./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Flip2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX --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 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:43:33,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:43:33,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:43:33,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:43:33,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:43:33,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:43:33,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:43:33,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:43:33,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:43:33,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:43:33,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:43:33,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:43:33,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:43:33,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:43:33,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:43:33,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:43:33,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:43:33,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:43:33,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:43:33,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:43:33,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:43:33,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:43:33,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:43:33,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:43:33,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:43:33,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:43:33,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:43:33,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:43:33,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:43:33,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:43:33,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:43:33,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:43:33,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:43:33,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:43:33,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:43:33,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:43:33,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:43:33,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:43:33,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:43:33,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:43:33,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:43:33,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-09 10:43:33,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:43:33,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:43:33,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:43:33,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:43:33,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:43:33,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:43:33,362 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:43:33,362 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-09 10:43:33,362 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-09 10:43:33,363 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-09 10:43:33,363 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-09 10:43:33,363 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-09 10:43:33,363 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-09 10:43:33,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:43:33,364 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:43:33,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:43:33,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:43:33,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-09 10:43:33,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-09 10:43:33,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-09 10:43:33,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:43:33,366 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-09 10:43:33,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:43:33,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-09 10:43:33,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:43:33,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:43:33,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:43:33,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:43:33,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:43:33,369 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-09 10:43:33,369 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_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac [2021-11-09 10:43:33,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:43:33,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:43:33,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:43:33,714 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:43:33,715 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:43:33,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/termination-restricted-15/Flip2.c [2021-11-09 10:43:33,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/data/a8db85989/989443491abf4defa6eb5a5c41bffdb9/FLAGf533955f1 [2021-11-09 10:43:34,278 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:43:34,279 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/sv-benchmarks/c/termination-restricted-15/Flip2.c [2021-11-09 10:43:34,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/data/a8db85989/989443491abf4defa6eb5a5c41bffdb9/FLAGf533955f1 [2021-11-09 10:43:34,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/data/a8db85989/989443491abf4defa6eb5a5c41bffdb9 [2021-11-09 10:43:34,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:43:34,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:43:34,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:43:34,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:43:34,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:43:34,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754f1b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34, skipping insertion in model container [2021-11-09 10:43:34,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:43:34,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:43:34,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:43:34,894 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:43:34,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:43:34,943 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:43:34,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34 WrapperNode [2021-11-09 10:43:34,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:43:34,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:43:34,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:43:34,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:43:34,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:43:34,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:43:34,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:43:34,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:43:34,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:34,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:35,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:35,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:43:35,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:43:35,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:43:35,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:43:35,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2021-11-09 10:43:35,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:35,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:35,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:35,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-09 10:43:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:43:35,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:43:35,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:43:35,244 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-09 10:43:35,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:35 BoogieIcfgContainer [2021-11-09 10:43:35,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:43:35,247 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-09 10:43:35,248 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-09 10:43:35,251 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-09 10:43:35,252 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 10:43:35,252 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.11 10:43:34" (1/3) ... [2021-11-09 10:43:35,253 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@134b1113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 10:43:35, skipping insertion in model container [2021-11-09 10:43:35,253 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 10:43:35,254 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (2/3) ... [2021-11-09 10:43:35,254 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@134b1113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 10:43:35, skipping insertion in model container [2021-11-09 10:43:35,254 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 10:43:35,254 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:35" (3/3) ... [2021-11-09 10:43:35,256 INFO L389 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2021-11-09 10:43:35,317 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-09 10:43:35,317 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-09 10:43:35,317 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-09 10:43:35,317 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-09 10:43:35,317 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-09 10:43:35,317 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-09 10:43:35,317 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-09 10:43:35,317 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-09 10:43:35,331 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,350 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 10:43:35,350 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:35,351 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:35,359 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-11-09 10:43:35,359 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 10:43:35,359 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-09 10:43:35,359 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,361 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 10:43:35,361 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:35,361 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:35,361 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-11-09 10:43:35,362 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 10:43:35,370 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 3#L19-2true [2021-11-09 10:43:35,370 INFO L793 eck$LassoCheckResult]: Loop: 3#L19-2true assume !!(main_~i~0 > 0 && main_~j~0 > 0); 9#L14true assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 3#L19-2true [2021-11-09 10:43:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-11-09 10:43:35,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:35,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170968608] [2021-11-09 10:43:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:35,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:35,465 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:35,487 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-11-09 10:43:35,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:35,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356058983] [2021-11-09 10:43:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:35,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:35,509 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:35,519 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-11-09 10:43:35,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:35,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519779150] [2021-11-09 10:43:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:35,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:35,532 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:35,542 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:35,661 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:35,662 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:35,662 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:35,663 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:35,663 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 10:43:35,663 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:35,663 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:35,663 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:35,663 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2021-11-09 10:43:35,664 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:35,664 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:35,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:35,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:35,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:35,815 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:35,815 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 10:43:35,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:35,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:35,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-09 10:43:35,874 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:35,874 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:35,902 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 10:43:35,902 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-09 10:43:35,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:35,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:35,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:35,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:35,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:35,967 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:35,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-09 10:43:36,006 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 10:43:36,006 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-09 10:43:36,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:36,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:36,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:36,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:36,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:36,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-09 10:43:36,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:36,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:36,146 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:36,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 10:43:36,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:36,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-09 10:43:36,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 10:43:36,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-11-09 10:43:36,534 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:36,534 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:36,534 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:36,535 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:36,535 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 10:43:36,535 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,535 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:36,535 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:36,535 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2021-11-09 10:43:36,536 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:36,536 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:36,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:36,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:36,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:36,697 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:36,702 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 10:43:36,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:36,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:36,715 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:36,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:36,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:36,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:36,728 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:36,742 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 10:43:36,743 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 10:43:36,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-09 10:43:36,759 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 10:43:36,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:36,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:36,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:36,817 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:36,829 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:36,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:36,830 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:36,830 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:36,838 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 10:43:36,838 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 10:43:36,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-09 10:43:36,864 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 10:43:36,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:36,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:36,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:36,919 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:36,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:36,930 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 10:43:36,931 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:36,931 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:36,931 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:36,936 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 10:43:36,936 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 10:43:36,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-09 10:43:36,952 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 10:43:36,960 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-09 10:43:36,961 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-09 10:43:36,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:36,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:36,975 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 10:43:36,975 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 10:43:36,975 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 10:43:36,976 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-11-09 10:43:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-09 10:43:37,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:37,019 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 10:43:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:43:37,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:37,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:43:37,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:37,127 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-09 10:43:37,128 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,190 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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 30 states and 43 transitions. Complement of second has 8 states. [2021-11-09 10:43:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-09 10:43:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2021-11-09 10:43:37,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2021-11-09 10:43:37,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:37,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2021-11-09 10:43:37,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:37,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2021-11-09 10:43:37,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:37,197 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2021-11-09 10:43:37,201 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-09 10:43:37,205 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2021-11-09 10:43:37,206 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-11-09 10:43:37,206 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-11-09 10:43:37,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-11-09 10:43:37,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:37,207 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-11-09 10:43:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-11-09 10:43:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-09 10:43:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2021-11-09 10:43:37,233 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-11-09 10:43:37,234 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-11-09 10:43:37,234 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-09 10:43:37,234 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2021-11-09 10:43:37,235 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-09 10:43:37,235 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:37,235 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:37,236 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-09 10:43:37,236 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 10:43:37,236 INFO L791 eck$LassoCheckResult]: Stem: 79#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 80#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 76#L14 [2021-11-09 10:43:37,237 INFO L793 eck$LassoCheckResult]: Loop: 76#L14 assume !(main_~i~0 < main_~j~0); 84#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 75#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 76#L14 [2021-11-09 10:43:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-11-09 10:43:37,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:37,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90358856] [2021-11-09 10:43:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:37,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:37,245 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:37,251 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2021-11-09 10:43:37,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:37,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895141553] [2021-11-09 10:43:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:37,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:37,260 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:37,267 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2021-11-09 10:43:37,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:37,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610420204] [2021-11-09 10:43:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:37,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:37,278 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:37,288 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:37,329 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:37,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:37,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:37,330 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:37,330 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 10:43:37,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,331 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:37,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:37,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2021-11-09 10:43:37,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:37,331 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:37,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:37,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:37,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:37,413 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:37,413 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 10:43:37,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:37,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:37,449 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:37,450 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:37,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-09 10:43:37,481 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 10:43:37,481 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-09 10:43:37,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:37,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:37,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:37,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:37,541 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:37,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-09 10:43:37,573 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 10:43:37,574 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-09 10:43:37,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:37,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:37,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:37,666 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:37,666 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:37,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-09 10:43:37,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:37,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:37,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:37,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 10:43:37,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:37,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-09 10:43:37,874 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 10:43:37,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-11-09 10:43:37,877 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:37,877 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:37,877 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:37,877 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:37,877 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 10:43:37,878 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,878 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:37,878 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:37,878 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2021-11-09 10:43:37,878 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:37,878 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:37,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:37,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:37,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:37,957 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:37,957 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 10:43:37,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:37,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:37,971 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:37,984 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:37,985 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:37,985 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:37,985 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:37,991 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 10:43:37,994 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 10:43:37,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-09 10:43:38,009 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 10:43:38,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,054 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,061 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:38,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-09 10:43:38,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:38,072 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:38,072 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:38,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:38,085 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 10:43:38,085 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 10:43:38,103 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 10:43:38,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,161 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:38,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-09 10:43:38,170 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:38,171 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 10:43:38,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:38,171 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:38,171 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:38,172 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 10:43:38,173 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 10:43:38,187 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 10:43:38,207 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2021-11-09 10:43:38,207 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-11-09 10:43:38,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,210 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,215 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 10:43:38,216 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 10:43:38,216 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 10:43:38,216 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-11-09 10:43:38,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-09 10:43:38,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,256 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 10:43:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:43:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:38,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:43:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:38,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-11-09 10:43:38,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:38,432 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-09 10:43:38,433 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,477 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9. 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 34 states and 49 transitions. Complement of second has 7 states. [2021-11-09 10:43:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-09 10:43:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-09 10:43:38,479 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2021-11-09 10:43:38,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:38,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2021-11-09 10:43:38,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:38,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2021-11-09 10:43:38,481 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:38,481 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2021-11-09 10:43:38,483 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-11-09 10:43:38,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2021-11-09 10:43:38,488 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-11-09 10:43:38,489 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-11-09 10:43:38,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2021-11-09 10:43:38,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:38,489 INFO L681 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2021-11-09 10:43:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2021-11-09 10:43:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-11-09 10:43:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2021-11-09 10:43:38,499 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2021-11-09 10:43:38,499 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2021-11-09 10:43:38,499 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-09 10:43:38,499 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2021-11-09 10:43:38,502 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-11-09 10:43:38,502 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:38,502 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:38,503 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-09 10:43:38,503 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 10:43:38,504 INFO L791 eck$LassoCheckResult]: Stem: 164#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 165#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 172#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2021-11-09 10:43:38,505 INFO L793 eck$LassoCheckResult]: Loop: 166#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 160#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 161#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2021-11-09 10:43:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:38,506 INFO L85 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-11-09 10:43:38,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:38,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691580586] [2021-11-09 10:43:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:38,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:38,520 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:38,535 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2021-11-09 10:43:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:38,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576092525] [2021-11-09 10:43:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:38,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:38,546 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:38,556 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2021-11-09 10:43:38,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:38,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322066932] [2021-11-09 10:43:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:38,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:38,580 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:38,588 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:38,628 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:38,629 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:38,629 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:38,629 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:38,629 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 10:43:38,630 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,631 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:38,631 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:38,631 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2021-11-09 10:43:38,631 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:38,631 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:38,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:38,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:38,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:38,698 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:38,698 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 10:43:38,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,705 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,707 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:38,707 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-09 10:43:38,729 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 10:43:38,729 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-09 10:43:38,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,773 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:38,780 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:38,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-09 10:43:38,805 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 10:43:38,805 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-09 10:43:38,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,841 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:38,841 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-09 10:43:38,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:38,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:38,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,885 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-09 10:43:38,887 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 10:43:38,887 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:39,108 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 10:43:39,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-11-09 10:43:39,111 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:39,111 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:39,111 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:39,111 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:39,111 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 10:43:39,111 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,112 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:39,112 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:39,112 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2021-11-09 10:43:39,112 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:39,112 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:39,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:39,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:39,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:39,188 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:39,188 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 10:43:39,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:39,197 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:39,199 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:39,209 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:39,209 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:39,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:39,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:39,213 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 10:43:39,213 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 10:43:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-09 10:43:39,228 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 10:43:39,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:39,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:39,262 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:39,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-09 10:43:39,264 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:39,272 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:39,272 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 10:43:39,272 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:39,273 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:39,273 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:39,277 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 10:43:39,277 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 10:43:39,288 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 10:43:39,294 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-11-09 10:43:39,294 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-09 10:43:39,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:39,299 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:39,301 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 10:43:39,302 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 10:43:39,302 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 10:43:39,302 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-11-09 10:43:39,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-09 10:43:39,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:39,343 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 10:43:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:43:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:39,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:43:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:39,457 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-09 10:43:39,457 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:39,484 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 62 states and 91 transitions. Complement of second has 5 states. [2021-11-09 10:43:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-09 10:43:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2021-11-09 10:43:39,488 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2021-11-09 10:43:39,488 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:39,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2021-11-09 10:43:39,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:39,493 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2021-11-09 10:43:39,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:39,494 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2021-11-09 10:43:39,499 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2021-11-09 10:43:39,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2021-11-09 10:43:39,510 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-11-09 10:43:39,511 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2021-11-09 10:43:39,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2021-11-09 10:43:39,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:39,512 INFO L681 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2021-11-09 10:43:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2021-11-09 10:43:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-11-09 10:43:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2021-11-09 10:43:39,522 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2021-11-09 10:43:39,522 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2021-11-09 10:43:39,523 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-09 10:43:39,523 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2021-11-09 10:43:39,524 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2021-11-09 10:43:39,528 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:39,528 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:39,528 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-11-09 10:43:39,529 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 10:43:39,529 INFO L791 eck$LassoCheckResult]: Stem: 289#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 290#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 316#L14 assume !(main_~i~0 < main_~j~0); 291#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 292#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 301#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2021-11-09 10:43:39,529 INFO L793 eck$LassoCheckResult]: Loop: 299#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 310#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2021-11-09 10:43:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2021-11-09 10:43:39,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:39,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667052664] [2021-11-09 10:43:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:39,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:39,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:39,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667052664] [2021-11-09 10:43:39,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667052664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:39,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:39,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:43:39,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43527791] [2021-11-09 10:43:39,627 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-09 10:43:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-11-09 10:43:39,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:39,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823829912] [2021-11-09 10:43:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:39,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:39,652 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:39,657 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:39,713 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:39,713 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:39,713 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:39,713 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:39,714 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 10:43:39,714 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,714 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:39,714 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:39,714 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2021-11-09 10:43:39,714 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:39,714 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:39,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:39,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:39,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:39,803 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:39,803 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 10:43:39,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:39,809 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:39,811 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:39,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:39,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-09 10:43:39,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:39,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:39,883 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:39,887 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 10:43:39,887 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:39,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-11-09 10:43:40,270 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 10:43:40,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:40,273 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:40,273 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:40,273 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:40,273 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:40,273 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 10:43:40,274 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,274 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:40,274 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:40,274 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2021-11-09 10:43:40,274 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:40,274 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:40,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,379 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:40,379 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 10:43:40,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:40,389 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:40,393 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:40,404 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:40,404 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 10:43:40,405 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:40,405 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:40,405 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:40,407 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 10:43:40,407 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 10:43:40,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-09 10:43:40,432 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 10:43:40,438 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-09 10:43:40,438 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-09 10:43:40,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:40,440 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:40,462 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 10:43:40,462 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 10:43:40,463 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 10:43:40,463 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-11-09 10:43:40,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-09 10:43:40,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:40,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:40,521 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 10:43:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:43:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:40,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:43:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:40,600 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-09 10:43:40,600 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,620 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 73 states and 104 transitions. Complement of second has 7 states. [2021-11-09 10:43:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-09 10:43:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-11-09 10:43:40,621 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-09 10:43:40,621 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:40,622 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-09 10:43:40,622 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:40,622 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2021-11-09 10:43:40,622 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:40,622 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2021-11-09 10:43:40,625 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2021-11-09 10:43:40,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2021-11-09 10:43:40,626 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-11-09 10:43:40,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2021-11-09 10:43:40,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2021-11-09 10:43:40,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:40,627 INFO L681 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2021-11-09 10:43:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2021-11-09 10:43:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-11-09 10:43:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2021-11-09 10:43:40,632 INFO L704 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2021-11-09 10:43:40,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:40,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:40,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:40,637 INFO L87 Difference]: Start difference. First operand 42 states and 62 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:40,655 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-11-09 10:43:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:40,656 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2021-11-09 10:43:40,657 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2021-11-09 10:43:40,658 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2021-11-09 10:43:40,659 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-11-09 10:43:40,659 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2021-11-09 10:43:40,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2021-11-09 10:43:40,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:40,659 INFO L681 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-11-09 10:43:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2021-11-09 10:43:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-11-09 10:43:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2021-11-09 10:43:40,664 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2021-11-09 10:43:40,664 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2021-11-09 10:43:40,664 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-09 10:43:40,664 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2021-11-09 10:43:40,665 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2021-11-09 10:43:40,665 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:40,665 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:40,666 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-11-09 10:43:40,666 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 10:43:40,666 INFO L791 eck$LassoCheckResult]: Stem: 543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 544#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 552#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 571#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 572#L14 assume !(main_~i~0 < main_~j~0); 578#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 539#L19-2 [2021-11-09 10:43:40,666 INFO L793 eck$LassoCheckResult]: Loop: 539#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 540#L14 assume !(main_~i~0 < main_~j~0); 545#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 539#L19-2 [2021-11-09 10:43:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2021-11-09 10:43:40,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:40,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750445053] [2021-11-09 10:43:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:40,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:40,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:40,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750445053] [2021-11-09 10:43:40,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750445053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:40,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:40,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:43:40,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326616797] [2021-11-09 10:43:40,697 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-09 10:43:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2021-11-09 10:43:40,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:40,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356006358] [2021-11-09 10:43:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:40,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:40,702 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:40,705 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:40,735 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:40,735 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:40,735 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:40,735 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:40,735 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 10:43:40,736 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,736 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:40,736 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:40,736 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2021-11-09 10:43:40,736 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:40,736 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:40,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,789 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:40,789 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 10:43:40,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:40,795 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:40,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-09 10:43:40,798 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 10:43:40,798 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:40,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:40,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:40,857 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:40,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 10:43:40,859 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 10:43:40,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-09 10:43:40,951 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 10:43:40,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-11-09 10:43:40,954 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 10:43:40,954 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 10:43:40,954 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 10:43:40,954 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 10:43:40,954 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 10:43:40,954 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:40,954 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 10:43:40,954 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 10:43:40,954 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2021-11-09 10:43:40,954 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 10:43:40,954 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 10:43:40,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:40,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 10:43:41,024 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 10:43:41,024 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 10:43:41,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:41,025 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:41,029 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:41,039 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:41,039 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:41,039 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:41,040 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:41,042 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 10:43:41,042 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 10:43:41,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-11-09 10:43:41,060 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 10:43:41,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-11-09 10:43:41,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:41,097 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:41,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-09 10:43:41,099 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-09 10:43:41,107 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 10:43:41,107 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 10:43:41,107 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 10:43:41,107 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 10:43:41,107 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 10:43:41,108 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 10:43:41,108 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 10:43:41,132 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 10:43:41,146 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2021-11-09 10:43:41,146 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-11-09 10:43:41,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 10:43:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:41,147 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:41,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-11-09 10:43:41,149 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 10:43:41,149 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 10:43:41,149 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 10:43:41,149 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-11-09 10:43:41,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:41,175 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 10:43:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:43:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:41,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:43:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:41,284 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-09 10:43:41,284 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,308 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 81 states and 106 transitions. Complement of second has 5 states. [2021-11-09 10:43:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-09 10:43:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2021-11-09 10:43:41,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2021-11-09 10:43:41,310 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:41,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2021-11-09 10:43:41,310 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:41,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2021-11-09 10:43:41,311 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 10:43:41,311 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2021-11-09 10:43:41,313 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-09 10:43:41,314 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2021-11-09 10:43:41,315 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-11-09 10:43:41,315 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-11-09 10:43:41,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2021-11-09 10:43:41,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:41,315 INFO L681 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-11-09 10:43:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2021-11-09 10:43:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-11-09 10:43:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2021-11-09 10:43:41,321 INFO L704 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2021-11-09 10:43:41,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:41,322 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:41,339 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-11-09 10:43:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:41,339 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2021-11-09 10:43:41,341 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-11-09 10:43:41,342 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2021-11-09 10:43:41,342 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-11-09 10:43:41,342 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-11-09 10:43:41,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2021-11-09 10:43:41,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 10:43:41,343 INFO L681 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-11-09 10:43:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2021-11-09 10:43:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2021-11-09 10:43:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-09 10:43:41,347 INFO L704 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-09 10:43:41,347 INFO L587 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-09 10:43:41,347 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-09 10:43:41,348 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2021-11-09 10:43:41,348 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-11-09 10:43:41,349 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 10:43:41,349 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 10:43:41,349 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-11-09 10:43:41,349 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2021-11-09 10:43:41,350 INFO L791 eck$LassoCheckResult]: Stem: 819#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 820#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 835#L14 assume !(main_~i~0 < main_~j~0); 823#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 824#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 816#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2021-11-09 10:43:41,350 INFO L793 eck$LassoCheckResult]: Loop: 828#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 826#L14 assume !(main_~i~0 < main_~j~0); 827#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 838#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 841#L14 assume !(main_~i~0 < main_~j~0); 821#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 822#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 840#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2021-11-09 10:43:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2021-11-09 10:43:41,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:41,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975564520] [2021-11-09 10:43:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:41,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:41,359 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:41,367 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2021-11-09 10:43:41,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:41,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970566977] [2021-11-09 10:43:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:41,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:41,381 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:41,391 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2021-11-09 10:43:41,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:41,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763436196] [2021-11-09 10:43:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:41,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:41,421 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:43:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:43:41,434 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:43:41,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.11 10:43:41 BoogieIcfgContainer [2021-11-09 10:43:41,603 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-09 10:43:41,604 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:43:41,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:43:41,604 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:43:41,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:35" (3/4) ... [2021-11-09 10:43:41,607 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-11-09 10:43:41,644 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 10:43:41,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:43:41,646 INFO L168 Benchmark]: Toolchain (without parser) took 6970.84 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 59.6 MB in the beginning and 41.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 37.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:43:41,646 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 64.6 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:43:41,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.34 ms. Allocated memory is still 94.4 MB. Free memory was 59.6 MB in the beginning and 71.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:43:41,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.44 ms. Allocated memory is still 94.4 MB. Free memory was 71.7 MB in the beginning and 70.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:43:41,648 INFO L168 Benchmark]: Boogie Preprocessor took 16.89 ms. Allocated memory is still 94.4 MB. Free memory was 70.4 MB in the beginning and 69.6 MB in the end (delta: 783.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:43:41,648 INFO L168 Benchmark]: RCFGBuilder took 244.45 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 62.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-09 10:43:41,649 INFO L168 Benchmark]: BuchiAutomizer took 6356.10 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.7 MB in the beginning and 43.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 40.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:43:41,649 INFO L168 Benchmark]: Witness Printer took 40.19 ms. Allocated memory is still 113.2 MB. Free memory was 43.4 MB in the beginning and 41.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:43:41,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 64.6 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 263.34 ms. Allocated memory is still 94.4 MB. Free memory was 59.6 MB in the beginning and 71.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.44 ms. Allocated memory is still 94.4 MB. Free memory was 71.7 MB in the beginning and 70.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.89 ms. Allocated memory is still 94.4 MB. Free memory was 70.4 MB in the beginning and 69.6 MB in the end (delta: 783.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 244.45 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 62.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6356.10 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.7 MB in the beginning and 43.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 40.5 MB. Max. memory is 16.1 GB. * Witness Printer took 40.19 ms. Allocated memory is still 113.2 MB. Free memory was 43.4 MB in the beginning and 41.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function j and consists of 5 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function i + -1 * j and consists of 3 locations. One deterministic module has affine ranking function j and consists of 4 locations. One deterministic module has affine ranking function i and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 37 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.2s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 5.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 4. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 34 SDtfs, 31 SDslu, 6 SDs, 0 SdLazy, 83 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax180 hnf100 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf92 smp100 dnf100 smp100 tf109 neg100 sie114 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 56ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.9s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {t=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3995612c=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@36526ce9=0, i=2, j=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-11-09 10:43:41,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:41,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:42,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68547d1f-816a-4299-a51f-44a87ffd7cd4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)