./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.1.25-906a4fb [2020-10-19 18:39:48,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:39:48,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:39:48,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:39:48,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:39:48,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:39:48,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:39:48,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:39:48,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:39:48,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:39:48,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:39:48,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:39:48,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:39:48,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:39:48,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:39:48,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:39:48,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:39:48,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:39:48,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:39:48,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:39:48,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:39:48,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:39:48,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:39:48,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:39:48,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:39:48,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:39:48,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:39:48,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:39:48,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:39:48,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:39:48,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:39:48,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:39:48,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:39:48,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:39:48,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:39:48,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:39:48,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:39:48,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:39:48,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:39:48,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:39:48,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:39:48,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:39:49,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:39:49,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:39:49,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:39:49,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:39:49,033 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:39:49,033 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:39:49,033 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:39:49,033 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:39:49,034 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:39:49,034 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:39:49,035 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:39:49,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:39:49,036 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:39:49,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:39:49,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:39:49,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:39:49,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:39:49,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:39:49,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:39:49,038 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:39:49,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:39:49,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:39:49,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:39:49,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:39:49,040 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:39:49,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:39:49,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:39:49,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:39:49,041 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:39:49,042 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:39:49,043 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2020-10-19 18:39:49,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:39:49,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:39:49,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:39:49,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:39:49,386 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:39:49,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2020-10-19 18:39:49,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f14e7a1/9cef63c6e2994b4db786bed07f5e0aaa/FLAGe14a41ec5 [2020-10-19 18:39:49,925 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:39:49,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2020-10-19 18:39:49,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f14e7a1/9cef63c6e2994b4db786bed07f5e0aaa/FLAGe14a41ec5 [2020-10-19 18:39:50,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f14e7a1/9cef63c6e2994b4db786bed07f5e0aaa [2020-10-19 18:39:50,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:39:50,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:39:50,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:39:50,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:39:50,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:39:50,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5869199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50, skipping insertion in model container [2020-10-19 18:39:50,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:39:50,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:39:50,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:39:50,509 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:39:50,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:39:50,540 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:39:50,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50 WrapperNode [2020-10-19 18:39:50,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:39:50,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:39:50,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:39:50,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:39:50,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:39:50,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:39:50,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:39:50,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:39:50,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... [2020-10-19 18:39:50,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:39:50,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:39:50,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:39:50,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:39:50,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:39:50,725 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-19 18:39:50,725 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-19 18:39:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-19 18:39:50,728 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-10-19 18:39:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:39:50,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:39:50,891 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:39:50,891 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 18:39:50,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:39:50 BoogieIcfgContainer [2020-10-19 18:39:50,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:39:50,894 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:39:50,894 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:39:50,898 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:39:50,899 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:39:50,899 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:39:50" (1/3) ... [2020-10-19 18:39:50,901 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b8e9b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:39:50, skipping insertion in model container [2020-10-19 18:39:50,901 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:39:50,901 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:39:50" (2/3) ... [2020-10-19 18:39:50,902 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b8e9b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:39:50, skipping insertion in model container [2020-10-19 18:39:50,902 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:39:50,902 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:39:50" (3/3) ... [2020-10-19 18:39:50,904 INFO L373 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2020-10-19 18:39:50,955 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:39:50,956 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:39:50,956 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:39:50,956 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:39:50,956 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:39:50,957 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:39:50,957 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:39:50,957 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:39:50,971 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2020-10-19 18:39:50,998 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:39:50,999 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:39:50,999 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:39:51,009 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:39:51,009 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-19 18:39:51,009 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:39:51,010 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2020-10-19 18:39:51,012 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:39:51,013 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:39:51,013 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:39:51,013 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:39:51,014 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-19 18:39:51,022 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 3#L26true call main_#t~ret5 := g(main_~x~0);< 13#gENTRYtrue [2020-10-19 18:39:51,023 INFO L796 eck$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 [2020-10-19 18:39:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:51,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2020-10-19 18:39:51,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:51,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802189203] [2020-10-19 18:39:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:51,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:51,117 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:51,137 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:39:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2020-10-19 18:39:51,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:51,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785681029] [2020-10-19 18:39:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:51,160 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:51,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:51,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:39:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2020-10-19 18:39:51,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:51,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821889365] [2020-10-19 18:39:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:51,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:51,187 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:51,190 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:39:51,458 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:39:51,459 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:39:51,459 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:39:51,459 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:39:51,459 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:39:51,460 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:51,460 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:39:51,460 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:39:51,460 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2020-10-19 18:39:51,461 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:39:51,461 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:39:51,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,607 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:39:51,608 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:51,622 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:39:51,622 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:39:51,631 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:39:51,632 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:39:51,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:39:51,676 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 [2020-10-19 18:39:51,680 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:39:51,681 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:39:51,723 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:39:51,724 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 [2020-10-19 18:39:51,727 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:39:51,728 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:51,767 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:39:51,767 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:39:51,771 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:39:51,771 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:51,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:39:51,800 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:51,826 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:39:51,826 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:39:51,900 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:39:51,902 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:39:51,902 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:39:51,902 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:39:51,902 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:39:51,903 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:39:51,903 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:51,903 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:39:51,903 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:39:51,903 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2020-10-19 18:39:51,904 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:39:51,904 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:39:51,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:51,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:39:52,014 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:39:52,020 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:52,030 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 [2020-10-19 18:39:52,033 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,033 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,034 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,034 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,035 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,039 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,039 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:39:52,045 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:39:52,093 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 [2020-10-19 18:39:52,096 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,096 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,096 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,096 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,097 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,098 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,099 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 [2020-10-19 18:39:52,104 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:39:52,156 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 [2020-10-19 18:39:52,159 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,159 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,159 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,159 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,159 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,162 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,162 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:39:52,166 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:39:52,211 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 [2020-10-19 18:39:52,213 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,213 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,214 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,214 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,214 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,216 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:52,218 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:39:52,264 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 [2020-10-19 18:39:52,266 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,266 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,267 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,267 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,267 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,269 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,270 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:52,279 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:52,313 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 [2020-10-19 18:39:52,314 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,314 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,315 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,315 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,315 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:39:52,318 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:39:52,341 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 [2020-10-19 18:39:52,349 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:39:52,349 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:39:52,349 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:39:52,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:39:52,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:39:52,352 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:39:52,352 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:39:52,358 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:39:52,372 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:39:52,372 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:39:52,378 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:39:52,379 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:39:52,379 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:39:52,380 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2020-10-19 18:39:52,403 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:39:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:39:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:39:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:39:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:39:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:39:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:39:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:39:52,608 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 [2020-10-19 18:39:52,610 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 6 states. [2020-10-19 18:39:52,841 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. [2020-10-19 18:39:52,842 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 [2020-10-19 18:39:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:39:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2020-10-19 18:39:52,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2020-10-19 18:39:52,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:39:52,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2020-10-19 18:39:52,855 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:39:52,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2020-10-19 18:39:52,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:39:52,858 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2020-10-19 18:39:52,877 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:39:52,891 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2020-10-19 18:39:52,893 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2020-10-19 18:39:52,894 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2020-10-19 18:39:52,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2020-10-19 18:39:52,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:39:52,901 INFO L691 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-10-19 18:39:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2020-10-19 18:39:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-19 18:39:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:39:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-10-19 18:39:52,957 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-19 18:39:52,957 INFO L594 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-19 18:39:52,957 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:39:52,958 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2020-10-19 18:39:52,962 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:39:52,962 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:39:52,962 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:39:52,964 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:39:52,964 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:39:52,965 INFO L794 eck$LassoCheckResult]: Stem: 185#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 159#L26 call main_#t~ret5 := g(main_~x~0);< 160#gENTRY ~x := #in~x; 186#L19 assume !(~x <= 0); 168#L20 call #t~ret2 := f(~x - 1);< 173#fENTRY ~x := #in~x; 196#L13 assume !(~x <= 0); 162#L14 call #t~ret0 := g(~x);< 187#gENTRY ~x := #in~x; 177#L19 assume ~x <= 0;#res := 0; 161#gFINAL assume true; 163#gEXIT >#26#return; 171#L14-1 [2020-10-19 18:39:52,965 INFO L796 eck$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 [2020-10-19 18:39:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2020-10-19 18:39:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:52,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255056388] [2020-10-19 18:39:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:39:53,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-19 18:39:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:39:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:39:53,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255056388] [2020-10-19 18:39:53,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:39:53,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:39:53,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920066637] [2020-10-19 18:39:53,109 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:39:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2020-10-19 18:39:53,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:53,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659825772] [2020-10-19 18:39:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:39:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 18:39:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:39:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:39:53,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659825772] [2020-10-19 18:39:53,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:39:53,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:39:53,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026933220] [2020-10-19 18:39:53,153 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:39:53,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:39:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:39:53,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:39:53,157 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. cyclomatic complexity: 14 Second operand 5 states. [2020-10-19 18:39:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:39:53,226 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-19 18:39:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:39:53,228 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2020-10-19 18:39:53,230 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:39:53,232 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2020-10-19 18:39:53,233 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2020-10-19 18:39:53,233 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2020-10-19 18:39:53,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2020-10-19 18:39:53,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:39:53,234 INFO L691 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-19 18:39:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2020-10-19 18:39:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-19 18:39:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:39:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-19 18:39:53,241 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-19 18:39:53,241 INFO L594 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-19 18:39:53,241 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:39:53,241 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2020-10-19 18:39:53,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:39:53,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:39:53,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:39:53,245 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:39:53,245 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:39:53,246 INFO L794 eck$LassoCheckResult]: Stem: 300#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 272#L26 call main_#t~ret5 := g(main_~x~0);< 273#gENTRY ~x := #in~x; 296#L19 assume !(~x <= 0); 285#L20 call #t~ret2 := f(~x - 1);< 290#fENTRY ~x := #in~x; 309#L13 assume !(~x <= 0); 277#L14 call #t~ret0 := g(~x);< 302#gENTRY ~x := #in~x; 303#L19 assume !(~x <= 0); 288#L20 call #t~ret2 := f(~x - 1);< 289#fENTRY ~x := #in~x; 305#L13 assume ~x <= 0;#res := 0; 307#fFINAL assume true; 291#fEXIT >#30#return; 292#L20-1 call #t~ret3 := f(~x - 2);< 297#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 314#fFINAL assume true; 311#fEXIT >#32#return; 299#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2020-10-19 18:39:53,246 INFO L796 eck$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~ret3;havoc #t~ret2; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2020-10-19 18:39:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2020-10-19 18:39:53,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:53,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510706436] [2020-10-19 18:39:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:53,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:53,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:53,274 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:39:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2020-10-19 18:39:53,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:53,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498118566] [2020-10-19 18:39:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:53,287 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:53,306 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:53,314 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:39:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:39:53,315 INFO L82 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2020-10-19 18:39:53,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:39:53,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927938739] [2020-10-19 18:39:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:39:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:53,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:39:53,399 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:39:53,409 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:39:54,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:39:54 BoogieIcfgContainer [2020-10-19 18:39:54,109 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:39:54,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:39:54,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:39:54,110 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:39:54,110 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:39:50" (3/4) ... [2020-10-19 18:39:54,113 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:39:54,160 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:39:54,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:39:54,163 INFO L168 Benchmark]: Toolchain (without parser) took 3871.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 954.6 MB in the beginning and 820.6 MB in the end (delta: 134.0 MB). Peak memory consumption was 273.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:39:54,164 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:39:54,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.92 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:39:54,165 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.87 ms. Allocated memory is still 1.0 GB. Free memory is still 943.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:39:54,166 INFO L168 Benchmark]: Boogie Preprocessor took 76.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -191.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:39:54,166 INFO L168 Benchmark]: RCFGBuilder took 239.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:39:54,167 INFO L168 Benchmark]: BuchiAutomizer took 3214.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 827.2 MB in the end (delta: 290.9 MB). Peak memory consumption was 290.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:39:54,168 INFO L168 Benchmark]: Witness Printer took 50.91 ms. Allocated memory is still 1.2 GB. Free memory was 827.2 MB in the beginning and 820.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:39:54,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 240.92 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.87 ms. Allocated memory is still 1.0 GB. Free memory is still 943.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 76.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -191.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 239.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3214.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 827.2 MB in the end (delta: 290.9 MB). Peak memory consumption was 290.9 MB. Max. memory is 11.5 GB. * Witness Printer took 50.91 ms. Allocated memory is still 1.2 GB. Free memory was 827.2 MB in the beginning and 820.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 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 3.1s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 2.4s. Construction of modules took 0.1s. 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, 0.1s 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: 0.1s - 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@5f58fcb9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@73228b9d=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@af52313=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@251aed8d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3191d2ed=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@56ceff6c=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...