./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Flip2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:20:10,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:20:10,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:20:10,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:20:10,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:20:10,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:20:10,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:20:10,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:20:10,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:20:10,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:20:10,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:20:10,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:20:10,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:20:10,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:20:10,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:20:10,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:20:10,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:20:10,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:20:10,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:20:10,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:20:10,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:20:10,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:20:10,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:20:10,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:20:10,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:20:10,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:20:10,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:20:10,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:20:10,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:20:10,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:20:10,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:20:10,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:20:10,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:20:10,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:20:10,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:20:10,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:20:10,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:20:10,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:20:10,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:20:10,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:20:10,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:20:10,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-22 16:20:10,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:20:10,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:20:10,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:20:10,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:20:10,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:20:10,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:20:10,909 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:20:10,909 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-22 16:20:10,909 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-22 16:20:10,910 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-22 16:20:10,911 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-22 16:20:10,911 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-22 16:20:10,912 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-22 16:20:10,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:20:10,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:20:10,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:20:10,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:20:10,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-22 16:20:10,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-22 16:20:10,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-22 16:20:10,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:20:10,914 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-22 16:20:10,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:20:10,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-22 16:20:10,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:20:10,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:20:10,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:20:10,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:20:10,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:20:10,919 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-22 16:20:10,919 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_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 743a1142650cc90419737e0fcd83ae36167644025e705a99270cea90986dadac [2021-11-22 16:20:11,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:20:11,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:20:11,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:20:11,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:20:11,224 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:20:11,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/termination-restricted-15/Flip2.c [2021-11-22 16:20:11,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/data/79ae7b616/0e7d534a98514c22b842e2bf2e25e59d/FLAG3d1cd513e [2021-11-22 16:20:11,741 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:20:11,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/sv-benchmarks/c/termination-restricted-15/Flip2.c [2021-11-22 16:20:11,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/data/79ae7b616/0e7d534a98514c22b842e2bf2e25e59d/FLAG3d1cd513e [2021-11-22 16:20:12,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/data/79ae7b616/0e7d534a98514c22b842e2bf2e25e59d [2021-11-22 16:20:12,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:20:12,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:20:12,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:20:12,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:20:12,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:20:12,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b7daea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12, skipping insertion in model container [2021-11-22 16:20:12,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:20:12,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:20:12,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:20:12,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:20:12,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:20:12,377 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:20:12,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12 WrapperNode [2021-11-22 16:20:12,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:20:12,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:20:12,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:20:12,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:20:12,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,418 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2021-11-22 16:20:12,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:20:12,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:20:12,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:20:12,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:20:12,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:20:12,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:20:12,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:20:12,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:20:12,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (1/1) ... [2021-11-22 16:20:12,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:12,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:12,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:12,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-22 16:20:12,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:20:12,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:20:12,626 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:20:12,628 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:20:12,728 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:20:12,734 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:20:12,734 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 16:20:12,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:12 BoogieIcfgContainer [2021-11-22 16:20:12,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:20:12,739 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-22 16:20:12,739 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-22 16:20:12,742 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-22 16:20:12,743 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-22 16:20:12,744 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.11 04:20:12" (1/3) ... [2021-11-22 16:20:12,746 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@34e7475d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 04:20:12, skipping insertion in model container [2021-11-22 16:20:12,746 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-22 16:20:12,746 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:12" (2/3) ... [2021-11-22 16:20:12,747 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@34e7475d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 04:20:12, skipping insertion in model container [2021-11-22 16:20:12,747 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-22 16:20:12,747 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:12" (3/3) ... [2021-11-22 16:20:12,749 INFO L388 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2021-11-22 16:20:12,807 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-22 16:20:12,808 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-22 16:20:12,808 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-22 16:20:12,808 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-22 16:20:12,808 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-22 16:20:12,808 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-22 16:20:12,808 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-22 16:20:12,809 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-22 16:20:12,824 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:12,844 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-22 16:20:12,844 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:12,845 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:12,852 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-22 16:20:12,852 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-22 16:20:12,852 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-22 16:20:12,853 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:12,854 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-22 16:20:12,854 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:12,854 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:12,855 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-22 16:20:12,855 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-22 16:20:12,862 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 3#L19-2true [2021-11-22 16:20:12,862 INFO L793 eck$LassoCheckResult]: Loop: 3#L19-2true assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 10#L14true assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 3#L19-2true [2021-11-22 16:20:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-11-22 16:20:12,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:12,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101195286] [2021-11-22 16:20:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:12,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:12,942 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:12,961 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 1 times [2021-11-22 16:20:12,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071470136] [2021-11-22 16:20:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:12,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:12,979 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:12,987 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-11-22 16:20:12,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345672589] [2021-11-22 16:20:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:12,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:12,999 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:13,008 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:13,130 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:13,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:13,130 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:13,131 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:13,131 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 16:20:13,131 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:13,131 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:13,131 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:13,131 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2021-11-22 16:20:13,132 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:13,132 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:13,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:13,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:13,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:13,359 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:13,359 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 16:20:13,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:13,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:13,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:13,374 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:13,374 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:13,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-22 16:20:13,403 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:13,403 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:13,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-11-22 16:20:13,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:13,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:13,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-22 16:20:13,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:13,435 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:13,465 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:13,466 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:13,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-11-22 16:20:13,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:13,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:13,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-22 16:20:13,504 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:13,504 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:13,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:13,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:13,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:13,568 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 16:20:13,568 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:13,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-22 16:20:13,861 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-22 16:20:13,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:13,866 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:13,866 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:13,867 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:13,867 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:13,867 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-22 16:20:13,867 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:13,867 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:13,867 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:13,867 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2021-11-22 16:20:13,867 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:13,867 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:13,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:13,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:13,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:13,997 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:14,001 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-22 16:20:14,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-22 16:20:14,125 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:14,135 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:14,135 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:14,135 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:14,135 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:14,140 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-22 16:20:14,141 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-22 16:20:14,152 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 16:20:14,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-22 16:20:14,188 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:14,195 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:14,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:14,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:14,195 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:14,199 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-22 16:20:14,199 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-22 16:20:14,241 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 16:20:14,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-22 16:20:14,270 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:14,278 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:14,278 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 16:20:14,278 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:14,279 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:14,279 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:14,284 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 16:20:14,284 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 16:20:14,302 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-22 16:20:14,312 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-22 16:20:14,312 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-22 16:20:14,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,317 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-22 16:20:14,318 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-22 16:20:14,318 INFO L513 LassoAnalysis]: Proved termination. [2021-11-22 16:20:14,318 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2021-11-22 16:20:14,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-22 16:20:14,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,345 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-22 16:20:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:20:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:14,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:20:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:14,483 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-22 16:20:14,484 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:14,534 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 31 states and 44 transitions. Complement of second has 8 states. [2021-11-22 16:20:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-22 16:20:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-11-22 16:20:14,543 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 2 letters. Loop has 2 letters. [2021-11-22 16:20:14,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:14,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 4 letters. Loop has 2 letters. [2021-11-22 16:20:14,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:14,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 2 letters. Loop has 4 letters. [2021-11-22 16:20:14,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:14,545 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 44 transitions. [2021-11-22 16:20:14,549 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-22 16:20:14,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 20 transitions. [2021-11-22 16:20:14,554 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-11-22 16:20:14,554 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-11-22 16:20:14,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2021-11-22 16:20:14,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:14,555 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-11-22 16:20:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2021-11-22 16:20:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-22 16:20:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2021-11-22 16:20:14,579 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-11-22 16:20:14,579 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-11-22 16:20:14,579 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-22 16:20:14,579 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 19 transitions. [2021-11-22 16:20:14,580 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-22 16:20:14,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:14,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:14,581 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-22 16:20:14,581 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-22 16:20:14,581 INFO L791 eck$LassoCheckResult]: Stem: 84#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 85#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 86#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 81#L14 [2021-11-22 16:20:14,581 INFO L793 eck$LassoCheckResult]: Loop: 81#L14 assume !(main_~i~0#1 < main_~j~0#1); 90#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 80#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 81#L14 [2021-11-22 16:20:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-11-22 16:20:14,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246892293] [2021-11-22 16:20:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:14,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:14,588 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:14,592 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 45829, now seen corresponding path program 1 times [2021-11-22 16:20:14,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:14,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604333617] [2021-11-22 16:20:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:14,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:14,600 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:14,611 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 889694462, now seen corresponding path program 1 times [2021-11-22 16:20:14,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183317053] [2021-11-22 16:20:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:14,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:14,631 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:14,638 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:14,686 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:14,686 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:14,686 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:14,686 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:14,687 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 16:20:14,687 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,687 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:14,687 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:14,687 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2021-11-22 16:20:14,687 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:14,687 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:14,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:14,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:14,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:14,761 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:14,761 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 16:20:14,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,770 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:14,771 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:14,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-22 16:20:14,798 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:14,798 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:14,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:14,870 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:14,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-22 16:20:14,889 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:14,890 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:14,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,917 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-22 16:20:14,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:14,919 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:14,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:14,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:14,953 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:14,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-22 16:20:14,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 16:20:14,954 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:15,097 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-22 16:20:15,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,100 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:15,100 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:15,100 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:15,100 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:15,100 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-22 16:20:15,100 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,100 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:15,101 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:15,101 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2021-11-22 16:20:15,101 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:15,101 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:15,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:15,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:15,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:15,165 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:15,165 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-22 16:20:15,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,178 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:15,191 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:15,191 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:15,191 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:15,191 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:15,198 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-22 16:20:15,198 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-22 16:20:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-22 16:20:15,213 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 16:20:15,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,256 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:15,265 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:15,265 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:15,266 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:15,266 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:15,276 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-22 16:20:15,276 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-22 16:20:15,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-22 16:20:15,292 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 16:20:15,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-11-22 16:20:15,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,314 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-22 16:20:15,317 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:15,324 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:15,324 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 16:20:15,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:15,324 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:15,324 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:15,326 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 16:20:15,327 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 16:20:15,337 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-22 16:20:15,348 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-11-22 16:20:15,348 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-11-22 16:20:15,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,386 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-22 16:20:15,386 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-22 16:20:15,386 INFO L513 LassoAnalysis]: Proved termination. [2021-11-22 16:20:15,386 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2021-11-22 16:20:15,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-22 16:20:15,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,422 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-22 16:20:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:20:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:15,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:20:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:15,491 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-22 16:20:15,492 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:15,523 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 19 transitions. cyclomatic complexity: 9. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 35 states and 50 transitions. Complement of second has 7 states. [2021-11-22 16:20:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-22 16:20:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2021-11-22 16:20:15,527 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 3 letters. [2021-11-22 16:20:15,527 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:15,528 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 6 letters. Loop has 3 letters. [2021-11-22 16:20:15,528 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:15,528 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 3 letters. Loop has 6 letters. [2021-11-22 16:20:15,529 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:15,529 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 50 transitions. [2021-11-22 16:20:15,531 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-11-22 16:20:15,532 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 31 states and 45 transitions. [2021-11-22 16:20:15,533 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-11-22 16:20:15,533 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-11-22 16:20:15,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 45 transitions. [2021-11-22 16:20:15,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:15,534 INFO L681 BuchiCegarLoop]: Abstraction has 31 states and 45 transitions. [2021-11-22 16:20:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 45 transitions. [2021-11-22 16:20:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-11-22 16:20:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 38 transitions. [2021-11-22 16:20:15,538 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 38 transitions. [2021-11-22 16:20:15,539 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 38 transitions. [2021-11-22 16:20:15,539 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-22 16:20:15,539 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 38 transitions. [2021-11-22 16:20:15,540 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2021-11-22 16:20:15,540 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:15,540 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:15,541 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-22 16:20:15,541 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-22 16:20:15,541 INFO L791 eck$LassoCheckResult]: Stem: 174#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 175#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 180#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 184#L14 assume !(main_~i~0#1 < main_~j~0#1); 176#L19 [2021-11-22 16:20:15,541 INFO L793 eck$LassoCheckResult]: Loop: 176#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 177#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 190#L14 assume !(main_~i~0#1 < main_~j~0#1); 176#L19 [2021-11-22 16:20:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash 925800, now seen corresponding path program 1 times [2021-11-22 16:20:15,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410121966] [2021-11-22 16:20:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:15,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:15,548 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:15,552 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash 48407, now seen corresponding path program 1 times [2021-11-22 16:20:15,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:15,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811930901] [2021-11-22 16:20:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:15,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:15,561 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:15,567 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1810722640, now seen corresponding path program 1 times [2021-11-22 16:20:15,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:15,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569099936] [2021-11-22 16:20:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:15,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:15,577 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:15,585 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:15,618 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:15,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:15,618 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:15,618 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:15,619 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 16:20:15,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:15,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:15,620 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2021-11-22 16:20:15,620 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:15,620 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:15,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:15,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:15,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:15,720 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:15,720 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 16:20:15,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,724 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,752 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:15,752 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:15,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-22 16:20:15,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-11-22 16:20:15,769 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:15,769 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:15,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,797 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-22 16:20:15,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:15,800 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:15,813 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:15,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:15,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-11-22 16:20:15,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,842 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-22 16:20:15,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:15,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:15,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,903 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-22 16:20:15,904 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 16:20:15,904 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:16,094 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-22 16:20:16,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:16,097 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:16,097 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:16,097 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:16,097 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:16,097 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-22 16:20:16,097 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,098 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:16,098 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:16,098 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2021-11-22 16:20:16,098 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:16,098 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:16,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:16,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:16,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:16,158 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:16,159 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-22 16:20:16,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,160 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,182 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:16,191 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:16,191 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:16,191 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:16,191 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:16,194 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-22 16:20:16,194 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-22 16:20:16,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-22 16:20:16,205 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 16:20:16,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:16,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,239 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,246 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:16,255 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:16,255 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 16:20:16,255 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:16,255 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:16,256 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:16,257 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 16:20:16,257 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 16:20:16,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-22 16:20:16,273 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-22 16:20:16,278 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-11-22 16:20:16,278 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-22 16:20:16,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,279 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,281 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-22 16:20:16,281 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-22 16:20:16,281 INFO L513 LassoAnalysis]: Proved termination. [2021-11-22 16:20:16,281 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~i~0#1 - 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2021-11-22 16:20:16,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-22 16:20:16,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:16,319 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-22 16:20:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:20:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:16,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:20:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:16,413 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-22 16:20:16,414 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 38 transitions. cyclomatic complexity: 19 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:16,433 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 38 transitions. cyclomatic complexity: 19. 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 63 states and 92 transitions. Complement of second has 5 states. [2021-11-22 16:20:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-22 16:20:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2021-11-22 16:20:16,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2021-11-22 16:20:16,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:16,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-22 16:20:16,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:16,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2021-11-22 16:20:16,437 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:16,437 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 92 transitions. [2021-11-22 16:20:16,440 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2021-11-22 16:20:16,441 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 56 states and 81 transitions. [2021-11-22 16:20:16,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-11-22 16:20:16,442 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2021-11-22 16:20:16,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 81 transitions. [2021-11-22 16:20:16,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:16,442 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 81 transitions. [2021-11-22 16:20:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 81 transitions. [2021-11-22 16:20:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2021-11-22 16:20:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 61 transitions. [2021-11-22 16:20:16,447 INFO L704 BuchiCegarLoop]: Abstraction has 42 states and 61 transitions. [2021-11-22 16:20:16,448 INFO L587 BuchiCegarLoop]: Abstraction has 42 states and 61 transitions. [2021-11-22 16:20:16,448 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-22 16:20:16,448 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 61 transitions. [2021-11-22 16:20:16,449 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2021-11-22 16:20:16,450 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:16,450 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:16,450 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2021-11-22 16:20:16,450 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-22 16:20:16,451 INFO L791 eck$LassoCheckResult]: Stem: 304#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 305#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 309#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 332#L14 assume !(main_~i~0#1 < main_~j~0#1); 306#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 307#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 318#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 315#L19-2 [2021-11-22 16:20:16,451 INFO L793 eck$LassoCheckResult]: Loop: 315#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 325#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 315#L19-2 [2021-11-22 16:20:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1810722638, now seen corresponding path program 1 times [2021-11-22 16:20:16,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:16,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823644473] [2021-11-22 16:20:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:16,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:16,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823644473] [2021-11-22 16:20:16,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823644473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:16,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:16,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:20:16,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145913723] [2021-11-22 16:20:16,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:16,517 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-22 16:20:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:16,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 2 times [2021-11-22 16:20:16,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:16,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321378698] [2021-11-22 16:20:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:16,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:16,533 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:16,538 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:16,584 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:16,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:16,585 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:16,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:16,585 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 16:20:16,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:16,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:16,586 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2021-11-22 16:20:16,586 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:16,586 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:16,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:16,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:16,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:16,657 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:16,658 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 16:20:16,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,659 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,665 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:16,665 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:16,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-22 16:20:16,693 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:16,694 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:16,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:16,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,735 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,738 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:16,738 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:16,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-11-22 16:20:16,757 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-22 16:20:16,758 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-22 16:20:16,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:16,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,795 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,797 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:16,797 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:16,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-22 16:20:16,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-11-22 16:20:16,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:16,835 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:16,843 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 16:20:16,843 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:16,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-22 16:20:17,123 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-22 16:20:17,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:17,128 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:17,128 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:17,128 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:17,129 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:17,129 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-22 16:20:17,129 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,129 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:17,129 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:17,129 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2021-11-22 16:20:17,129 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:17,129 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:17,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,206 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:17,206 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-22 16:20:17,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,208 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,215 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:17,224 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:17,224 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 16:20:17,224 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:17,224 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:17,225 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:17,231 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 16:20:17,231 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 16:20:17,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-22 16:20:17,241 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-22 16:20:17,255 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-22 16:20:17,255 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-22 16:20:17,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,256 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,258 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-22 16:20:17,258 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-22 16:20:17,258 INFO L513 LassoAnalysis]: Proved termination. [2021-11-22 16:20:17,258 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0#1) = 1*ULTIMATE.start_main_~j~0#1 Supporting invariants [] [2021-11-22 16:20:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-22 16:20:17,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-11-22 16:20:17,291 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-22 16:20:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:20:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:17,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:20:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:17,360 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-22 16:20:17,361 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 61 transitions. cyclomatic complexity: 29 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:17,395 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 61 transitions. cyclomatic complexity: 29. 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 74 states and 105 transitions. Complement of second has 7 states. [2021-11-22 16:20:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-22 16:20:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2021-11-22 16:20:17,398 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 7 letters. Loop has 2 letters. [2021-11-22 16:20:17,399 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:17,399 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 9 letters. Loop has 2 letters. [2021-11-22 16:20:17,399 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:17,399 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 7 letters. Loop has 4 letters. [2021-11-22 16:20:17,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:17,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 105 transitions. [2021-11-22 16:20:17,407 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2021-11-22 16:20:17,408 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 58 states and 84 transitions. [2021-11-22 16:20:17,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2021-11-22 16:20:17,409 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-11-22 16:20:17,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 84 transitions. [2021-11-22 16:20:17,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:17,409 INFO L681 BuchiCegarLoop]: Abstraction has 58 states and 84 transitions. [2021-11-22 16:20:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 84 transitions. [2021-11-22 16:20:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-11-22 16:20:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 42 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2021-11-22 16:20:17,414 INFO L704 BuchiCegarLoop]: Abstraction has 43 states and 63 transitions. [2021-11-22 16:20:17,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:17,419 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:17,433 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-11-22 16:20:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:17,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 69 transitions. [2021-11-22 16:20:17,436 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 14 [2021-11-22 16:20:17,437 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 45 states and 62 transitions. [2021-11-22 16:20:17,437 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-11-22 16:20:17,438 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2021-11-22 16:20:17,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 62 transitions. [2021-11-22 16:20:17,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:17,438 INFO L681 BuchiCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-11-22 16:20:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 62 transitions. [2021-11-22 16:20:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-11-22 16:20:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 40 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2021-11-22 16:20:17,443 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 58 transitions. [2021-11-22 16:20:17,443 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 58 transitions. [2021-11-22 16:20:17,443 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-22 16:20:17,443 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 58 transitions. [2021-11-22 16:20:17,444 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 14 [2021-11-22 16:20:17,444 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:17,444 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:17,445 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2021-11-22 16:20:17,445 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-22 16:20:17,445 INFO L791 eck$LassoCheckResult]: Stem: 563#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 564#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 568#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 574#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 598#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 569#L14 assume !(main_~i~0#1 < main_~j~0#1); 570#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 566#L19-2 [2021-11-22 16:20:17,445 INFO L793 eck$LassoCheckResult]: Loop: 566#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 597#L14 assume !(main_~i~0#1 < main_~j~0#1); 565#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 566#L19-2 [2021-11-22 16:20:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1810655530, now seen corresponding path program 1 times [2021-11-22 16:20:17,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022214933] [2021-11-22 16:20:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:17,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:17,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022214933] [2021-11-22 16:20:17,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022214933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:17,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:17,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:20:17,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996926748] [2021-11-22 16:20:17,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:17,469 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-22 16:20:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash 40879, now seen corresponding path program 2 times [2021-11-22 16:20:17,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:17,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201934776] [2021-11-22 16:20:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:17,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:17,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:17,515 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:17,518 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:17,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:17,563 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:17,563 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:17,563 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:17,563 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:17,563 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-22 16:20:17,563 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,563 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:17,563 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:17,563 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2021-11-22 16:20:17,563 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:17,563 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:17,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,606 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:17,606 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-22 16:20:17,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,612 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-11-22 16:20:17,617 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-22 16:20:17,617 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:17,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-11-22 16:20:17,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,648 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-22 16:20:17,651 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-22 16:20:17,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-22 16:20:17,763 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-22 16:20:17,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-11-22 16:20:17,766 INFO L210 LassoAnalysis]: Preferences: [2021-11-22 16:20:17,766 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-22 16:20:17,767 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-22 16:20:17,767 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-22 16:20:17,767 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-22 16:20:17,767 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,767 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-22 16:20:17,767 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-22 16:20:17,767 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2021-11-22 16:20:17,767 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-22 16:20:17,767 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-22 16:20:17,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-22 16:20:17,821 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-22 16:20:17,821 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-22 16:20:17,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,839 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,870 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:17,879 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:17,879 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:17,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:17,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:17,882 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-22 16:20:17,882 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-22 16:20:17,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-11-22 16:20:17,893 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-22 16:20:17,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:17,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,921 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-11-22 16:20:17,923 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-22 16:20:17,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-22 16:20:17,931 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-22 16:20:17,931 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-22 16:20:17,931 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-22 16:20:17,931 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-22 16:20:17,932 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-22 16:20:17,932 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-22 16:20:17,946 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-22 16:20:17,953 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2021-11-22 16:20:17,953 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-11-22 16:20:17,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-22 16:20:17,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:17,965 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:17,967 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-22 16:20:17,967 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-22 16:20:17,967 INFO L513 LassoAnalysis]: Proved termination. [2021-11-22 16:20:17,967 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2021-11-22 16:20:17,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-22 16:20:18,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-11-22 16:20:18,000 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-22 16:20:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:18,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:20:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:18,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:20:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:18,066 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-11-22 16:20:18,067 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 58 transitions. cyclomatic complexity: 25 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:18,092 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 58 transitions. cyclomatic complexity: 25. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 74 states and 102 transitions. Complement of second has 5 states. [2021-11-22 16:20:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-22 16:20:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2021-11-22 16:20:18,095 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-22 16:20:18,096 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:18,096 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 3 letters. [2021-11-22 16:20:18,096 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:18,096 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 7 letters. Loop has 6 letters. [2021-11-22 16:20:18,096 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-22 16:20:18,097 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 102 transitions. [2021-11-22 16:20:18,098 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-11-22 16:20:18,099 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 57 states and 79 transitions. [2021-11-22 16:20:18,100 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-11-22 16:20:18,100 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-11-22 16:20:18,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 79 transitions. [2021-11-22 16:20:18,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:18,100 INFO L681 BuchiCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-11-22 16:20:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 79 transitions. [2021-11-22 16:20:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-11-22 16:20:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-11-22 16:20:18,105 INFO L704 BuchiCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-11-22 16:20:18,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:18,106 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:18,116 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-11-22 16:20:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:18,118 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 66 transitions. [2021-11-22 16:20:18,119 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-22 16:20:18,119 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 47 states and 61 transitions. [2021-11-22 16:20:18,120 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2021-11-22 16:20:18,120 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-11-22 16:20:18,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 61 transitions. [2021-11-22 16:20:18,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-22 16:20:18,120 INFO L681 BuchiCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-11-22 16:20:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 61 transitions. [2021-11-22 16:20:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-11-22 16:20:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-11-22 16:20:18,124 INFO L704 BuchiCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-11-22 16:20:18,124 INFO L587 BuchiCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-11-22 16:20:18,124 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-22 16:20:18,124 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 47 transitions. [2021-11-22 16:20:18,125 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-22 16:20:18,125 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-22 16:20:18,125 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-22 16:20:18,126 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2021-11-22 16:20:18,126 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2021-11-22 16:20:18,126 INFO L791 eck$LassoCheckResult]: Stem: 828#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 829#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~i~0#1, main_~j~0#1, main_~t~0#1;havoc main_~i~0#1;havoc main_~j~0#1;havoc main_~t~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~j~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~t~0#1 := 0; 830#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 841#L14 assume !(main_~i~0#1 < main_~j~0#1); 837#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 852#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 835#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 824#L19-2 [2021-11-22 16:20:18,126 INFO L793 eck$LassoCheckResult]: Loop: 824#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 825#L14 assume !(main_~i~0#1 < main_~j~0#1); 831#L19 assume main_~i~0#1 > main_~j~0#1;main_~j~0#1 := main_~i~0#1; 832#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 858#L14 assume !(main_~i~0#1 < main_~j~0#1); 855#L19 assume !(main_~i~0#1 > main_~j~0#1);main_~i~0#1 := main_~i~0#1 - 1; 856#L19-2 assume !!(main_~i~0#1 > 0 && main_~j~0#1 > 0); 857#L14 assume main_~i~0#1 < main_~j~0#1;main_~t~0#1 := main_~i~0#1;main_~i~0#1 := main_~j~0#1;main_~j~0#1 := main_~t~0#1; 824#L19-2 [2021-11-22 16:20:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1810724560, now seen corresponding path program 2 times [2021-11-22 16:20:18,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214080369] [2021-11-22 16:20:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:18,133 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:18,139 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2053356838, now seen corresponding path program 1 times [2021-11-22 16:20:18,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657661353] [2021-11-22 16:20:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:18,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:18,147 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:18,153 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 399570165, now seen corresponding path program 1 times [2021-11-22 16:20:18,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514525669] [2021-11-22 16:20:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:18,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:18,169 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:20:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:20:18,189 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:20:18,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.11 04:20:18 BoogieIcfgContainer [2021-11-22 16:20:18,325 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-22 16:20:18,325 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 16:20:18,326 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 16:20:18,326 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 16:20:18,326 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:12" (3/4) ... [2021-11-22 16:20:18,328 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-11-22 16:20:18,355 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 16:20:18,355 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 16:20:18,356 INFO L158 Benchmark]: Toolchain (without parser) took 6225.51ms. Allocated memory was 81.8MB in the beginning and 100.7MB in the end (delta: 18.9MB). Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.0MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. [2021-11-22 16:20:18,356 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 81.8MB. Free memory is still 60.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:20:18,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.54ms. Allocated memory was 81.8MB in the beginning and 100.7MB in the end (delta: 18.9MB). Free memory was 43.8MB in the beginning and 78.1MB in the end (delta: -34.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 16:20:18,357 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.62ms. Allocated memory is still 100.7MB. Free memory was 78.1MB in the beginning and 76.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:20:18,358 INFO L158 Benchmark]: Boogie Preprocessor took 29.35ms. Allocated memory is still 100.7MB. Free memory was 76.9MB in the beginning and 76.0MB in the end (delta: 863.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:20:18,358 INFO L158 Benchmark]: RCFGBuilder took 286.30ms. Allocated memory is still 100.7MB. Free memory was 76.0MB in the beginning and 67.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 16:20:18,359 INFO L158 Benchmark]: BuchiAutomizer took 5586.52ms. Allocated memory is still 100.7MB. Free memory was 67.6MB in the beginning and 44.0MB in the end (delta: 23.6MB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. [2021-11-22 16:20:18,359 INFO L158 Benchmark]: Witness Printer took 30.05ms. Allocated memory is still 100.7MB. Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:20:18,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 81.8MB. Free memory is still 60.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.54ms. Allocated memory was 81.8MB in the beginning and 100.7MB in the end (delta: 18.9MB). Free memory was 43.8MB in the beginning and 78.1MB in the end (delta: -34.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.62ms. Allocated memory is still 100.7MB. Free memory was 78.1MB in the beginning and 76.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.35ms. Allocated memory is still 100.7MB. Free memory was 76.9MB in the beginning and 76.0MB in the end (delta: 863.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 286.30ms. Allocated memory is still 100.7MB. Free memory was 76.0MB in the beginning and 67.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 5586.52ms. Allocated memory is still 100.7MB. Free memory was 67.6MB in the beginning and 44.0MB in the end (delta: 23.6MB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. * Witness Printer took 30.05ms. Allocated memory is still 100.7MB. Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 -1 * j + i 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 35 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.5s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. 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 42 states and ocurred in iteration 3. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 47 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 80 IncrementalHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 39 mSDtfsCounter, 80 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown 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: 149ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.5s - 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 {j=1, i=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6d332139=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@558f7d6f=0, t=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-11-22 16:20:18,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:18,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2073ecba-5b4e-4258-a4d6-dd1770ae2948/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)