-20 06:14:46,661 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-11-20 06:14:46,661 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-11-20 06:14:46,661 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-20 06:14:46,661 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 17 transitions. [2021-11-20 06:14:46,662 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-20 06:14:46,662 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 06:14:46,662 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 06:14:46,663 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1] [2021-11-20 06:14:46,663 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-20 06:14:46,663 INFO L791 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 131#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 134#L18-2 assume !!(main_~x~0#1 > 0); 126#L18 assume main_~a~0#1 >= 0;main_~a~0#1 := ~bitwiseXor(0, 1);main_~x~0#1 := main_~x~0#1 + main_~a~0#1; 127#L18-2 assume !!(main_~x~0#1 > 0); 135#L18 assume main_~a~0#1 >= 0;main_~a~0#1 := ~bitwiseXor(0, 1);main_~x~0#1 := main_~x~0#1 + main_~a~0#1; 132#L18-2 [2021-11-20 06:14:46,663 INFO L793 eck$LassoCheckResult]: Loop: 132#L18-2 assume !!(main_~x~0#1 > 0); 133#L18 assume !(main_~a~0#1 >= 0);main_~x~0#1 := main_~x~0#1 - 1;main_~a~0#1 := 1; 132#L18-2 [2021-11-20 06:14:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 889692233, now seen corresponding path program 2 times [2021-11-20 06:14:46,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960326069] [2021-11-20 06:14:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:46,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,670 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,677 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 3 times [2021-11-20 06:14:46,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:46,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49650855] [2021-11-20 06:14:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:46,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,682 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,686 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 295744366, now seen corresponding path program 2 times [2021-11-20 06:14:46,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:46,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577230517] [2021-11-20 06:14:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:46,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,695 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:46,703 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:46,730 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 06:14:46,730 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 06:14:46,730 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 06:14:46,730 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 06:14:46,730 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 06:14:46,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 06:14:46,731 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 06:14:46,731 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration3_Loop [2021-11-20 06:14:46,731 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 06:14:46,731 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 06:14:46,732 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 06:14:46,738 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 06:14:46,768 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 06:14:46,768 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 06:14:46,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:46,770 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:46,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-20 06:14:46,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 06:14:46,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 06:14:46,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:46,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:46,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:46,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-20 06:14:46,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 06:14:46,906 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 06:14:46,952 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 06:14:46,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:46,955 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 06:14:46,955 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 06:14:46,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 06:14:46,955 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 06:14:46,955 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 06:14:46,956 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:46,956 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 06:14:46,956 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 06:14:46,956 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration3_Loop [2021-11-20 06:14:46,956 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 06:14:46,956 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 06:14:46,957 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 06:14:46,966 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 06:14:47,001 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 06:14:47,002 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 06:14:47,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:47,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:47,011 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 06:14:47,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-20 06:14:47,022 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 06:14:47,022 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 06:14:47,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 06:14:47,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 06:14:47,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 06:14:47,024 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 06:14:47,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 06:14:47,041 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 06:14:47,046 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-20 06:14:47,046 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-20 06:14:47,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 06:14:47,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:47,051 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:47,053 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 06:14:47,053 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 06:14:47,053 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 06:14:47,053 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = 1*ULTIMATE.start_main_~x~0#1 Supporting invariants [] [2021-11-20 06:14:47,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-20 06:14:47,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:47,095 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 06:14:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:14:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:47,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:14:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:47,191 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 06:14:47,192 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 06:14:47,192 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8 Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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 06:14:47,215 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) Result 14 states and 21 transitions. Complement of second has 5 states. [2021-11-20 06:14:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-20 06:14:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) 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 06:14:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-11-20 06:14:47,218 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-20 06:14:47,218 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:47,218 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-20 06:14:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:14:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:47,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:14:47,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:47,313 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 06:14:47,313 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 06:14:47,314 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8 Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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 06:14:47,328 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) Result 14 states and 21 transitions. Complement of second has 5 states. [2021-11-20 06:14:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-20 06:14:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) 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 06:14:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-11-20 06:14:47,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-20 06:14:47,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:47,332 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-20 06:14:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:14:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:47,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:14:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:47,446 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 06:14:47,447 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 06:14:47,448 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8 Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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 06:14:47,486 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) Result 16 states and 24 transitions. Complement of second has 4 states. [2021-11-20 06:14:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-20 06:14:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) 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 06:14:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-20 06:14:47,488 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-20 06:14:47,489 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:47,489 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-20 06:14:47,489 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:47,490 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2021-11-20 06:14:47,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 06:14:47,490 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 24 transitions. [2021-11-20 06:14:47,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-20 06:14:47,492 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 14 states and 20 transitions. [2021-11-20 06:14:47,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-11-20 06:14:47,493 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-11-20 06:14:47,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2021-11-20 06:14:47,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 06:14:47,493 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-11-20 06:14:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2021-11-20 06:14:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 6. [2021-11-20 06:14:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 06:14:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2021-11-20 06:14:47,495 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-11-20 06:14:47,495 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-11-20 06:14:47,495 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-20 06:14:47,496 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2021-11-20 06:14:47,496 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-20 06:14:47,501 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 06:14:47,502 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 06:14:47,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:47,506 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-20 06:14:47,508 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-20 06:14:47,508 INFO L791 eck$LassoCheckResult]: Stem: 290#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 291#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 287#L18-2 [2021-11-20 06:14:47,508 INFO L793 eck$LassoCheckResult]: Loop: 287#L18-2 assume !!(main_~x~0#1 > 0); 286#L18 assume main_~a~0#1 >= 0;main_~a~0#1 := ~bitwiseXor(0, 1);main_~x~0#1 := main_~x~0#1 + main_~a~0#1; 287#L18-2 [2021-11-20 06:14:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-11-20 06:14:47,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504046439] [2021-11-20 06:14:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:47,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:47,523 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:47,527 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 1 times [2021-11-20 06:14:47,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007010767] [2021-11-20 06:14:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:47,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:47,539 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:47,558 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 3 times [2021-11-20 06:14:47,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858495152] [2021-11-20 06:14:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:47,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:47,564 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:14:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:14:47,567 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:14:47,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:47,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 06:14:47 BoogieIcfgContainer [2021-11-20 06:14:47,635 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-20 06:14:47,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:14:47,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:14:47,636 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:14:47,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:44" (3/4) ... [2021-11-20 06:14:47,640 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:14:47,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:14:47,641 INFO L158 Benchmark]: Toolchain (without parser) took 3544.35ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 70.4MB in the beginning and 98.7MB in the end (delta: -28.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:47,642 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 100.7MB. Free memory is still 55.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:47,642 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.67ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 70.2MB in the beginning and 105.2MB in the end (delta: -35.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:14:47,643 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.85ms. Allocated memory is still 130.0MB. Free memory was 105.2MB in the beginning and 104.2MB in the end (delta: 953.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:47,643 INFO L158 Benchmark]: Boogie Preprocessor took 33.01ms. Allocated memory is still 130.0MB. Free memory was 104.2MB in the beginning and 103.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:14:47,644 INFO L158 Benchmark]: RCFGBuilder took 277.92ms. Allocated memory is still 130.0MB. Free memory was 103.1MB in the beginning and 95.2MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:14:47,644 INFO L158 Benchmark]: BuchiAutomizer took 2899.75ms. Allocated memory is still 130.0MB. Free memory was 95.2MB in the beginning and 98.7MB in the end (delta: -3.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:47,645 INFO L158 Benchmark]: Witness Printer took 4.22ms. Allocated memory is still 130.0MB. Free memory is still 98.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:14:47,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 100.7MB. Free memory is still 55.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.67ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 70.2MB in the beginning and 105.2MB in the end (delta: -35.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.85ms. Allocated memory is still 130.0MB. Free memory was 105.2MB in the beginning and 104.2MB in the end (delta: 953.4kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.01ms. Allocated memory is still 130.0MB. Free memory was 104.2MB in the beginning and 103.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 277.92ms. Allocated memory is still 130.0MB. Free memory was 103.1MB in the beginning and 95.2MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 2899.75ms. Allocated memory is still 130.0MB. Free memory was 95.2MB in the beginning and 98.7MB in the end (delta: -3.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.22ms. Allocated memory is still 130.0MB. Free memory is still 98.7MB. 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 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic) and one module whose termination is unknown.One deterministic module has affine ranking function -1 * a and consists of 4 locations. One deterministic module has affine ranking function -1 * a and consists of 3 locations. One nondeterministic module has affine ranking function x and consists of 3 locations. The remainder module has 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.8s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 1.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 12 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26 IncrementalHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 28 mSDtfsCounter, 26 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 73ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Unable to decide termination Buchi Automizer cannot decide termination for the following lasso because it contains the following overapproximations. Overapproximations C: 0^1 [20] (Reason bitwiseXor) Lasso Stem: "assume { :begin_inline_ULTIMATE.init } true;" "assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0;" Loop: "assume !!(main_~x~0#1 > 0);" "assume main_~a~0#1 >= 0;main_~a~0#1 := ~bitwiseXor(0, 1);main_~x~0#1 := main_~x~0#1 + main_~a~0#1;" RESULT: Ultimate could not prove your program: unable to determine termination [2021-11-20 06:14:47,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/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 Using bit-precise analysis No suitable file found in config dir /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c6e661-426a-4faf-9699-7c77a935324b/bin/uautomizer-DQz5hQGWxF/config using search string *Termination*64bit*_Bitvector*.epf No suitable settings file found using Termination*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN