./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.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_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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 c27ad91a5bec233234e07a14bfd5505e082df4cd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:02:25,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:02:25,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:02:25,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:02:25,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:02:25,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:02:25,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:02:25,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:02:25,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:02:25,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:02:25,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:02:25,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:02:25,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:02:25,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:02:25,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:02:25,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:02:25,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:02:25,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:02:25,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:02:25,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:02:25,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:02:25,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:02:25,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:02:25,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:02:25,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:02:25,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:02:25,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:02:25,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:02:25,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:02:25,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:02:25,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:02:25,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:02:25,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:02:25,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:02:25,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:02:25,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:02:25,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:02:25,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:02:25,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:02:25,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:02:25,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:02:25,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 03:02:25,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:02:25,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:02:25,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:02:25,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:02:25,838 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:02:25,838 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:02:25,838 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:02:25,838 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:02:25,839 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:02:25,839 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:02:25,840 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:02:25,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:02:25,840 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:02:25,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:02:25,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:02:25,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:02:25,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:02:25,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:02:25,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:02:25,842 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:02:25,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:02:25,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:02:25,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:02:25,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:02:25,843 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:02:25,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:02:25,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:02:25,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:02:25,844 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:02:25,846 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:02:25,847 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_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c27ad91a5bec233234e07a14bfd5505e082df4cd [2020-11-28 03:02:26,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:02:26,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:02:26,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:02:26,180 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:02:26,181 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:02:26,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2020-11-28 03:02:26,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/data/556f9cec1/273b6cdb93294757aa2b4bb3942f1390/FLAG57943ff9d [2020-11-28 03:02:26,857 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:02:26,857 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2020-11-28 03:02:26,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/data/556f9cec1/273b6cdb93294757aa2b4bb3942f1390/FLAG57943ff9d [2020-11-28 03:02:27,230 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/data/556f9cec1/273b6cdb93294757aa2b4bb3942f1390 [2020-11-28 03:02:27,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:02:27,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:02:27,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:27,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:02:27,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:02:27,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8d38b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27, skipping insertion in model container [2020-11-28 03:02:27,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:02:27,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:02:27,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:27,436 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:02:27,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:27,486 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:02:27,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27 WrapperNode [2020-11-28 03:02:27,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:27,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:27,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:02:27,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:02:27,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:27,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:02:27,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:02:27,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:02:27,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:02:27,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:02:27,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:02:27,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:02:27,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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 [2020-11-28 03:02:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-28 03:02:27,615 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-28 03:02:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-11-28 03:02:27,616 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-11-28 03:02:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:02:27,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:02:27,883 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:02:27,883 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:02:27,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:27 BoogieIcfgContainer [2020-11-28 03:02:27,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:02:27,886 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:02:27,886 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:02:27,902 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:02:27,903 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:02:27,904 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:02:27" (1/3) ... [2020-11-28 03:02:27,905 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5035ed6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:02:27, skipping insertion in model container [2020-11-28 03:02:27,905 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:02:27,906 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (2/3) ... [2020-11-28 03:02:27,906 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5035ed6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:02:27, skipping insertion in model container [2020-11-28 03:02:27,906 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:02:27,906 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:27" (3/3) ... [2020-11-28 03:02:27,908 INFO L373 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2020-11-28 03:02:28,031 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:02:28,031 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:02:28,032 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:02:28,032 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:02:28,032 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:02:28,032 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:02:28,032 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:02:28,033 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:02:28,053 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2020-11-28 03:02:28,082 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 03:02:28,083 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:02:28,083 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:02:28,091 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:02:28,091 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:02:28,092 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:02:28,092 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2020-11-28 03:02:28,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 03:02:28,098 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:02:28,098 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:02:28,099 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:02:28,099 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:02:28,107 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 3#L26true call main_#t~ret5 := g(main_~x~0);< 13#gENTRYtrue [2020-11-28 03:02:28,107 INFO L796 eck$LassoCheckResult]: Loop: 13#gENTRYtrue ~x := #in~x; 9#L19true assume !(~x <= 0); 7#L20true call #t~ret2 := f(~x - 1);< 14#fENTRYtrue ~x := #in~x; 18#L13true assume !(~x <= 0); 15#L14true call #t~ret0 := g(~x);< 13#gENTRYtrue [2020-11-28 03:02:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2020-11-28 03:02:28,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:28,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859029270] [2020-11-28 03:02:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:28,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:28,237 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,262 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2020-11-28 03:02:28,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:28,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791912783] [2020-11-28 03:02:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:28,310 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:28,327 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,331 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2020-11-28 03:02:28,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:28,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334260517] [2020-11-28 03:02:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:28,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:28,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:28,383 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:28,670 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:02:28,673 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:02:28,673 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:02:28,673 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:02:28,674 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:02:28,674 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:28,674 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:02:28,674 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:02:28,674 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2020-11-28 03:02:28,674 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:02:28,675 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:02:28,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:28,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,023 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:02:29,024 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,032 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:02:29,032 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,041 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:02:29,042 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:02:29,091 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,095 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:02:29,095 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,145 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:02:29,145 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,152 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:02:29,152 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:02:29,200 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,208 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:02:29,208 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,256 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:02:29,256 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,309 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:02:29,309 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,409 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:02:29,412 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:02:29,412 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:02:29,412 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:02:29,412 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:02:29,412 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:02:29,413 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,413 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:02:29,413 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:02:29,413 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2020-11-28 03:02:29,413 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:02:29,413 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:02:29,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:02:29,574 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:02:29,579 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,591 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 [2020-11-28 03:02:29,593 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,593 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,594 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,594 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,594 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:02:29,597 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,603 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:02:29,653 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 [2020-11-28 03:02:29,655 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,655 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,655 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,655 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,656 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:02:29,657 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,657 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,660 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,706 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 [2020-11-28 03:02:29,708 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,708 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,709 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,709 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,709 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:02:29,710 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,711 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:02:29,714 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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 [2020-11-28 03:02:29,750 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 [2020-11-28 03:02:29,753 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,753 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,753 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,753 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:02:29,755 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,756 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:02:29,758 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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) [2020-11-28 03:02:29,809 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 [2020-11-28 03:02:29,811 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,811 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,811 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,811 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,812 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,816 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,816 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:02:29,819 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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) [2020-11-28 03:02:29,867 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 [2020-11-28 03:02:29,869 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,869 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,870 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,870 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,870 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:02:29,871 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,871 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,874 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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) [2020-11-28 03:02:29,921 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 [2020-11-28 03:02:29,922 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:02:29,923 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:02:29,923 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:02:29,923 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:02:29,923 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:02:29,927 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:02:29,927 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:02:29,933 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:02:29,940 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:02:29,940 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/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 [2020-11-28 03:02:29,972 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:02:29,972 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:02:29,973 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:02:29,973 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2020-11-28 03:02:30,018 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:02:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:02:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:02:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:30,237 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-28 03:02:30,239 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 6 states. [2020-11-28 03:02:30,568 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 6 states. Result 62 states and 81 transitions. Complement of second has 24 states. [2020-11-28 03:02:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:02:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 03:02:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2020-11-28 03:02:30,576 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-28 03:02:30,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:02:30,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2020-11-28 03:02:30,580 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:02:30,580 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2020-11-28 03:02:30,580 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:02:30,581 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2020-11-28 03:02:30,601 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 03:02:30,614 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2020-11-28 03:02:30,615 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2020-11-28 03:02:30,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2020-11-28 03:02:30,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2020-11-28 03:02:30,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:02:30,619 INFO L691 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-11-28 03:02:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2020-11-28 03:02:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-11-28 03:02:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:02:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-11-28 03:02:30,665 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-11-28 03:02:30,665 INFO L594 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-11-28 03:02:30,665 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:02:30,665 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2020-11-28 03:02:30,667 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 03:02:30,667 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:02:30,667 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:02:30,669 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:30,669 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:30,669 INFO L794 eck$LassoCheckResult]: Stem: 185#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 159#L26 call main_#t~ret5 := g(main_~x~0);< 160#gENTRY ~x := #in~x; 186#L19 assume !(~x <= 0); 168#L20 call #t~ret2 := f(~x - 1);< 173#fENTRY ~x := #in~x; 196#L13 assume !(~x <= 0); 162#L14 call #t~ret0 := g(~x);< 187#gENTRY ~x := #in~x; 177#L19 assume ~x <= 0;#res := 0; 161#gFINAL assume true; 163#gEXIT >#26#return; 171#L14-1 [2020-11-28 03:02:30,670 INFO L796 eck$LassoCheckResult]: Loop: 171#L14-1 call #t~ret1 := g(1 + ~x);< 192#gENTRY ~x := #in~x; 200#L19 assume !(~x <= 0); 191#L20 call #t~ret2 := f(~x - 1);< 181#fENTRY ~x := #in~x; 197#L13 assume !(~x <= 0); 180#L14 call #t~ret0 := g(~x);< 192#gENTRY ~x := #in~x; 200#L19 assume ~x <= 0;#res := 0; 184#gFINAL assume true; 202#gEXIT >#26#return; 171#L14-1 [2020-11-28 03:02:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2020-11-28 03:02:30,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:30,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360912880] [2020-11-28 03:02:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:30,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:02:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:02:30,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360912880] [2020-11-28 03:02:30,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:30,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:30,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878015191] [2020-11-28 03:02:30,782 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:02:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2020-11-28 03:02:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:30,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387762768] [2020-11-28 03:02:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:30,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-28 03:02:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:02:30,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387762768] [2020-11-28 03:02:30,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:30,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:30,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686289204] [2020-11-28 03:02:30,886 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:02:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:02:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:30,893 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. cyclomatic complexity: 14 Second operand 5 states. [2020-11-28 03:02:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:30,988 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-11-28 03:02:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:02:30,989 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2020-11-28 03:02:30,992 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 03:02:30,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2020-11-28 03:02:30,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2020-11-28 03:02:30,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2020-11-28 03:02:30,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2020-11-28 03:02:30,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:02:30,996 INFO L691 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-11-28 03:02:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2020-11-28 03:02:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-28 03:02:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 03:02:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-11-28 03:02:31,003 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-11-28 03:02:31,003 INFO L594 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-11-28 03:02:31,003 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:02:31,003 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2020-11-28 03:02:31,005 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 03:02:31,005 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:02:31,005 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:02:31,008 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:31,008 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:31,008 INFO L794 eck$LassoCheckResult]: Stem: 300#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 272#L26 call main_#t~ret5 := g(main_~x~0);< 273#gENTRY ~x := #in~x; 296#L19 assume !(~x <= 0); 285#L20 call #t~ret2 := f(~x - 1);< 290#fENTRY ~x := #in~x; 309#L13 assume !(~x <= 0); 277#L14 call #t~ret0 := g(~x);< 302#gENTRY ~x := #in~x; 303#L19 assume !(~x <= 0); 288#L20 call #t~ret2 := f(~x - 1);< 289#fENTRY ~x := #in~x; 305#L13 assume ~x <= 0;#res := 0; 307#fFINAL assume true; 291#fEXIT >#30#return; 292#L20-1 call #t~ret3 := f(~x - 2);< 297#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 314#fFINAL assume true; 311#fEXIT >#32#return; 299#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2020-11-28 03:02:31,008 INFO L796 eck$LassoCheckResult]: Loop: 275#L14-1 call #t~ret1 := g(1 + ~x);< 301#gENTRY ~x := #in~x; 295#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 313#fENTRY ~x := #in~x; 310#L13 assume !(~x <= 0); 276#L14 call #t~ret0 := g(~x);< 301#gENTRY ~x := #in~x; 295#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 313#fENTRY ~x := #in~x; 310#L13 assume ~x <= 0;#res := 0; 279#fFINAL assume true; 282#fEXIT >#30#return; 281#L20-1 call #t~ret3 := f(~x - 2);< 313#fENTRY ~x := #in~x; 310#L13 assume ~x <= 0;#res := 0; 279#fFINAL assume true; 282#fEXIT >#32#return; 299#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2020-11-28 03:02:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2020-11-28 03:02:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:31,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316556134] [2020-11-28 03:02:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:31,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:31,060 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:31,064 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2020-11-28 03:02:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:31,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366161123] [2020-11-28 03:02:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:31,086 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:31,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:31,104 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2020-11-28 03:02:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:31,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507545252] [2020-11-28 03:02:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:31,136 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:31,154 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:31,164 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:32,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:02:32 BoogieIcfgContainer [2020-11-28 03:02:32,208 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:02:32,208 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:02:32,209 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:02:32,209 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:02:32,209 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:27" (3/4) ... [2020-11-28 03:02:32,213 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-28 03:02:32,284 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_06abb36e-e6bf-441b-9ca2-aa1f89c08498/bin/uautomizer/witness.graphml [2020-11-28 03:02:32,284 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:02:32,286 INFO L168 Benchmark]: Toolchain (without parser) took 5040.26 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 115.8 MB in the beginning and 92.0 MB in the end (delta: 23.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:32,289 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 44.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:32,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.99 ms. Allocated memory is still 146.8 MB. Free memory was 115.5 MB in the beginning and 121.8 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:32,293 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.86 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 120.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:32,294 INFO L168 Benchmark]: Boogie Preprocessor took 17.77 ms. Allocated memory is still 146.8 MB. Free memory was 120.5 MB in the beginning and 119.8 MB in the end (delta: 788.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:32,294 INFO L168 Benchmark]: RCFGBuilder took 344.12 ms. Allocated memory is still 146.8 MB. Free memory was 119.8 MB in the beginning and 110.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:32,296 INFO L168 Benchmark]: BuchiAutomizer took 4321.77 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 110.5 MB in the beginning and 94.1 MB in the end (delta: 16.4 MB). Peak memory consumption was 66.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:32,296 INFO L168 Benchmark]: Witness Printer took 75.70 ms. Allocated memory is still 176.2 MB. Free memory was 94.1 MB in the beginning and 92.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:32,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 44.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.99 ms. Allocated memory is still 146.8 MB. Free memory was 115.5 MB in the beginning and 121.8 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.86 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 120.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.77 ms. Allocated memory is still 146.8 MB. Free memory was 120.5 MB in the beginning and 119.8 MB in the end (delta: 788.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 344.12 ms. Allocated memory is still 146.8 MB. Free memory was 119.8 MB in the beginning and 110.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4321.77 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 110.5 MB in the beginning and 94.1 MB in the end (delta: 16.4 MB). Peak memory consumption was 66.3 MB. Max. memory is 16.1 GB. * Witness Printer took 75.70 ms. Allocated memory is still 176.2 MB. Free memory was 94.1 MB in the beginning and 92.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 7 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 44 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.1s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 3.3s. Construction of modules took 0.2s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 22 SDslu, 41 SDs, 0 SdLazy, 81 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 14]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e0e2f3d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1e3daf0a=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6b568500=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@15146379=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@db8be0f=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@57127a23=0, NULL=0, x=1, \result=0, \old(x)=0, x=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...