./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:31:59,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:31:59,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:31:59,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:31:59,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:31:59,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:31:59,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:31:59,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:31:59,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:31:59,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:31:59,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:31:59,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:31:59,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:31:59,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:31:59,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:31:59,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:31:59,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:31:59,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:31:59,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:31:59,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:31:59,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:31:59,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:31:59,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:31:59,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:31:59,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:31:59,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:31:59,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:31:59,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:31:59,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:31:59,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:31:59,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:31:59,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:31:59,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:31:59,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:31:59,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:31:59,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:31:59,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:31:59,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:31:59,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:31:59,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:31:59,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:31:59,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-16 12:31:59,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:31:59,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:31:59,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:31:59,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:31:59,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:31:59,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:31:59,449 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:31:59,450 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-16 12:31:59,450 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-16 12:31:59,450 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-16 12:31:59,451 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-16 12:31:59,452 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-16 12:31:59,452 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-16 12:31:59,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:31:59,452 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:31:59,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:31:59,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:31:59,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-16 12:31:59,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-16 12:31:59,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-16 12:31:59,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:31:59,454 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-16 12:31:59,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:31:59,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-16 12:31:59,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:31:59,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:31:59,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:31:59,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:31:59,457 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-16 12:31:59,457 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_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f57a241e2c58801cabb7fcf6419a1ee8415c4d2687e9efe6a7f86e17b88f5ca [2022-11-16 12:31:59,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:31:59,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:31:59,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:31:59,807 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:31:59,808 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:31:59,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2022-11-16 12:31:59,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/data/f3c178a30/7024a8972c364ee585a6c5879c1036b1/FLAGb0f23a5d2 [2022-11-16 12:32:00,300 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:32:00,301 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/sv-benchmarks/c/termination-crafted-lit/KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2022-11-16 12:32:00,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/data/f3c178a30/7024a8972c364ee585a6c5879c1036b1/FLAGb0f23a5d2 [2022-11-16 12:32:00,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/data/f3c178a30/7024a8972c364ee585a6c5879c1036b1 [2022-11-16 12:32:00,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:32:00,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:32:00,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:32:00,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:32:00,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:32:00,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:00,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2954f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00, skipping insertion in model container [2022-11-16 12:32:00,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:00,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:32:00,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:32:00,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:32:00,940 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:32:00,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:32:00,970 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:32:00,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00 WrapperNode [2022-11-16 12:32:00,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:32:00,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:32:00,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:32:00,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:32:00,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:00,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,007 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-11-16 12:32:01,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:32:01,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:32:01,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:32:01,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:32:01,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:32:01,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:32:01,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:32:01,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:32:01,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (1/1) ... [2022-11-16 12:32:01,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:01,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:01,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-16 12:32:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:32:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:32:01,188 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:32:01,191 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:32:01,308 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:32:01,318 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:32:01,318 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:32:01,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:32:01 BoogieIcfgContainer [2022-11-16 12:32:01,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:32:01,322 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-16 12:32:01,322 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-16 12:32:01,327 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-16 12:32:01,328 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:32:01,328 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.11 12:32:00" (1/3) ... [2022-11-16 12:32:01,329 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2266452f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.11 12:32:01, skipping insertion in model container [2022-11-16 12:32:01,330 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:32:01,330 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:32:00" (2/3) ... [2022-11-16 12:32:01,330 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2266452f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.11 12:32:01, skipping insertion in model container [2022-11-16 12:32:01,331 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:32:01,331 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:32:01" (3/3) ... [2022-11-16 12:32:01,333 INFO L332 chiAutomizerObserver]: Analyzing ICFG KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c [2022-11-16 12:32:01,406 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-16 12:32:01,407 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-16 12:32:01,407 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-16 12:32:01,407 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-16 12:32:01,407 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-16 12:32:01,407 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-16 12:32:01,408 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-16 12:32:01,408 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-16 12:32:01,413 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:01,440 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:01,440 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:32:01,440 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:32:01,446 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-16 12:32:01,446 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:32:01,446 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-16 12:32:01,447 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:01,448 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:01,448 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:32:01,448 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:32:01,449 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-16 12:32:01,449 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:32:01,456 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 9#L23-1true [2022-11-16 12:32:01,457 INFO L750 eck$LassoCheckResult]: Loop: 9#L23-1true assume !!(main_~x~0#1 < 255); 4#L18true assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 7#L18-2true assume 0 != main_~debug~0#1;main_~x~0#1 := 0; 9#L23-1true [2022-11-16 12:32:01,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-16 12:32:01,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925457827] [2022-11-16 12:32:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:01,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:01,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:01,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 40878, now seen corresponding path program 1 times [2022-11-16 12:32:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877983795] [2022-11-16 12:32:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:01,644 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:01,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2022-11-16 12:32:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:01,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717910335] [2022-11-16 12:32:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:01,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:32:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717910335] [2022-11-16 12:32:01,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717910335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:01,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:01,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:32:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109213601] [2022-11-16 12:32:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:01,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:32:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:01,961 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:01,991 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2022-11-16 12:32:01,993 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2022-11-16 12:32:01,994 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:01,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2022-11-16 12:32:01,998 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2022-11-16 12:32:01,999 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2022-11-16 12:32:01,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2022-11-16 12:32:02,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:32:02,000 INFO L218 hiAutomatonCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-11-16 12:32:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2022-11-16 12:32:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2022-11-16 12:32:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2022-11-16 12:32:02,046 INFO L240 hiAutomatonCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-11-16 12:32:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:02,054 INFO L428 stractBuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2022-11-16 12:32:02,055 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-16 12:32:02,055 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2022-11-16 12:32:02,055 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:02,056 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:32:02,056 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:32:02,057 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-16 12:32:02,057 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:32:02,058 INFO L748 eck$LassoCheckResult]: Stem: 31#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 32#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 33#L23-1 [2022-11-16 12:32:02,058 INFO L750 eck$LassoCheckResult]: Loop: 33#L23-1 assume !!(main_~x~0#1 < 255); 29#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 30#L18-2 assume !(0 != main_~debug~0#1); 33#L23-1 [2022-11-16 12:32:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2022-11-16 12:32:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297086474] [2022-11-16 12:32:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,067 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2022-11-16 12:32:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:02,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969973516] [2022-11-16 12:32:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:02,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2022-11-16 12:32:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:02,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124044139] [2022-11-16 12:32:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:02,181 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:32:02,182 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:32:02,182 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:32:02,182 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:32:02,183 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:32:02,183 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,183 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:32:02,183 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:32:02,183 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2022-11-16 12:32:02,184 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:32:02,184 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:32:02,200 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:02,219 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:02,307 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:32:02,308 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:32:02,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:02,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:02,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:32:02,363 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-16 12:32:02,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-11-16 12:32:02,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:02,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:02,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-16 12:32:02,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:32:02,395 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:02,449 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:32:02,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2022-11-16 12:32:02,453 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:32:02,454 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:32:02,454 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:32:02,454 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:32:02,454 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:32:02,454 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,454 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:32:02,454 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:32:02,455 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration2_Loop [2022-11-16 12:32:02,455 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:32:02,455 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:32:02,457 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:02,480 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:02,590 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:32:02,595 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:32:02,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:02,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:02,607 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 [2022-11-16 12:32:02,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:32:02,620 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:32:02,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:32:02,620 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:32:02,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:32:02,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:32:02,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:32:02,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-16 12:32:02,640 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:32:02,646 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:32:02,646 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:32:02,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:02,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:02,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-16 12:32:02,695 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:32:02,695 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:32:02,696 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:32:02,697 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2022-11-16 12:32:02,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:02,710 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:32:02,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:32:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:32:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:02,808 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-16 12:32:02,810 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:02,845 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 12 states and 15 transitions. Complement of second has 7 states. [2022-11-16 12:32:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:32:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2022-11-16 12:32:02,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 3 letters. [2022-11-16 12:32:02,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:02,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 3 letters. [2022-11-16 12:32:02,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:02,851 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 6 letters. [2022-11-16 12:32:02,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:02,851 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 15 transitions. [2022-11-16 12:32:02,852 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:02,854 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 15 transitions. [2022-11-16 12:32:02,854 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2022-11-16 12:32:02,854 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2022-11-16 12:32:02,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2022-11-16 12:32:02,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:32:02,855 INFO L218 hiAutomatonCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-16 12:32:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2022-11-16 12:32:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-16 12:32:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-16 12:32:02,858 INFO L240 hiAutomatonCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-16 12:32:02,858 INFO L428 stractBuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-16 12:32:02,858 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-16 12:32:02,859 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 14 transitions. [2022-11-16 12:32:02,859 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:02,859 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:32:02,860 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:32:02,860 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-16 12:32:02,860 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:32:02,861 INFO L748 eck$LassoCheckResult]: Stem: 89#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 90#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 94#L23-1 assume !!(main_~x~0#1 < 255); 85#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 86#L18-2 [2022-11-16 12:32:02,861 INFO L750 eck$LassoCheckResult]: Loop: 86#L18-2 assume !(0 != main_~debug~0#1); 91#L23-1 assume !!(main_~x~0#1 < 255); 95#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 86#L18-2 [2022-11-16 12:32:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-11-16 12:32:02,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:02,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963402578] [2022-11-16 12:32:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:02,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2022-11-16 12:32:02,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:02,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720594195] [2022-11-16 12:32:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2022-11-16 12:32:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:02,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533846700] [2022-11-16 12:32:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:02,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:02,945 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:32:02,945 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:32:02,945 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:32:02,945 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:32:02,945 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:32:02,946 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:02,946 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:32:02,946 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:32:02,946 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2022-11-16 12:32:02,946 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:32:02,947 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:32:02,948 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:02,958 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:03,035 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:32:03,035 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:32:03,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-16 12:32:03,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:32:03,052 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:03,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2022-11-16 12:32:03,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,092 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:32:03,092 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:03,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-16 12:32:03,141 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:32:03,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:03,155 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:32:03,155 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:32:03,155 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:32:03,155 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:32:03,155 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:32:03,156 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,156 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:32:03,156 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:32:03,156 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration3_Loop [2022-11-16 12:32:03,156 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:32:03,156 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:32:03,157 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:03,174 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:03,276 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:32:03,277 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:32:03,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,293 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 [2022-11-16 12:32:03,305 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:32:03,305 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:32:03,306 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:32:03,306 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:32:03,306 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:32:03,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-16 12:32:03,309 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:32:03,309 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:32:03,319 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:32:03,323 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:32:03,323 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:32:03,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,336 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:32:03,337 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:32:03,337 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:32:03,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-16 12:32:03,337 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2022-11-16 12:32:03,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:03,347 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:32:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:03,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:32:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:32:03,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:03,425 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-16 12:32:03,425 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:03,441 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 14 transitions. cyclomatic complexity: 5. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 17 states and 22 transitions. Complement of second has 7 states. [2022-11-16 12:32:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:32:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-11-16 12:32:03,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 3 letters. [2022-11-16 12:32:03,443 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:03,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-16 12:32:03,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:03,455 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 4 letters. Loop has 6 letters. [2022-11-16 12:32:03,455 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:03,456 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 22 transitions. [2022-11-16 12:32:03,458 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:03,461 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 22 transitions. [2022-11-16 12:32:03,462 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2022-11-16 12:32:03,463 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2022-11-16 12:32:03,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 22 transitions. [2022-11-16 12:32:03,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:32:03,468 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 12:32:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 22 transitions. [2022-11-16 12:32:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 12:32:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-16 12:32:03,471 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 12:32:03,472 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 12:32:03,472 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-16 12:32:03,472 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 22 transitions. [2022-11-16 12:32:03,473 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2022-11-16 12:32:03,473 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:32:03,473 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:32:03,474 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2022-11-16 12:32:03,474 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:32:03,474 INFO L748 eck$LassoCheckResult]: Stem: 161#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 162#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~post1#1, main_~x~0#1, main_~debug~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~debug~0#1 := 0; 167#L23-1 assume !!(main_~x~0#1 < 255); 171#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 163#L18-2 assume !(0 != main_~debug~0#1); 165#L23-1 assume !!(main_~x~0#1 < 255); 157#L18 assume 0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2);main_#t~post1#1 := main_~x~0#1;main_~x~0#1 := main_#t~post1#1 - 1;havoc main_#t~post1#1; 158#L18-2 [2022-11-16 12:32:03,477 INFO L750 eck$LassoCheckResult]: Loop: 158#L18-2 assume !(0 != main_~debug~0#1); 170#L23-1 assume !!(main_~x~0#1 < 255); 169#L18 assume !(0 != (if main_~x~0#1 < 0 && 0 != main_~x~0#1 % 2 then main_~x~0#1 % 2 - 2 else main_~x~0#1 % 2));main_~x~0#1 := 2 + main_~x~0#1; 158#L18-2 [2022-11-16 12:32:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2022-11-16 12:32:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:03,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115573339] [2022-11-16 12:32:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:32:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115573339] [2022-11-16 12:32:03,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115573339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:03,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:03,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:32:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609017449] [2022-11-16 12:32:03,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:03,722 INFO L753 eck$LassoCheckResult]: stem already infeasible [2022-11-16 12:32:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2022-11-16 12:32:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:32:03,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347968334] [2022-11-16 12:32:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:03,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:32:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:03,742 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:32:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:32:03,748 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:32:03,777 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:32:03,777 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:32:03,777 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:32:03,777 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:32:03,777 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:32:03,777 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,778 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:32:03,778 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:32:03,778 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2022-11-16 12:32:03,778 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:32:03,778 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:32:03,779 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:03,782 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:03,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:03,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-11-16 12:32:03,891 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:32:03,892 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:32:03,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-16 12:32:03,904 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:32:03,904 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:03,926 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:32:03,927 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~debug~0#1=0} Honda state: {ULTIMATE.start_main_~debug~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:32:03,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:03,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,938 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-16 12:32:03,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:32:03,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:03,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:03,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:03,984 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:03,997 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:32:03,997 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:32:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-16 12:32:04,040 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:32:04,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:04,049 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:32:04,049 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:32:04,049 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:32:04,049 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:32:04,050 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:32:04,050 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:04,050 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:32:04,050 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:32:04,050 INFO L133 ssoRankerPreferences]: Filename of dumped script: KroeningSharyginaTsitovichWintersteiger-CAV2010-Fig1.c_Iteration4_Loop [2022-11-16 12:32:04,050 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:32:04,050 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:32:04,051 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:04,055 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:32:04,163 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:32:04,163 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:32:04,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:04,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:04,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:04,176 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 [2022-11-16 12:32:04,189 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:32:04,189 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:32:04,189 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:32:04,189 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:32:04,189 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:32:04,190 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:32:04,190 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:32:04,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-16 12:32:04,211 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-16 12:32:04,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:04,220 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:04,224 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 [2022-11-16 12:32:04,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:32:04,237 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:32:04,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:32:04,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:32:04,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:32:04,241 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:32:04,242 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:32:04,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-16 12:32:04,255 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:32:04,259 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:32:04,259 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:32:04,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:32:04,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:32:04,261 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:32:04,270 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:32:04,270 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:32:04,270 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:32:04,270 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -1*ULTIMATE.start_main_~x~0#1 + 255 Supporting invariants [] [2022-11-16 12:32:04,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-16 12:32:04,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:04,280 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:32:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:32:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:32:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:04,364 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-16 12:32:04,364 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,379 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2022-11-16 12:32:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:32:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-11-16 12:32:04,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-16 12:32:04,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:04,381 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:32:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:04,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:32:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:32:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:04,432 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2022-11-16 12:32:04,432 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,444 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 28 transitions. Complement of second has 7 states. [2022-11-16 12:32:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:32:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2022-11-16 12:32:04,446 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-16 12:32:04,446 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:04,446 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:32:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:32:04,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:32:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:04,514 INFO L141 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 [2022-11-16 12:32:04,514 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,540 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 22 transitions. cyclomatic complexity: 8. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 32 transitions. Complement of second has 6 states. [2022-11-16 12:32:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:32:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2022-11-16 12:32:04,542 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2022-11-16 12:32:04,542 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:04,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2022-11-16 12:32:04,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:04,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2022-11-16 12:32:04,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:32:04,548 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 32 transitions. [2022-11-16 12:32:04,552 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-16 12:32:04,556 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 20 states and 26 transitions. [2022-11-16 12:32:04,556 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2022-11-16 12:32:04,556 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2022-11-16 12:32:04,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2022-11-16 12:32:04,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:32:04,557 INFO L218 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-16 12:32:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2022-11-16 12:32:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 9. [2022-11-16 12:32:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-16 12:32:04,560 INFO L240 hiAutomatonCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-16 12:32:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:32:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:04,561 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:04,571 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2022-11-16 12:32:04,572 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2022-11-16 12:32:04,572 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-16 12:32:04,572 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 0 states and 0 transitions. [2022-11-16 12:32:04,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-16 12:32:04,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-16 12:32:04,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-16 12:32:04,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:32:04,573 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:32:04,573 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:32:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:04,574 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:32:04,574 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-16 12:32:04,574 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:32:04,575 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-16 12:32:04,575 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-16 12:32:04,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.11 12:32:04 BoogieIcfgContainer [2022-11-16 12:32:04,582 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-16 12:32:04,583 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 12:32:04,583 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 12:32:04,583 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 12:32:04,583 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:32:01" (3/4) ... [2022-11-16 12:32:04,589 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-16 12:32:04,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 12:32:04,592 INFO L158 Benchmark]: Toolchain (without parser) took 3888.39ms. Allocated memory was 119.5MB in the beginning and 161.5MB in the end (delta: 41.9MB). Free memory was 81.5MB in the beginning and 104.0MB in the end (delta: -22.5MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2022-11-16 12:32:04,592 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:32:04,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.95ms. Allocated memory is still 119.5MB. Free memory was 81.3MB in the beginning and 94.5MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:32:04,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.53ms. Allocated memory is still 119.5MB. Free memory was 94.5MB in the beginning and 93.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:32:04,597 INFO L158 Benchmark]: Boogie Preprocessor took 21.24ms. Allocated memory is still 119.5MB. Free memory was 93.0MB in the beginning and 92.5MB in the end (delta: 529.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:32:04,607 INFO L158 Benchmark]: RCFGBuilder took 290.01ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 83.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:32:04,609 INFO L158 Benchmark]: BuchiAutomizer took 3259.88ms. Allocated memory was 119.5MB in the beginning and 161.5MB in the end (delta: 41.9MB). Free memory was 83.6MB in the beginning and 104.0MB in the end (delta: -20.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-16 12:32:04,609 INFO L158 Benchmark]: Witness Printer took 7.12ms. Allocated memory is still 161.5MB. Free memory is still 104.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:32:04,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.95ms. Allocated memory is still 119.5MB. Free memory was 81.3MB in the beginning and 94.5MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.53ms. Allocated memory is still 119.5MB. Free memory was 94.5MB in the beginning and 93.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.24ms. Allocated memory is still 119.5MB. Free memory was 93.0MB in the beginning and 92.5MB in the end (delta: 529.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 290.01ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 83.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 3259.88ms. Allocated memory was 119.5MB in the beginning and 161.5MB in the end (delta: 41.9MB). Free memory was 83.6MB in the beginning and 104.0MB in the end (delta: -20.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 7.12ms. Allocated memory is still 161.5MB. Free memory is still 104.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One deterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. One nondeterministic module has affine ranking function 255 + -1 * x and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.1s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 57 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 46 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc1 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp83 ukn100 mio100 lsp100 div346 bol100 ite100 ukn100 eq150 hnf94 smp47 dnf100 smp100 tf105 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 100ms VariablesStem: 0 VariablesLoop: 4 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-16 12:32:04,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:04,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628305a9-450b-4fa9-85c6-19036e97f539/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE