./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 30f4e4ab 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 0.1.24-30f4e4a [2019-11-28 02:56:21,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:56:21,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:56:21,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:56:21,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:56:21,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:56:21,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:56:21,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:56:21,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:56:21,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:56:21,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:56:21,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:56:21,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:56:21,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:56:21,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:56:21,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:56:21,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:56:21,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:56:21,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:56:21,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:56:21,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:56:21,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:56:21,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:56:21,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:56:21,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:56:21,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:56:21,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:56:21,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:56:21,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:56:21,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:56:21,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:56:21,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:56:21,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:56:21,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:56:21,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:56:21,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:56:21,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:56:21,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:56:21,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:56:21,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:56:21,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:56:21,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 02:56:21,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:56:21,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:56:21,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:56:21,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:56:21,739 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:56:21,740 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 02:56:21,740 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 02:56:21,740 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 02:56:21,740 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 02:56:21,740 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 02:56:21,744 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 02:56:21,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:56:21,744 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:56:21,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:56:21,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:56:21,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 02:56:21,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 02:56:21,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 02:56:21,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 02:56:21,746 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 02:56:21,746 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:56:21,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 02:56:21,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:56:21,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:56:21,749 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 02:56:21,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:56:21,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:56:21,750 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 02:56:21,751 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 02:56:21,751 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 [2019-11-28 02:56:22,109 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:56:22,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:56:22,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:56:22,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:56:22,130 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:56:22,132 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2019-11-28 02:56:22,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf6ee965d/4ebbc3d9ce4e49cb872fec42104ae16b/FLAG579366180 [2019-11-28 02:56:22,674 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:56:22,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2019-11-28 02:56:22,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf6ee965d/4ebbc3d9ce4e49cb872fec42104ae16b/FLAG579366180 [2019-11-28 02:56:23,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf6ee965d/4ebbc3d9ce4e49cb872fec42104ae16b [2019-11-28 02:56:23,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:56:23,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 02:56:23,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:23,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:56:23,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:56:23,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c1ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23, skipping insertion in model container [2019-11-28 02:56:23,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:56:23,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:56:23,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:23,370 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:56:23,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:23,407 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:56:23,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23 WrapperNode [2019-11-28 02:56:23,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:23,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:23,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 02:56:23,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 02:56:23,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:23,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:56:23,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:56:23,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:56:23,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (1/1) ... [2019-11-28 02:56:23,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:56:23,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:56:23,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:56:23,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:56:23,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (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 [2019-11-28 02:56:23,582 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-11-28 02:56:23,582 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-11-28 02:56:23,583 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-28 02:56:23,583 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-28 02:56:23,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:56:23,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:56:23,739 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:56:23,739 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 02:56:23,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:23 BoogieIcfgContainer [2019-11-28 02:56:23,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:56:23,741 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 02:56:23,741 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 02:56:23,744 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 02:56:23,745 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:23,745 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:56:23" (1/3) ... [2019-11-28 02:56:23,746 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3d98f36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:23, skipping insertion in model container [2019-11-28 02:56:23,746 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:23,746 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:23" (2/3) ... [2019-11-28 02:56:23,747 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3d98f36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:23, skipping insertion in model container [2019-11-28 02:56:23,747 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:23,747 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:23" (3/3) ... [2019-11-28 02:56:23,749 INFO L371 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2019-11-28 02:56:23,792 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 02:56:23,792 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 02:56:23,792 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 02:56:23,792 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:56:23,792 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:56:23,793 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 02:56:23,793 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:56:23,793 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 02:56:23,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-28 02:56:23,837 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 02:56:23,838 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:23,838 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:23,846 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:23,847 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2019-11-28 02:56:23,847 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 02:56:23,847 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-28 02:56:23,850 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 02:56:23,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:23,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:23,850 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:23,850 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2019-11-28 02:56:23,857 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 3#L26true call main_#t~ret5 := g(main_~x~0);< 13#gENTRYtrue [2019-11-28 02:56:23,857 INFO L796 eck$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 [2019-11-28 02:56:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:23,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2019-11-28 02:56:23,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:23,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532989311] [2019-11-28 02:56:23,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:23,962 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2019-11-28 02:56:23,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:23,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603883512] [2019-11-28 02:56:23,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:23,991 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2019-11-28 02:56:23,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:23,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495732857] [2019-11-28 02:56:23,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:24,010 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:24,171 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:24,172 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:24,172 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:24,173 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:24,173 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:24,173 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:24,173 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:24,173 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:24,174 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2019-11-28 02:56:24,174 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:24,174 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:24,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,239 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,326 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:24,327 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) [2019-11-28 02:56:24,362 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:24,363 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 [2019-11-28 02:56:24,379 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:24,380 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe 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) [2019-11-28 02:56:24,401 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:24,401 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 [2019-11-28 02:56:24,406 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:24,406 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) [2019-11-28 02:56:24,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:24,423 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 [2019-11-28 02:56:24,428 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:24,428 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) [2019-11-28 02:56:24,444 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:24,444 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 [2019-11-28 02:56:24,450 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:24,450 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) [2019-11-28 02:56:24,467 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:24,467 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 /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) [2019-11-28 02:56:24,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:24,485 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 [2019-11-28 02:56:24,548 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:24,550 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:24,550 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:24,550 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:24,551 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:24,551 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:24,551 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:24,551 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:24,551 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:24,551 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2019-11-28 02:56:24,552 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:24,552 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:24,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,582 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,609 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:24,694 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:24,703 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) [2019-11-28 02:56:24,710 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 [2019-11-28 02:56:24,714 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,715 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,715 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,717 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,720 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,720 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 [2019-11-28 02:56:24,724 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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:24,731 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 [2019-11-28 02:56:24,732 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,732 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,734 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:24,738 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) [2019-11-28 02:56:24,755 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 [2019-11-28 02:56:24,757 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,758 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,758 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,758 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,758 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:24,762 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) [2019-11-28 02:56:24,775 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 [2019-11-28 02:56:24,777 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,777 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,778 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,778 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,778 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,779 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,779 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 [2019-11-28 02:56:24,782 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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:24,801 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 [2019-11-28 02:56:24,803 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,803 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,803 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,803 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,803 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,804 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,804 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:24,808 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) [2019-11-28 02:56:24,820 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 Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:24,823 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,823 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,823 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,824 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,824 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,825 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,825 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:24,828 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 [2019-11-28 02:56:24,836 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 [2019-11-28 02:56:24,839 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:24,839 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:24,839 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:24,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:24,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:24,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:24,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:24,845 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:24,854 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:56:24,854 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 [2019-11-28 02:56:24,862 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:24,863 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:24,863 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:24,865 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2019-11-28 02:56:24,870 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:24,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:56:24,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:24,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 02:56:24,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:25,062 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 [2019-11-28 02:56:25,063 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 6 states. [2019-11-28 02:56:25,283 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 6 states. Result 62 states and 81 transitions. Complement of second has 24 states. [2019-11-28 02:56:25,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 02:56:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2019-11-28 02:56:25,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-28 02:56:25,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:25,293 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-28 02:56:25,293 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:25,293 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2019-11-28 02:56:25,294 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:25,295 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2019-11-28 02:56:25,302 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 02:56:25,312 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2019-11-28 02:56:25,314 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2019-11-28 02:56:25,314 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2019-11-28 02:56:25,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2019-11-28 02:56:25,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:25,318 INFO L688 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2019-11-28 02:56:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2019-11-28 02:56:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-28 02:56:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 02:56:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2019-11-28 02:56:25,361 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2019-11-28 02:56:25,362 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2019-11-28 02:56:25,362 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 02:56:25,362 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2019-11-28 02:56:25,364 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 02:56:25,364 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:25,365 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:25,366 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:25,366 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:25,367 INFO L794 eck$LassoCheckResult]: Stem: 185#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 159#L26 call main_#t~ret5 := g(main_~x~0);< 160#gENTRY ~x := #in~x; 186#L19 assume !(~x <= 0); 168#L20 call #t~ret2 := f(~x - 1);< 173#fENTRY ~x := #in~x; 196#L13 assume !(~x <= 0); 162#L14 call #t~ret0 := g(~x);< 187#gENTRY ~x := #in~x; 177#L19 assume ~x <= 0;#res := 0; 161#gFINAL assume true; 163#gEXIT >#26#return; 171#L14-1 [2019-11-28 02:56:25,367 INFO L796 eck$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 [2019-11-28 02:56:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2019-11-28 02:56:25,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:25,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471231105] [2019-11-28 02:56:25,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 02:56:25,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471231105] [2019-11-28 02:56:25,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:25,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 02:56:25,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282258415] [2019-11-28 02:56:25,498 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 02:56:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2019-11-28 02:56:25,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:25,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843595468] [2019-11-28 02:56:25,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 02:56:25,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843595468] [2019-11-28 02:56:25,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 02:56:25,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332714963] [2019-11-28 02:56:25,572 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 02:56:25,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 02:56:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 02:56:25,579 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. cyclomatic complexity: 14 Second operand 5 states. [2019-11-28 02:56:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:25,657 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-28 02:56:25,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 02:56:25,659 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2019-11-28 02:56:25,661 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 02:56:25,664 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2019-11-28 02:56:25,664 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2019-11-28 02:56:25,665 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2019-11-28 02:56:25,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2019-11-28 02:56:25,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:25,665 INFO L688 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-28 02:56:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2019-11-28 02:56:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 02:56:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 02:56:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-11-28 02:56:25,677 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-28 02:56:25,677 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-28 02:56:25,677 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 02:56:25,678 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2019-11-28 02:56:25,682 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 02:56:25,682 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:25,682 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:25,687 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:25,687 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:25,687 INFO L794 eck$LassoCheckResult]: Stem: 300#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 272#L26 call main_#t~ret5 := g(main_~x~0);< 273#gENTRY ~x := #in~x; 296#L19 assume !(~x <= 0); 285#L20 call #t~ret2 := f(~x - 1);< 290#fENTRY ~x := #in~x; 309#L13 assume !(~x <= 0); 277#L14 call #t~ret0 := g(~x);< 302#gENTRY ~x := #in~x; 303#L19 assume !(~x <= 0); 288#L20 call #t~ret2 := f(~x - 1);< 289#fENTRY ~x := #in~x; 305#L13 assume ~x <= 0;#res := 0; 307#fFINAL assume true; 291#fEXIT >#30#return; 292#L20-1 call #t~ret3 := f(~x - 2);< 297#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 314#fFINAL assume true; 311#fEXIT >#32#return; 299#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2019-11-28 02:56:25,688 INFO L796 eck$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 [2019-11-28 02:56:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2019-11-28 02:56:25,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:25,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821723884] [2019-11-28 02:56:25,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:25,743 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2019-11-28 02:56:25,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:25,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747882793] [2019-11-28 02:56:25,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:25,793 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2019-11-28 02:56:25,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:25,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981084790] [2019-11-28 02:56:25,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:25,860 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:26,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:56:26 BoogieIcfgContainer [2019-11-28 02:56:26,605 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 02:56:26,606 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:56:26,606 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:56:26,606 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:56:26,607 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:23" (3/4) ... [2019-11-28 02:56:26,611 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-28 02:56:26,664 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 02:56:26,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:56:26,668 INFO L168 Benchmark]: Toolchain (without parser) took 3558.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 62.9 MB). Free memory was 957.7 MB in the beginning and 744.9 MB in the end (delta: 212.8 MB). Peak memory consumption was 275.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:26,668 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:26,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.91 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:26,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.65 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 62.9 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -109.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:26,670 INFO L168 Benchmark]: Boogie Preprocessor took 17.84 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:26,671 INFO L168 Benchmark]: RCFGBuilder took 217.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:26,671 INFO L168 Benchmark]: BuchiAutomizer took 2864.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 751.9 MB in the end (delta: 286.3 MB). Peak memory consumption was 286.3 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:26,672 INFO L168 Benchmark]: Witness Printer took 59.24 ms. Allocated memory is still 1.1 GB. Free memory was 751.9 MB in the beginning and 744.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:26,676 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 298.91 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 94.65 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 62.9 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -109.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.84 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2864.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 751.9 MB in the end (delta: 286.3 MB). Peak memory consumption was 286.3 MB. Max. memory is 11.5 GB. * Witness Printer took 59.24 ms. Allocated memory is still 1.1 GB. Free memory was 751.9 MB in the beginning and 744.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 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 2.7s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 2.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.3s. 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: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 20ms 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@402bd1de=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@135cb257=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@675fc39d=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@61af08ca=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7b0491f3=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1e3d8564=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...