./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/java_Nested.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/java_Nested.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer --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 0baccb6c9a05802d446420fb16b8e65dc76eab5e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:16:45,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:16:45,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:16:45,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:16:45,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:16:45,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:16:45,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:16:45,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:16:45,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:16:45,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:16:45,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:16:45,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:16:45,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:16:45,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:16:45,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:16:45,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:16:45,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:16:45,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:16:45,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:16:45,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:16:45,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:16:45,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:16:45,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:16:45,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:16:45,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:16:45,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:16:45,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:16:45,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:16:45,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:16:45,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:16:45,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:16:45,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:16:45,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:16:45,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:16:45,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:16:45,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:16:45,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:16:45,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:16:45,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:16:45,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:16:45,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:16:45,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 19:16:45,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:16:45,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:16:45,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:16:45,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:16:45,948 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:16:45,949 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 19:16:45,949 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 19:16:45,949 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 19:16:45,949 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 19:16:45,949 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 19:16:45,949 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 19:16:45,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:16:45,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:16:45,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:16:45,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:16:45,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 19:16:45,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 19:16:45,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 19:16:45,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:16:45,951 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 19:16:45,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:16:45,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 19:16:45,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:16:45,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:16:45,952 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 19:16:45,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:16:45,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:16:45,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:16:45,953 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 19:16:45,954 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 19:16:45,954 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-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0baccb6c9a05802d446420fb16b8e65dc76eab5e [2020-11-29 19:16:46,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:16:46,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:16:46,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:16:46,216 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:16:46,216 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:16:46,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/java_Nested.c [2020-11-29 19:16:46,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/data/0524054ae/df1beb9773db49d1bdb6e76d3a25f6aa/FLAGda404d4e4 [2020-11-29 19:16:46,699 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:16:46,700 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/sv-benchmarks/c/termination-restricted-15/java_Nested.c [2020-11-29 19:16:46,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/data/0524054ae/df1beb9773db49d1bdb6e76d3a25f6aa/FLAGda404d4e4 [2020-11-29 19:16:47,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/data/0524054ae/df1beb9773db49d1bdb6e76d3a25f6aa [2020-11-29 19:16:47,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:16:47,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:16:47,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:16:47,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:16:47,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:16:47,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bdeaf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47, skipping insertion in model container [2020-11-29 19:16:47,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:16:47,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:16:47,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:16:47,283 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:16:47,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:16:47,338 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:16:47,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47 WrapperNode [2020-11-29 19:16:47,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:16:47,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:16:47,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:16:47,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:16:47,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:16:47,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:16:47,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:16:47,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:16:47,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... [2020-11-29 19:16:47,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:16:47,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:16:47,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:16:47,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:16:47,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:47,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:16:47,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:16:47,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:16:47,644 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:16:47,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:16:47 BoogieIcfgContainer [2020-11-29 19:16:47,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:16:47,647 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 19:16:47,647 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 19:16:47,651 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 19:16:47,652 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:16:47,652 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 07:16:47" (1/3) ... [2020-11-29 19:16:47,653 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@393a2b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:16:47, skipping insertion in model container [2020-11-29 19:16:47,653 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:16:47,654 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:16:47" (2/3) ... [2020-11-29 19:16:47,654 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@393a2b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:16:47, skipping insertion in model container [2020-11-29 19:16:47,654 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:16:47,655 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:16:47" (3/3) ... [2020-11-29 19:16:47,656 INFO L373 chiAutomizerObserver]: Analyzing ICFG java_Nested.c [2020-11-29 19:16:47,723 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 19:16:47,723 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 19:16:47,723 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 19:16:47,723 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:16:47,723 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:16:47,723 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 19:16:47,724 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:16:47,724 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 19:16:47,736 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:16:47,753 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:16:47,754 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:47,754 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:47,759 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:47,759 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:16:47,760 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 19:16:47,760 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:16:47,761 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:16:47,762 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:47,762 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:47,762 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:47,762 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:16:47,769 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 7#L10-2true [2020-11-29 19:16:47,770 INFO L796 eck$LassoCheckResult]: Loop: 7#L10-2true assume !!(main_~i~0 < 10);main_~j~0 := 3; 3#L12-2true assume !(main_~j~0 < 12); 10#L12-3true main_~i~0 := 1 + main_~i~0; 7#L10-2true [2020-11-29 19:16:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 19:16:47,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:47,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121705267] [2020-11-29 19:16:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:47,867 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:47,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:47,882 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-29 19:16:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105389794] [2020-11-29 19:16:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:47,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105389794] [2020-11-29 19:16:47,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:16:47,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:16:47,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775662941] [2020-11-29 19:16:47,958 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:47,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:16:47,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:16:47,976 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-11-29 19:16:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:48,002 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-29 19:16:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:16:48,004 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-29 19:16:48,005 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 19:16:48,008 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2020-11-29 19:16:48,009 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-11-29 19:16:48,009 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-29 19:16:48,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2020-11-29 19:16:48,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:48,010 INFO L691 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-29 19:16:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2020-11-29 19:16:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-11-29 19:16:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 19:16:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2020-11-29 19:16:48,038 INFO L714 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-29 19:16:48,038 INFO L594 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-29 19:16:48,038 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 19:16:48,039 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2020-11-29 19:16:48,039 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 19:16:48,040 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:48,040 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:48,040 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:48,040 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 19:16:48,041 INFO L794 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 29#L10-2 [2020-11-29 19:16:48,041 INFO L796 eck$LassoCheckResult]: Loop: 29#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 26#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 27#L12-2 assume !(main_~j~0 < 12); 30#L12-3 main_~i~0 := 1 + main_~i~0; 29#L10-2 [2020-11-29 19:16:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-29 19:16:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502103436] [2020-11-29 19:16:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,074 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,075 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2020-11-29 19:16:48,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983307846] [2020-11-29 19:16:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983307846] [2020-11-29 19:16:48,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841278358] [2020-11-29 19:16:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:16:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:48,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-29 19:16:48,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621240714] [2020-11-29 19:16:48,327 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:48,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:16:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:16:48,328 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2020-11-29 19:16:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:48,346 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2020-11-29 19:16:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:16:48,348 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2020-11-29 19:16:48,348 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 19:16:48,349 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2020-11-29 19:16:48,349 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-29 19:16:48,349 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-11-29 19:16:48,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2020-11-29 19:16:48,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:48,349 INFO L691 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 19:16:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2020-11-29 19:16:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-29 19:16:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 19:16:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-11-29 19:16:48,351 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 19:16:48,351 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-29 19:16:48,351 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 19:16:48,351 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-11-29 19:16:48,352 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 19:16:48,352 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:48,352 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:48,352 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:48,352 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2020-11-29 19:16:48,352 INFO L794 eck$LassoCheckResult]: Stem: 55#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 56#L10-2 [2020-11-29 19:16:48,352 INFO L796 eck$LassoCheckResult]: Loop: 56#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 53#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 54#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 58#L12-2 assume !(main_~j~0 < 12); 57#L12-3 main_~i~0 := 1 + main_~i~0; 56#L10-2 [2020-11-29 19:16:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-11-29 19:16:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566595208] [2020-11-29 19:16:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,386 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2020-11-29 19:16:48,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415285987] [2020-11-29 19:16:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415285987] [2020-11-29 19:16:48,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639937108] [2020-11-29 19:16:48,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:16:48,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:16:48,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:16:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:16:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:48,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-29 19:16:48,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15796289] [2020-11-29 19:16:48,508 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:48,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:16:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:16:48,509 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2020-11-29 19:16:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:48,530 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2020-11-29 19:16:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:16:48,531 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2020-11-29 19:16:48,532 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 19:16:48,532 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2020-11-29 19:16:48,532 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-29 19:16:48,532 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-29 19:16:48,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-11-29 19:16:48,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:48,533 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 19:16:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-11-29 19:16:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 19:16:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 19:16:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-29 19:16:48,534 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 19:16:48,534 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 19:16:48,534 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 19:16:48,535 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-11-29 19:16:48,535 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 19:16:48,535 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:48,535 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:48,536 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:48,536 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2020-11-29 19:16:48,536 INFO L794 eck$LassoCheckResult]: Stem: 88#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 89#L10-2 [2020-11-29 19:16:48,536 INFO L796 eck$LassoCheckResult]: Loop: 89#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 86#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 87#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 92#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 91#L12-2 assume !(main_~j~0 < 12); 90#L12-3 main_~i~0 := 1 + main_~i~0; 89#L10-2 [2020-11-29 19:16:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2020-11-29 19:16:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875183278] [2020-11-29 19:16:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,544 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,545 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2020-11-29 19:16:48,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393245397] [2020-11-29 19:16:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393245397] [2020-11-29 19:16:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172509432] [2020-11-29 19:16:48,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:48,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 19:16:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:16:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:16:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:48,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 19:16:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133690433] [2020-11-29 19:16:48,675 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:48,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:16:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:16:48,676 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-11-29 19:16:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:48,694 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-11-29 19:16:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:16:48,695 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-11-29 19:16:48,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:16:48,696 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2020-11-29 19:16:48,696 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 19:16:48,696 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 19:16:48,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-11-29 19:16:48,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:48,697 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:16:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-11-29 19:16:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-29 19:16:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 19:16:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-29 19:16:48,698 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:16:48,698 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:16:48,699 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 19:16:48,699 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-11-29 19:16:48,699 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:16:48,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:48,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:48,700 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:48,700 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2020-11-29 19:16:48,700 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 128#L10-2 [2020-11-29 19:16:48,700 INFO L796 eck$LassoCheckResult]: Loop: 128#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 125#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 126#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 132#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 131#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 130#L12-2 assume !(main_~j~0 < 12); 129#L12-3 main_~i~0 := 1 + main_~i~0; 128#L10-2 [2020-11-29 19:16:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2020-11-29 19:16:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586917761] [2020-11-29 19:16:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,708 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2020-11-29 19:16:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26649992] [2020-11-29 19:16:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26649992] [2020-11-29 19:16:48,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457214364] [2020-11-29 19:16:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:16:48,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:16:48,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:16:48,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:16:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:48,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 19:16:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258507390] [2020-11-29 19:16:48,864 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:16:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:16:48,865 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2020-11-29 19:16:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:48,896 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-29 19:16:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:16:48,897 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-29 19:16:48,898 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:16:48,898 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2020-11-29 19:16:48,898 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 19:16:48,898 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-11-29 19:16:48,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2020-11-29 19:16:48,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:48,899 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 19:16:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2020-11-29 19:16:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 19:16:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 19:16:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-29 19:16:48,900 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 19:16:48,900 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 19:16:48,901 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 19:16:48,901 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2020-11-29 19:16:48,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:16:48,901 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:48,901 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:48,902 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:48,902 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2020-11-29 19:16:48,902 INFO L794 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 173#L10-2 [2020-11-29 19:16:48,902 INFO L796 eck$LassoCheckResult]: Loop: 173#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 170#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 171#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 178#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 177#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 176#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 175#L12-2 assume !(main_~j~0 < 12); 174#L12-3 main_~i~0 := 1 + main_~i~0; 173#L10-2 [2020-11-29 19:16:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2020-11-29 19:16:48,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400904941] [2020-11-29 19:16:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:48,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:48,914 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2020-11-29 19:16:48,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:48,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75023496] [2020-11-29 19:16:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75023496] [2020-11-29 19:16:49,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726471820] [2020-11-29 19:16:49,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:49,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 19:16:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:16:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:16:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:49,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 19:16:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9635350] [2020-11-29 19:16:49,063 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:49,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:49,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:16:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:16:49,064 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2020-11-29 19:16:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:49,090 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2020-11-29 19:16:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:16:49,091 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2020-11-29 19:16:49,091 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:16:49,092 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2020-11-29 19:16:49,092 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-11-29 19:16:49,092 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-29 19:16:49,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2020-11-29 19:16:49,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:49,092 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:16:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2020-11-29 19:16:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 19:16:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:16:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-29 19:16:49,094 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:16:49,094 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 19:16:49,094 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 19:16:49,094 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-11-29 19:16:49,095 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:16:49,095 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:49,095 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:49,095 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:49,095 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2020-11-29 19:16:49,096 INFO L794 eck$LassoCheckResult]: Stem: 223#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 224#L10-2 [2020-11-29 19:16:49,096 INFO L796 eck$LassoCheckResult]: Loop: 224#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 221#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 222#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 230#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 229#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 228#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 227#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 226#L12-2 assume !(main_~j~0 < 12); 225#L12-3 main_~i~0 := 1 + main_~i~0; 224#L10-2 [2020-11-29 19:16:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2020-11-29 19:16:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:49,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440697293] [2020-11-29 19:16:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:49,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:49,102 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:49,106 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:49,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2020-11-29 19:16:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:49,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406897496] [2020-11-29 19:16:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406897496] [2020-11-29 19:16:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152045524] [2020-11-29 19:16:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:49,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 19:16:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:16:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:16:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:49,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 19:16:49,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243740840] [2020-11-29 19:16:49,440 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:16:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:16:49,441 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2020-11-29 19:16:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:49,462 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-29 19:16:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:16:49,462 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2020-11-29 19:16:49,463 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 19:16:49,463 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2020-11-29 19:16:49,463 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 19:16:49,464 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 19:16:49,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-11-29 19:16:49,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:49,464 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 19:16:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-11-29 19:16:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 19:16:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 19:16:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-29 19:16:49,466 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 19:16:49,466 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 19:16:49,466 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 19:16:49,466 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2020-11-29 19:16:49,466 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 19:16:49,466 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:49,466 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:49,467 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:49,467 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2020-11-29 19:16:49,467 INFO L794 eck$LassoCheckResult]: Stem: 280#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 281#L10-2 [2020-11-29 19:16:49,467 INFO L796 eck$LassoCheckResult]: Loop: 281#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 278#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 279#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 288#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 287#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 286#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 285#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 284#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 283#L12-2 assume !(main_~j~0 < 12); 282#L12-3 main_~i~0 := 1 + main_~i~0; 281#L10-2 [2020-11-29 19:16:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2020-11-29 19:16:49,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:49,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021649168] [2020-11-29 19:16:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:49,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:49,472 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:49,473 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:49,474 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2020-11-29 19:16:49,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:49,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234215451] [2020-11-29 19:16:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234215451] [2020-11-29 19:16:49,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439968147] [2020-11-29 19:16:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:16:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:16:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:49,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 19:16:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589229106] [2020-11-29 19:16:49,680 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:16:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:16:49,681 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2020-11-29 19:16:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:49,715 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-29 19:16:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:16:49,716 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2020-11-29 19:16:49,717 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-29 19:16:49,717 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 19:16:49,717 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-11-29 19:16:49,717 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-29 19:16:49,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2020-11-29 19:16:49,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:49,718 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:16:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2020-11-29 19:16:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 19:16:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 19:16:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 19:16:49,719 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:16:49,719 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 19:16:49,720 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 19:16:49,720 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2020-11-29 19:16:49,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-29 19:16:49,720 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:49,720 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:49,721 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:49,721 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2020-11-29 19:16:49,721 INFO L794 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 344#L10-2 [2020-11-29 19:16:49,721 INFO L796 eck$LassoCheckResult]: Loop: 344#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 341#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 342#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 352#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 351#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 350#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 349#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 348#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 347#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 346#L12-2 assume !(main_~j~0 < 12); 345#L12-3 main_~i~0 := 1 + main_~i~0; 344#L10-2 [2020-11-29 19:16:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2020-11-29 19:16:49,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:49,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317512606] [2020-11-29 19:16:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:49,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:49,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:49,726 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2020-11-29 19:16:49,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:49,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669983044] [2020-11-29 19:16:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669983044] [2020-11-29 19:16:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294906105] [2020-11-29 19:16:49,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:16:49,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:16:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:16:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:16:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:49,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:16:49,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 19:16:49,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678942945] [2020-11-29 19:16:49,939 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:16:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:16:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:16:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:16:49,940 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2020-11-29 19:16:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:16:49,995 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-29 19:16:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:16:49,997 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-11-29 19:16:49,998 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 19:16:49,998 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 19:16:49,998 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 19:16:49,998 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-11-29 19:16:49,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2020-11-29 19:16:49,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:49,999 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:16:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2020-11-29 19:16:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 19:16:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 19:16:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 19:16:50,000 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:16:50,002 INFO L594 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:16:50,002 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 19:16:50,003 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2020-11-29 19:16:50,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 19:16:50,003 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:50,003 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:50,004 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:16:50,004 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2020-11-29 19:16:50,004 INFO L794 eck$LassoCheckResult]: Stem: 412#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 413#L10-2 [2020-11-29 19:16:50,004 INFO L796 eck$LassoCheckResult]: Loop: 413#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 410#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 411#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 422#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 421#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 420#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 419#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 418#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 417#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 416#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 415#L12-2 assume !(main_~j~0 < 12); 414#L12-3 main_~i~0 := 1 + main_~i~0; 413#L10-2 [2020-11-29 19:16:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2020-11-29 19:16:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:50,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655414040] [2020-11-29 19:16:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:50,018 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:50,019 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:50,020 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2020-11-29 19:16:50,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:50,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125116034] [2020-11-29 19:16:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:50,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:50,051 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:50,060 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2020-11-29 19:16:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:50,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721312900] [2020-11-29 19:16:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:50,084 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:50,092 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:50,099 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:50,335 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-11-29 19:16:50,388 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:16:50,388 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:16:50,388 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:16:50,388 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:16:50,389 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:16:50,389 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:50,389 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:16:50,389 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:16:50,389 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration10_Loop [2020-11-29 19:16:50,389 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:16:50,390 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:16:50,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,514 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:16:50,515 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:50,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:50,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:50,535 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:50,535 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: [] Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:50,569 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:50,569 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:50,572 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:50,572 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:50,601 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:50,601 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:50,630 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:50,630 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~j~0=12} Honda state: {ULTIMATE.start_main_~j~0=12} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:50,675 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:50,675 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:50,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:16:50,730 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:50,779 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:16:50,785 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:16:50,785 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:16:50,786 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:16:50,786 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:16:50,786 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:16:50,786 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:50,786 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:16:50,786 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:16:50,786 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration10_Loop [2020-11-29 19:16:50,786 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:16:50,786 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:16:50,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:50,986 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:16:50,990 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:50,994 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:50,998 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:50,998 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:50,998 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:50,998 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,002 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:16:51,002 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:16:51,006 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,054 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:51,056 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:51,056 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:16:51,057 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:51,057 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:51,057 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,058 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:16:51,058 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,060 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,086 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:51,087 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:51,087 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:51,087 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:51,087 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,090 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:16:51,091 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:16:51,101 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,144 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:51,145 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:51,145 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:16:51,146 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:51,146 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:51,146 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,147 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:16:51,147 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:16:51,149 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,154 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:16:51,155 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,160 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:16:51,160 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:16:51,160 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:16:51,161 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 19 Supporting invariants [] Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,197 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:16:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:16:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:16:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 19:16:51,289 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 [2020-11-29 19:16:51,290 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-29 19:16:51,328 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2020-11-29 19:16:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:16:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:16:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:16:51,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2020-11-29 19:16:51,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:51,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2020-11-29 19:16:51,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:51,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2020-11-29 19:16:51,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:51,333 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2020-11-29 19:16:51,334 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:16:51,334 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2020-11-29 19:16:51,334 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 19:16:51,334 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-29 19:16:51,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2020-11-29 19:16:51,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:16:51,335 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-29 19:16:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2020-11-29 19:16:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2020-11-29 19:16:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:16:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-29 19:16:51,336 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-29 19:16:51,337 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-29 19:16:51,337 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 19:16:51,337 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2020-11-29 19:16:51,341 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:16:51,342 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:51,342 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:51,342 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 19:16:51,342 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:16:51,342 INFO L794 eck$LassoCheckResult]: Stem: 510#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 511#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 507#L12-2 [2020-11-29 19:16:51,342 INFO L796 eck$LassoCheckResult]: Loop: 507#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 507#L12-2 [2020-11-29 19:16:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 19:16:51,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:51,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735714102] [2020-11-29 19:16:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:51,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:51,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:51,361 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-29 19:16:51,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:51,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027036286] [2020-11-29 19:16:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:51,371 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:51,373 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:51,373 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-29 19:16:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:51,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072124522] [2020-11-29 19:16:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:51,377 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:51,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:51,380 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:51,400 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:16:51,400 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:16:51,401 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:16:51,401 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:16:51,401 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:16:51,401 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,401 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:16:51,401 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:16:51,401 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration11_Loop [2020-11-29 19:16:51,401 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:16:51,401 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:16:51,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,489 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:16:51,489 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:51,507 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,511 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:51,512 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,553 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:51,553 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,557 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:51,557 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:51,619 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:16:51,650 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:51,663 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:51,663 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~c~0=0} Honda state: {ULTIMATE.start_main_~c~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=-5}] Lambdas: [0, 1, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,689 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:51,689 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:16:51,712 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:51,735 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:16:51,736 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:16:51,736 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:16:51,736 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:16:51,736 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:16:51,736 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:16:51,737 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,737 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:16:51,737 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:16:51,737 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration11_Loop [2020-11-29 19:16:51,737 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:16:51,737 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:16:51,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:51,880 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:16:51,880 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,884 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:51,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:51,886 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:51,886 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:51,886 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,892 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:16:51,893 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,899 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,942 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:51,945 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:51,945 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:51,945 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:51,945 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,949 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:16:51,949 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,953 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:51,990 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:51,991 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:51,991 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:16:51,992 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:51,992 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:51,992 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:51,993 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:16:51,993 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:51,995 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:52,038 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:52,039 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:52,040 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:16:52,040 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:52,040 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:52,040 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:52,041 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:16:52,041 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,044 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:16:52,047 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:16:52,047 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:52,050 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:16:52,050 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:16:52,050 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:16:52,050 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = -2*ULTIMATE.start_main_~j~0 + 23 Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,084 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:16:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:52,114 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:16:52,114 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-11-29 19:16:52,128 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2020-11-29 19:16:52,129 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 [2020-11-29 19:16:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:16:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:16:52,130 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-11-29 19:16:52,130 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,130 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-29 19:16:52,130 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,130 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-29 19:16:52,130 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,131 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2020-11-29 19:16:52,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:16:52,132 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2020-11-29 19:16:52,132 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-29 19:16:52,132 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-11-29 19:16:52,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2020-11-29 19:16:52,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:16:52,132 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-29 19:16:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2020-11-29 19:16:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2020-11-29 19:16:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:16:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-29 19:16:52,134 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-29 19:16:52,134 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-29 19:16:52,135 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-29 19:16:52,135 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2020-11-29 19:16:52,135 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:16:52,135 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:16:52,135 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:16:52,136 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2020-11-29 19:16:52,136 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:16:52,136 INFO L794 eck$LassoCheckResult]: Stem: 585#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 586#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 583#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 584#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 596#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 595#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 594#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 593#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 592#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 591#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 590#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 589#L12-2 assume !(main_~j~0 < 12); 588#L12-3 main_~i~0 := 1 + main_~i~0; 587#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 582#L12-2 [2020-11-29 19:16:52,136 INFO L796 eck$LassoCheckResult]: Loop: 582#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 582#L12-2 [2020-11-29 19:16:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2020-11-29 19:16:52,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:52,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132683944] [2020-11-29 19:16:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:52,167 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:52,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:52,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:52,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,187 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-29 19:16:52,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:52,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242060072] [2020-11-29 19:16:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:52,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:52,190 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:52,190 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2020-11-29 19:16:52,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:16:52,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930413328] [2020-11-29 19:16:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:16:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:52,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:16:52,204 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:16:52,205 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:16:52,235 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:16:52,235 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:16:52,235 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:16:52,235 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:16:52,235 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:16:52,235 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,235 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:16:52,236 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:16:52,236 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration12_Loop [2020-11-29 19:16:52,236 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:16:52,236 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:16:52,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,324 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:16:52,324 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,333 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:52,333 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:16:52,358 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:52,376 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:52,376 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~c~0=0} Honda state: {ULTIMATE.start_main_~c~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=-5}] Lambdas: [0, 1, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:52,411 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:52,413 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:16:52,413 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: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:16:52,434 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:16:52,457 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:16:52,480 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:16:52,486 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:16:52,486 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:16:52,486 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:16:52,486 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:16:52,487 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:16:52,487 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,487 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:16:52,487 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:16:52,487 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration12_Loop [2020-11-29 19:16:52,487 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:16:52,487 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:16:52,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,491 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:16:52,566 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:16:52,566 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:52,576 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:52,577 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:52,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:16:52,578 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:52,578 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:52,578 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:52,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:16:52,579 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,581 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:52,621 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:16:52,623 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:16:52,623 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:16:52,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:16:52,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:16:52,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:16:52,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:16:52,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,628 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:16:52,635 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:16:52,635 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c083e181-4394-4fab-8775-996f8eac2de8/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:16:52,643 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:16:52,643 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:16:52,643 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:16:52,643 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = -2*ULTIMATE.start_main_~j~0 + 23 Supporting invariants [] Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:16:52,676 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:16:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:52,783 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:16:52,783 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 19:16:52,818 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-11-29 19:16:52,819 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 [2020-11-29 19:16:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:16:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:16:52,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:16:52,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,820 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:16:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:52,858 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:16:52,858 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 19:16:52,866 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-11-29 19:16:52,868 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 [2020-11-29 19:16:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:16:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:16:52,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:16:52,869 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,869 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:16:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:16:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:16:52,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:16:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:16:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:16:52,911 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:16:52,911 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-29 19:16:52,921 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2020-11-29 19:16:52,921 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 [2020-11-29 19:16:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:16:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-29 19:16:52,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:16:52,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2020-11-29 19:16:52,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2020-11-29 19:16:52,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:16:52,924 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2020-11-29 19:16:52,924 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:16:52,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2020-11-29 19:16:52,924 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 19:16:52,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 19:16:52,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 19:16:52,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:16:52,925 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:16:52,925 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:16:52,925 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:16:52,925 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-29 19:16:52,925 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:16:52,925 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:16:52,925 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 19:16:52,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 07:16:52 BoogieIcfgContainer [2020-11-29 19:16:52,930 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 19:16:52,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:16:52,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:16:52,930 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:16:52,931 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:16:47" (3/4) ... [2020-11-29 19:16:52,934 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:16:52,934 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:16:52,939 INFO L168 Benchmark]: Toolchain (without parser) took 5808.95 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 79.2 MB in the beginning and 112.9 MB in the end (delta: -33.7 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:16:52,943 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:16:52,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.47 ms. Allocated memory is still 109.1 MB. Free memory was 79.1 MB in the beginning and 87.3 MB in the end (delta: -8.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:16:52,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.97 ms. Allocated memory is still 109.1 MB. Free memory was 87.3 MB in the beginning and 85.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:16:52,944 INFO L168 Benchmark]: Boogie Preprocessor took 22.81 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 84.9 MB in the end (delta: 928.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:16:52,944 INFO L168 Benchmark]: RCFGBuilder took 234.07 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 77.0 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:16:52,945 INFO L168 Benchmark]: BuchiAutomizer took 5283.08 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 76.5 MB in the beginning and 113.9 MB in the end (delta: -37.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:16:52,945 INFO L168 Benchmark]: Witness Printer took 4.49 ms. Allocated memory is still 159.4 MB. Free memory is still 112.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:16:52,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.47 ms. Allocated memory is still 109.1 MB. Free memory was 79.1 MB in the beginning and 87.3 MB in the end (delta: -8.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.97 ms. Allocated memory is still 109.1 MB. Free memory was 87.3 MB in the beginning and 85.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.81 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 84.9 MB in the end (delta: 928.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 234.07 ms. Allocated memory is still 109.1 MB. Free memory was 84.9 MB in the beginning and 77.0 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5283.08 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 76.5 MB in the beginning and 113.9 MB in the end (delta: -37.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.49 ms. Allocated memory is still 159.4 MB. Free memory is still 112.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * i + 19 and consists of 3 locations. One deterministic module has affine ranking function -2 * j + 23 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * j + 23 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.2s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 4.3s. Construction of modules took 0.2s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax170 hnf97 lsp34 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 15ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...