./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD --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 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:03:57,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:03:57,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:03:57,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:03:57,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:03:57,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:03:57,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:03:57,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:03:57,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:03:57,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:03:57,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:03:57,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:03:57,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:03:57,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:03:57,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:03:57,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:03:57,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:03:57,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:03:57,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:03:57,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:03:57,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:03:57,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:03:57,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:03:57,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:03:57,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:03:57,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:03:57,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:03:57,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:03:57,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:03:57,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:03:57,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:03:57,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:03:57,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:03:57,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:03:57,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:03:57,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:03:57,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:03:57,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:03:57,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:03:57,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:03:57,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:03:57,389 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 23:03:57,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:03:57,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:03:57,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:03:57,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:03:57,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:03:57,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:03:57,442 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:03:57,443 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:03:57,443 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:03:57,443 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:03:57,444 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:03:57,444 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:03:57,445 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:03:57,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:03:57,445 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:03:57,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:03:57,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:03:57,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:03:57,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:03:57,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:03:57,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:03:57,447 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:03:57,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:03:57,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:03:57,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:03:57,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:03:57,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:03:57,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:03:57,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:03:57,451 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:03:57,452 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_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac [2021-10-28 23:03:57,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:03:57,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:03:57,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:03:57,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:03:57,743 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:03:57,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-restricted-15/Flip2.c [2021-10-28 23:03:57,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/data/9c78b9027/06c0eb5fb7d7472e980735ffa3b964e7/FLAGee282b67e [2021-10-28 23:03:58,362 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:03:58,362 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/sv-benchmarks/c/termination-restricted-15/Flip2.c [2021-10-28 23:03:58,373 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/data/9c78b9027/06c0eb5fb7d7472e980735ffa3b964e7/FLAGee282b67e [2021-10-28 23:03:58,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/data/9c78b9027/06c0eb5fb7d7472e980735ffa3b964e7 [2021-10-28 23:03:58,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:03:58,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:03:58,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:03:58,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:03:58,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:03:58,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733be1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58, skipping insertion in model container [2021-10-28 23:03:58,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:03:58,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:03:58,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:03:58,879 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:03:58,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:03:58,905 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:03:58,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58 WrapperNode [2021-10-28 23:03:58,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:03:58,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:03:58,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:03:58,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:03:58,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:03:58,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:03:58,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:03:58,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:03:58,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:03:58,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:03:58,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:03:58,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:03:58,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (1/1) ... [2021-10-28 23:03:58,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:03:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:03:58,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:03:59,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:03:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:03:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:03:59,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:03:59,174 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 23:03:59,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:03:59 BoogieIcfgContainer [2021-10-28 23:03:59,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:03:59,177 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:03:59,177 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:03:59,180 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:03:59,181 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:03:59,181 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:03:58" (1/3) ... [2021-10-28 23:03:59,182 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@18b296c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:03:59, skipping insertion in model container [2021-10-28 23:03:59,182 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:03:59,182 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:03:58" (2/3) ... [2021-10-28 23:03:59,183 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@18b296c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:03:59, skipping insertion in model container [2021-10-28 23:03:59,183 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:03:59,183 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:03:59" (3/3) ... [2021-10-28 23:03:59,185 INFO L389 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2021-10-28 23:03:59,229 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:03:59,229 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:03:59,229 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:03:59,229 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:03:59,229 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:03:59,230 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:03:59,230 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:03:59,230 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:03:59,243 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) [2021-10-28 23:03:59,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:03:59,260 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:03:59,260 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:03:59,266 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:03:59,266 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:03:59,267 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:03:59,267 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) [2021-10-28 23:03:59,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:03:59,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:03:59,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:03:59,269 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:03:59,269 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:03:59,275 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 [2021-10-28 23:03:59,276 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 [2021-10-28 23:03:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:03:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-28 23:03:59,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:03:59,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869661176] [2021-10-28 23:03:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:03:59,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:03:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:03:59,363 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:03:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:03:59,382 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:03:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:03:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-10-28 23:03:59,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:03:59,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127090800] [2021-10-28 23:03:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:03:59,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:03:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:03:59,399 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:03:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:03:59,407 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:03:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:03:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-28 23:03:59,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:03:59,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625289075] [2021-10-28 23:03:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:03:59,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:03:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:03:59,417 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:03:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:03:59,424 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:03:59,513 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:03:59,513 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:03:59,513 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:03:59,514 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:03:59,514 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:03:59,514 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:03:59,514 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:03:59,514 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:03:59,514 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2021-10-28 23:03:59,514 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:03:59,515 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:03:59,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:03:59,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:03:59,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:03:59,674 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:03:59,675 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:03:59,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:03:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:03:59,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:03:59,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:03:59,685 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:03:59,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 23:03:59,720 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:03:59,721 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: [] [2021-10-28 23:03:59,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:03:59,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:03:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:03:59,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:03:59,765 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:03:59,766 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:03:59,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 23:03:59,797 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:03:59,797 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: [] [2021-10-28 23:03:59,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:03:59,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:03:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:03:59,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:03:59,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:03:59,839 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:03:59,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 23:03:59,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:03:59,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:03:59,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:03:59,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:03:59,927 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:03:59,927 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:03:59,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 23:04:00,297 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:04:00,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:00,310 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:00,310 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:00,310 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:00,311 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:00,311 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:04:00,311 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,311 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:00,311 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:00,311 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2021-10-28 23:04:00,311 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:00,311 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:00,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:00,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:00,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:00,401 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:00,406 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:04:00,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:00,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:00,431 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 [2021-10-28 23:04:00,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 23:04:00,441 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:00,441 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:00,441 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:00,441 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:00,446 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:04:00,447 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:04:00,465 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:04:00,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-10-28 23:04:00,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:00,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:00,501 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 [2021-10-28 23:04:00,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 23:04:00,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:00,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:00,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:00,510 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:00,521 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:04:00,521 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:04:00,536 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:04:00,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:00,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:00,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:00,583 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 [2021-10-28 23:04:00,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:00,592 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:04:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 23:04:00,593 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:00,593 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:00,593 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:00,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:04:00,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:04:00,609 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:04:00,614 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:04:00,614 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:04:00,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:00,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:00,622 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:04:00,623 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:04:00,623 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:04:00,623 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-10-28 23:04:00,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 23:04:00,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:00,659 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:04:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:04:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:00,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:04:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:00,740 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 [2021-10-28 23:04:00,742 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) [2021-10-28 23:04:00,788 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. [2021-10-28 23:04:00,789 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 [2021-10-28 23:04:00,790 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) [2021-10-28 23:04:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2021-10-28 23:04:00,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2021-10-28 23:04:00,793 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:00,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2021-10-28 23:04:00,793 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:00,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2021-10-28 23:04:00,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:00,794 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2021-10-28 23:04:00,798 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 23:04:00,801 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2021-10-28 23:04:00,802 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-10-28 23:04:00,803 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-10-28 23:04:00,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-10-28 23:04:00,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:00,804 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-10-28 23:04:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-10-28 23:04:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-28 23:04:00,828 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) [2021-10-28 23:04:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2021-10-28 23:04:00,830 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-10-28 23:04:00,830 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-10-28 23:04:00,830 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:04:00,831 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2021-10-28 23:04:00,831 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 23:04:00,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:04:00,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:04:00,832 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:04:00,832 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:04:00,832 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 [2021-10-28 23:04:00,833 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 [2021-10-28 23:04:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-28 23:04:00,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:00,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124350759] [2021-10-28 23:04:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:00,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:00,839 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:00,843 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2021-10-28 23:04:00,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:00,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335837471] [2021-10-28 23:04:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:00,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:00,851 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:00,856 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2021-10-28 23:04:00,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:00,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384369406] [2021-10-28 23:04:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:00,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:00,865 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:00,874 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:00,922 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:00,922 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:00,922 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:00,922 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:00,923 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:04:00,923 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,923 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:00,923 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:00,923 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2021-10-28 23:04:00,923 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:00,923 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:00,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:00,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:00,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:00,998 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:00,999 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:04:00,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:01,033 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 23:04:01,063 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:04:01,063 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: [] [2021-10-28 23:04:01,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,089 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 23:04:01,093 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:01,093 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,106 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:04:01,106 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: [] [2021-10-28 23:04:01,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-10-28 23:04:01,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 23:04:01,132 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:01,132 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 23:04:01,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:04:01,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,278 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:04:01,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,285 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:01,286 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:01,286 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:01,286 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:01,286 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:04:01,286 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,286 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:01,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:01,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2021-10-28 23:04:01,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:01,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:01,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:01,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:01,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:01,353 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:01,353 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:04:01,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 23:04:01,360 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 [2021-10-28 23:04:01,367 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:01,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:01,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:01,367 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:01,370 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:04:01,371 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:04:01,383 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:04:01,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-10-28 23:04:01,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 23:04:01,405 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 [2021-10-28 23:04:01,412 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:01,412 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:01,413 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:01,413 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:01,415 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:04:01,415 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:04:01,429 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:04:01,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 23:04:01,454 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 [2021-10-28 23:04:01,463 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:01,463 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:04:01,463 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:01,464 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:01,464 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:01,465 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:04:01,466 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:04:01,481 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:04:01,496 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2021-10-28 23:04:01,497 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-10-28 23:04:01,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,511 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:04:01,511 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:04:01,511 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:04:01,511 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 23:04:01,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 23:04:01,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,545 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:04:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:01,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:04:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:01,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:04:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:01,612 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 [2021-10-28 23:04:01,612 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) [2021-10-28 23:04:01,638 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. [2021-10-28 23:04:01,639 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 [2021-10-28 23:04:01,639 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) [2021-10-28 23:04:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-10-28 23:04:01,640 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2021-10-28 23:04:01,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:01,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2021-10-28 23:04:01,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:01,642 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2021-10-28 23:04:01,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:01,642 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2021-10-28 23:04:01,644 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-10-28 23:04:01,646 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2021-10-28 23:04:01,646 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2021-10-28 23:04:01,646 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-10-28 23:04:01,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2021-10-28 23:04:01,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:01,647 INFO L681 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2021-10-28 23:04:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2021-10-28 23:04:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-10-28 23:04:01,650 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) [2021-10-28 23:04:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2021-10-28 23:04:01,651 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2021-10-28 23:04:01,651 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2021-10-28 23:04:01,651 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:04:01,651 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2021-10-28 23:04:01,653 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-10-28 23:04:01,653 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:04:01,653 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:04:01,653 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 23:04:01,654 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:04:01,654 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 [2021-10-28 23:04:01,654 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 [2021-10-28 23:04:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:01,655 INFO L85 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-10-28 23:04:01,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:01,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630181931] [2021-10-28 23:04:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:01,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:01,661 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:01,666 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2021-10-28 23:04:01,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:01,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106380023] [2021-10-28 23:04:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:01,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:01,675 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:01,679 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2021-10-28 23:04:01,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:01,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467478337] [2021-10-28 23:04:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:01,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:01,687 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:01,694 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:01,717 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:01,717 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:01,717 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:01,718 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:01,718 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:04:01,718 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,718 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:01,718 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:01,718 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2021-10-28 23:04:01,718 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:01,719 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:01,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:01,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:01,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:01,758 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:01,759 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:04:01,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 23:04:01,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:01,766 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,784 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:04:01,784 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: [] [2021-10-28 23:04:01,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,821 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 23:04:01,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:01,829 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,853 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:04:01,853 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: [] [2021-10-28 23:04:01,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,894 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,905 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:01,905 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:01,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 23:04:01,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:01,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:01,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:01,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:01,982 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:04:01,983 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:02,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 23:04:02,148 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:04:02,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,151 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:02,151 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:02,151 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:02,151 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:02,151 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:04:02,151 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,152 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:02,152 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:02,152 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2021-10-28 23:04:02,152 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:02,152 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:02,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:02,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:02,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:02,215 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:02,215 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:04:02,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:02,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:02,231 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 [2021-10-28 23:04:02,240 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:02,240 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:02,241 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:02,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:02,245 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:04:02,245 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:04:02,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 23:04:02,260 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:04:02,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:02,288 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:02,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 23:04:02,289 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 [2021-10-28 23:04:02,296 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:02,297 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:04:02,297 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:02,297 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:02,297 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:02,298 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:04:02,298 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:04:02,303 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:04:02,307 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-28 23:04:02,307 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:04:02,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:02,308 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:02,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 23:04:02,310 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:04:02,310 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:04:02,310 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:04:02,310 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 [] [2021-10-28 23:04:02,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,330 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:04:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:04:02,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:02,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:04:02,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:02,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:02,490 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 [2021-10-28 23:04:02,490 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) [2021-10-28 23:04:02,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,528 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. [2021-10-28 23:04:02,537 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 [2021-10-28 23:04:02,537 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) [2021-10-28 23:04:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2021-10-28 23:04:02,537 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2021-10-28 23:04:02,538 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:02,538 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2021-10-28 23:04:02,538 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:02,538 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2021-10-28 23:04:02,539 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:02,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2021-10-28 23:04:02,542 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2021-10-28 23:04:02,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2021-10-28 23:04:02,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-10-28 23:04:02,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2021-10-28 23:04:02,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2021-10-28 23:04:02,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:02,545 INFO L681 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2021-10-28 23:04:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2021-10-28 23:04:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-10-28 23:04:02,549 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) [2021-10-28 23:04:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2021-10-28 23:04:02,550 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2021-10-28 23:04:02,550 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2021-10-28 23:04:02,550 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:04:02,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2021-10-28 23:04:02,552 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2021-10-28 23:04:02,552 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:04:02,552 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:04:02,561 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-10-28 23:04:02,561 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:04:02,561 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 [2021-10-28 23:04:02,561 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 [2021-10-28 23:04:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:02,562 INFO L85 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2021-10-28 23:04:02,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:02,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606928630] [2021-10-28 23:04:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:02,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:02,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:02,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:04:02,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606928630] [2021-10-28 23:04:02,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606928630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:04:02,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:04:02,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:04:02,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444893177] [2021-10-28 23:04:02,648 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:04:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-10-28 23:04:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:02,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143507117] [2021-10-28 23:04:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:02,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:02,674 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:02,682 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:02,732 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:02,733 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:02,733 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:02,733 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:02,733 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:04:02,733 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,733 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:02,733 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:02,734 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2021-10-28 23:04:02,734 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:02,734 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:02,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:02,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:02,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:02,806 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:02,806 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:04:02,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:02,808 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:02,810 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:02,810 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:02,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 23:04:02,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:02,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:02,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:02,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:04:02,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:02,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 23:04:03,188 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:04:03,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-28 23:04:03,192 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:03,192 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:03,192 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:03,192 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:03,192 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:04:03,193 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,193 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:03,193 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:03,193 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2021-10-28 23:04:03,193 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:03,193 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:03,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,285 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:03,285 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:04:03,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,289 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,294 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 [2021-10-28 23:04:03,304 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:03,304 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:04:03,304 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:03,304 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:03,304 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:03,306 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:04:03,306 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:04:03,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 23:04:03,316 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:04:03,330 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:04:03,330 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:04:03,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,332 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,336 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:04:03,336 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:04:03,336 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:04:03,336 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-10-28 23:04:03,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 23:04:03,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:03,373 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:04:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:04:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:03,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:04:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:03,445 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 [2021-10-28 23:04:03,445 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) [2021-10-28 23:04:03,486 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. [2021-10-28 23:04:03,491 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 [2021-10-28 23:04:03,491 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) [2021-10-28 23:04:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-28 23:04:03,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2021-10-28 23:04:03,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:03,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2021-10-28 23:04:03,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:03,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2021-10-28 23:04:03,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:03,493 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2021-10-28 23:04:03,496 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2021-10-28 23:04:03,497 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2021-10-28 23:04:03,497 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-10-28 23:04:03,498 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2021-10-28 23:04:03,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2021-10-28 23:04:03,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:03,498 INFO L681 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2021-10-28 23:04:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2021-10-28 23:04:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-10-28 23:04:03,502 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) [2021-10-28 23:04:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2021-10-28 23:04:03,504 INFO L704 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2021-10-28 23:04:03,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:04:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:04:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:04:03,507 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) [2021-10-28 23:04:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:04:03,522 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-10-28 23:04:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:04:03,525 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2021-10-28 23:04:03,526 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2021-10-28 23:04:03,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2021-10-28 23:04:03,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-10-28 23:04:03,528 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2021-10-28 23:04:03,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2021-10-28 23:04:03,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:03,528 INFO L681 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-10-28 23:04:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2021-10-28 23:04:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-10-28 23:04:03,532 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) [2021-10-28 23:04:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2021-10-28 23:04:03,533 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2021-10-28 23:04:03,533 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2021-10-28 23:04:03,533 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:04:03,533 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2021-10-28 23:04:03,534 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2021-10-28 23:04:03,534 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:04:03,534 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:04:03,535 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-10-28 23:04:03,535 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:04:03,535 INFO L791 eck$LassoCheckResult]: Stem: 543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 544#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 552#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 571#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 572#L14 assume !(main_~i~0 < main_~j~0); 578#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 539#L19-2 [2021-10-28 23:04:03,535 INFO L793 eck$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 [2021-10-28 23:04:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2021-10-28 23:04:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:03,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649156695] [2021-10-28 23:04:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:03,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:03,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:04:03,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649156695] [2021-10-28 23:04:03,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649156695] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:04:03,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:04:03,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:04:03,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393442345] [2021-10-28 23:04:03,580 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:04:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:03,581 INFO L85 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2021-10-28 23:04:03,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:03,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403657736] [2021-10-28 23:04:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:03,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:03,585 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:03,588 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:03,618 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:03,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:03,618 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:03,618 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:03,618 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:04:03,618 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,618 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:03,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:03,619 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2021-10-28 23:04:03,619 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:03,619 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:03,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,680 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:03,680 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:04:03,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,681 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,683 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:04:03,683 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:03,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 23:04:03,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:03,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,749 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:04:03,751 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:04:03,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 23:04:03,829 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:04:03,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:03,832 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:04:03,832 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:04:03,832 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:04:03,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:04:03,832 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:04:03,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,832 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:04:03,832 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:04:03,832 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2021-10-28 23:04:03,832 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:04:03,832 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:04:03,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:04:03,888 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:04:03,888 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:04:03,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,889 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,891 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 [2021-10-28 23:04:03,900 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:03,900 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:03,900 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:03,900 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:03,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 23:04:03,902 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:04:03,902 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:04:03,924 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:04:03,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:03,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,959 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 23:04:03,961 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 [2021-10-28 23:04:03,968 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:04:03,968 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:04:03,968 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:04:03,968 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:04:03,968 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:04:03,969 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:04:03,969 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:04:03,980 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:04:03,992 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2021-10-28 23:04:03,992 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-10-28 23:04:03,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:04:03,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:04:03,995 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:04:03,997 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:04:03,997 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:04:03,997 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:04:03,997 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 23:04:03,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 23:04:04,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-10-28 23:04:04,017 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:04:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:04,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:04:04,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:04:04,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:04:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:04:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:04:04,096 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 [2021-10-28 23:04:04,096 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) [2021-10-28 23:04:04,116 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. [2021-10-28 23:04:04,116 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 [2021-10-28 23:04:04,117 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) [2021-10-28 23:04:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2021-10-28 23:04:04,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2021-10-28 23:04:04,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:04,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2021-10-28 23:04:04,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:04,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2021-10-28 23:04:04,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:04:04,118 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2021-10-28 23:04:04,119 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-28 23:04:04,120 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2021-10-28 23:04:04,121 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-10-28 23:04:04,121 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 23:04:04,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2021-10-28 23:04:04,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:04,121 INFO L681 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-10-28 23:04:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2021-10-28 23:04:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-10-28 23:04:04,125 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) [2021-10-28 23:04:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2021-10-28 23:04:04,127 INFO L704 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2021-10-28 23:04:04,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:04:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:04:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:04:04,127 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) [2021-10-28 23:04:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:04:04,146 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-28 23:04:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:04:04,147 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2021-10-28 23:04:04,148 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 23:04:04,149 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2021-10-28 23:04:04,152 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-10-28 23:04:04,153 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-10-28 23:04:04,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2021-10-28 23:04:04,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:04:04,153 INFO L681 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-10-28 23:04:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2021-10-28 23:04:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2021-10-28 23:04:04,159 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) [2021-10-28 23:04:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-10-28 23:04:04,160 INFO L704 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-10-28 23:04:04,160 INFO L587 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-10-28 23:04:04,160 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 23:04:04,160 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2021-10-28 23:04:04,161 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 23:04:04,163 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:04:04,163 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:04:04,164 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-10-28 23:04:04,164 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2021-10-28 23:04:04,164 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 [2021-10-28 23:04:04,164 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 [2021-10-28 23:04:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2021-10-28 23:04:04,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:04,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898516622] [2021-10-28 23:04:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:04,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:04,175 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:04,182 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2021-10-28 23:04:04,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:04,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505581851] [2021-10-28 23:04:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:04,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:04,189 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:04,200 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:04:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2021-10-28 23:04:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:04:04,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918790221] [2021-10-28 23:04:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:04:04,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:04:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:04,223 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:04:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:04:04,238 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:04:04,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:04:04 BoogieIcfgContainer [2021-10-28 23:04:04,394 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:04:04,395 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:04:04,395 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:04:04,395 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:04:04,395 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:03:59" (3/4) ... [2021-10-28 23:04:04,398 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 23:04:04,432 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:04:04,432 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:04:04,433 INFO L168 Benchmark]: Toolchain (without parser) took 5743.89 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 96.2 MB in the beginning and 70.4 MB in the end (delta: 25.8 MB). Peak memory consumption was 74.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:04:04,434 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 121.6 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:04:04,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.71 ms. Allocated memory is still 121.6 MB. Free memory was 95.9 MB in the beginning and 97.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:04:04,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.26 ms. Allocated memory is still 121.6 MB. Free memory was 97.7 MB in the beginning and 96.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:04:04,435 INFO L168 Benchmark]: Boogie Preprocessor took 13.40 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 95.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:04:04,436 INFO L168 Benchmark]: RCFGBuilder took 218.93 ms. Allocated memory is still 121.6 MB. Free memory was 95.4 MB in the beginning and 87.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:04:04,436 INFO L168 Benchmark]: BuchiAutomizer took 5217.80 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 87.4 MB in the beginning and 72.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 63.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:04:04,437 INFO L168 Benchmark]: Witness Printer took 37.32 ms. Allocated memory is still 169.9 MB. Free memory was 72.4 MB in the beginning and 70.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:04:04,439 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 121.6 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 216.71 ms. Allocated memory is still 121.6 MB. Free memory was 95.9 MB in the beginning and 97.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.26 ms. Allocated memory is still 121.6 MB. Free memory was 97.7 MB in the beginning and 96.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.40 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 95.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 218.93 ms. Allocated memory is still 121.6 MB. Free memory was 95.4 MB in the beginning and 87.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5217.80 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 87.4 MB in the beginning and 72.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 63.8 MB. Max. memory is 16.1 GB. * Witness Printer took 37.32 ms. Allocated memory is still 169.9 MB. Free memory was 72.4 MB in the beginning and 70.4 MB in the end (delta: 2.0 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 5.1s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 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: 58ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.6s - 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@330fde3b=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@b04878c=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! [2021-10-28 23:04:04,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:04:04,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-10-28 23:04:04,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd579eb-22d0-479a-9caf-413b06c9e02b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...