./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 871be16186d4378aec884efd2352a47ca4eb57bc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 10:31:17,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:31:17,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:31:17,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:31:17,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:31:17,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:31:17,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:31:17,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:31:17,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:31:17,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:31:17,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:31:17,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:31:17,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:31:17,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:31:17,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:31:17,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:31:17,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:31:17,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:31:17,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:31:17,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:31:17,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:31:17,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:31:17,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:31:17,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:31:17,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:31:17,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:31:17,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:31:17,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:31:17,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:31:17,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:31:17,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:31:17,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:31:17,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:31:17,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:31:17,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:31:17,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:31:17,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:31:17,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:31:17,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:31:17,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:31:17,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:31:17,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 10:31:17,132 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:31:17,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:31:17,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:31:17,133 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 10:31:17,133 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 10:31:17,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:31:17,134 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 10:31:17,135 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:31:17,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 10:31:17,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:31:17,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:31:17,135 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 10:31:17,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:31:17,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 10:31:17,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:31:17,136 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 10:31:17,136 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 10:31:17,136 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2019-12-07 10:31:17,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:31:17,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:31:17,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:31:17,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:31:17,246 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:31:17,246 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-12-07 10:31:17,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/data/ae80f9f79/80b81f3e5f284cfabb3a1e773dc88eea/FLAGfcc7a89b0 [2019-12-07 10:31:17,731 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:31:17,732 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-12-07 10:31:17,735 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/data/ae80f9f79/80b81f3e5f284cfabb3a1e773dc88eea/FLAGfcc7a89b0 [2019-12-07 10:31:17,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/data/ae80f9f79/80b81f3e5f284cfabb3a1e773dc88eea [2019-12-07 10:31:17,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:31:17,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:31:17,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:31:17,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:31:17,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:31:17,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdb8c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17, skipping insertion in model container [2019-12-07 10:31:17,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:31:17,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:31:17,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:31:17,860 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:31:17,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:31:17,909 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:31:17,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17 WrapperNode [2019-12-07 10:31:17,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:31:17,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:31:17,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:31:17,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:31:17,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:31:17,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:31:17,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:31:17,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:31:17,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... [2019-12-07 10:31:17,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:31:17,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:31:17,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:31:17,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:31:17,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:31:17,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:31:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2019-12-07 10:31:17,979 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2019-12-07 10:31:18,058 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:31:18,058 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 10:31:18,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:31:18 BoogieIcfgContainer [2019-12-07 10:31:18,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:31:18,059 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 10:31:18,059 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 10:31:18,062 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 10:31:18,062 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 10:31:18,062 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 10:31:17" (1/3) ... [2019-12-07 10:31:18,063 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7e5d4159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 10:31:18, skipping insertion in model container [2019-12-07 10:31:18,063 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 10:31:18,063 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:31:17" (2/3) ... [2019-12-07 10:31:18,063 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7e5d4159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 10:31:18, skipping insertion in model container [2019-12-07 10:31:18,063 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 10:31:18,063 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:31:18" (3/3) ... [2019-12-07 10:31:18,064 INFO L371 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2019-12-07 10:31:18,093 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 10:31:18,093 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 10:31:18,093 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 10:31:18,093 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:31:18,093 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:31:18,093 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 10:31:18,093 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:31:18,093 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 10:31:18,102 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2019-12-07 10:31:18,117 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 10:31:18,117 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 10:31:18,118 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 10:31:18,122 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 10:31:18,122 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 10:31:18,122 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 10:31:18,123 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2019-12-07 10:31:18,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 10:31:18,124 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 10:31:18,124 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 10:31:18,124 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 10:31:18,124 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 10:31:18,129 INFO L794 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 4#L16true call main_#t~ret3 := mc91(main_~x~0);< 5#mc91ENTRYtrue [2019-12-07 10:31:18,129 INFO L796 eck$LassoCheckResult]: Loop: 5#mc91ENTRYtrue ~n := #in~n; 9#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 5#mc91ENTRYtrue [2019-12-07 10:31:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1008, now seen corresponding path program 1 times [2019-12-07 10:31:18,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:18,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708608043] [2019-12-07 10:31:18,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:18,197 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash 36877, now seen corresponding path program 1 times [2019-12-07 10:31:18,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:18,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335230596] [2019-12-07 10:31:18,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:18,210 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 30036414, now seen corresponding path program 1 times [2019-12-07 10:31:18,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:18,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337302094] [2019-12-07 10:31:18,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:18,219 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:18,272 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:18,272 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:18,272 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:18,272 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:18,273 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 10:31:18,273 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:18,273 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:18,273 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:18,273 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2019-12-07 10:31:18,273 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:18,274 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:18,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:18,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:18,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:18,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:18,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:18,347 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:18,348 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:18,353 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:18,353 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:18,360 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 10:31:18,360 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:19,349 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 10:31:19,350 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:19,350 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:19,350 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:19,350 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:19,350 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 10:31:19,351 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,351 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:19,351 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:19,351 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2019-12-07 10:31:19,351 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:19,351 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:19,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,390 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:19,393 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,397 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 [2019-12-07 10:31:19,399 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:19,399 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:19,399 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:19,400 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:19,400 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:19,402 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:19,402 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:19,404 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 10:31:19,409 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 10:31:19,409 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,413 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 10:31:19,413 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 10:31:19,413 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 10:31:19,414 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2019-12-07 10:31:19,417 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 10:31:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:19,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:31:19,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:19,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 10:31:19,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:31:19,494 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 10:31:19,495 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2019-12-07 10:31:19,567 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 31 states and 38 transitions. Complement of second has 12 states. [2019-12-07 10:31:19,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 10:31:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-12-07 10:31:19,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2019-12-07 10:31:19,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:19,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2019-12-07 10:31:19,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:19,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2019-12-07 10:31:19,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:19,572 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 38 transitions. [2019-12-07 10:31:19,575 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 10:31:19,581 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 18 states and 24 transitions. [2019-12-07 10:31:19,581 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-12-07 10:31:19,582 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2019-12-07 10:31:19,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2019-12-07 10:31:19,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 10:31:19,583 INFO L688 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-12-07 10:31:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2019-12-07 10:31:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-12-07 10:31:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 10:31:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-12-07 10:31:19,603 INFO L711 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-12-07 10:31:19,604 INFO L591 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-12-07 10:31:19,604 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 10:31:19,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 20 transitions. [2019-12-07 10:31:19,605 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 10:31:19,605 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 10:31:19,605 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 10:31:19,606 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:31:19,606 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 10:31:19,606 INFO L794 eck$LassoCheckResult]: Stem: 100#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 96#L16 call main_#t~ret3 := mc91(main_~x~0);< 101#mc91ENTRY ~n := #in~n; 105#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 107#mc91ENTRY ~n := #in~n; 103#L10 assume ~n > 100;#res := ~n - 10; 104#mc91FINAL assume true; 102#mc91EXIT >#19#return; 97#L11-1 [2019-12-07 10:31:19,606 INFO L796 eck$LassoCheckResult]: Loop: 97#L11-1 call #t~ret1 := mc91(#t~ret0);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume !(~n > 100); 95#L11 call #t~ret0 := mc91(11 + ~n);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume ~n > 100;#res := ~n - 10; 99#mc91FINAL assume true; 108#mc91EXIT >#19#return; 97#L11-1 [2019-12-07 10:31:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1934452539, now seen corresponding path program 1 times [2019-12-07 10:31:19,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:19,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648213623] [2019-12-07 10:31:19,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:19,619 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 1 times [2019-12-07 10:31:19,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:19,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822529574] [2019-12-07 10:31:19,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:19,630 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash 418213862, now seen corresponding path program 1 times [2019-12-07 10:31:19,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:19,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390650892] [2019-12-07 10:31:19,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:19,650 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:19,714 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:19,715 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:19,715 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:19,715 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:19,715 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 10:31:19,715 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,715 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:19,715 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:19,715 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2019-12-07 10:31:19,715 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:19,715 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:19,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:19,755 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:19,755 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:19,758 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:19,761 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:19,761 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,765 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:19,765 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:19,769 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:19,769 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:19,773 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:19,785 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 10:31:19,785 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:31,804 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-12-07 10:31:31,808 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:31,808 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:31,808 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:31,808 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:31,808 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 10:31:31,808 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:31,808 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:31,808 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:31,809 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2019-12-07 10:31:31,809 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:31,809 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:31,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:31,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:31,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:31,848 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:31,848 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:31,851 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 [2019-12-07 10:31:31,852 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:31,852 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:31,852 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:31,852 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:31,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:31,853 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:31,853 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:31,854 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:31,858 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 [2019-12-07 10:31:31,860 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:31,860 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:31,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:31,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:31,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:31,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:31,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:31,862 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:31,866 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 [2019-12-07 10:31:31,868 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:31,868 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:31,868 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:31,868 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:31,868 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:31,869 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:31,869 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:31,871 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 10:31:31,874 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 10:31:31,875 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:31,877 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 10:31:31,877 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 10:31:31,877 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 10:31:31,878 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2019-12-07 10:31:31,880 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 10:31:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:31,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 10:31:31,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:31,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 10:31:31,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:31:32,051 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2019-12-07 10:31:32,051 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6 Second operand 9 states. [2019-12-07 10:31:32,343 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 50 states and 72 transitions. Complement of second has 32 states. [2019-12-07 10:31:32,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 10:31:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2019-12-07 10:31:32,345 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 8 letters. [2019-12-07 10:31:32,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:32,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 17 letters. Loop has 8 letters. [2019-12-07 10:31:32,347 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:32,347 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 16 letters. [2019-12-07 10:31:32,347 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:32,347 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 72 transitions. [2019-12-07 10:31:32,350 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2019-12-07 10:31:32,353 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 41 states and 61 transitions. [2019-12-07 10:31:32,353 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-12-07 10:31:32,353 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-12-07 10:31:32,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 61 transitions. [2019-12-07 10:31:32,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 10:31:32,354 INFO L688 BuchiCegarLoop]: Abstraction has 41 states and 61 transitions. [2019-12-07 10:31:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 61 transitions. [2019-12-07 10:31:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2019-12-07 10:31:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 10:31:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2019-12-07 10:31:32,359 INFO L711 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2019-12-07 10:31:32,359 INFO L591 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2019-12-07 10:31:32,359 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 10:31:32,359 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 50 transitions. [2019-12-07 10:31:32,360 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2019-12-07 10:31:32,360 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 10:31:32,360 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 10:31:32,361 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:31:32,361 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 10:31:32,361 INFO L794 eck$LassoCheckResult]: Stem: 288#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 283#L16 call main_#t~ret3 := mc91(main_~x~0);< 289#mc91ENTRY ~n := #in~n; 295#L10 assume !(~n > 100); 284#L11 call #t~ret0 := mc91(11 + ~n);< 297#mc91ENTRY ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 306#mc91FINAL assume true; 305#mc91EXIT >#19#return; 277#L11-1 call #t~ret1 := mc91(#t~ret0);< 292#mc91ENTRY ~n := #in~n; 309#L10 assume !(~n > 100); 294#L11 [2019-12-07 10:31:32,361 INFO L796 eck$LassoCheckResult]: Loop: 294#L11 call #t~ret0 := mc91(11 + ~n);< 296#mc91ENTRY ~n := #in~n; 293#L10 assume !(~n > 100); 294#L11 [2019-12-07 10:31:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash 595607827, now seen corresponding path program 2 times [2019-12-07 10:31:32,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:32,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869176123] [2019-12-07 10:31:32,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:32,371 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash 47317, now seen corresponding path program 2 times [2019-12-07 10:31:32,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:32,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730040753] [2019-12-07 10:31:32,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:32,375 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1242891907, now seen corresponding path program 3 times [2019-12-07 10:31:32,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:32,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959381149] [2019-12-07 10:31:32,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 10:31:32,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959381149] [2019-12-07 10:31:32,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:31:32,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 10:31:32,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177697568] [2019-12-07 10:31:32,461 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:32,462 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:32,462 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:32,462 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:32,462 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 10:31:32,462 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:32,462 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:32,462 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:32,462 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2019-12-07 10:31:32,462 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:32,462 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:32,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:32,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:32,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:32,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:32,503 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:32,503 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:32,505 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:32,506 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:32,508 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:32,508 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:32,512 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:32,512 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:32,515 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:32,515 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:32,519 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:32,520 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:32,531 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 10:31:32,531 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:44,543 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-12-07 10:31:44,546 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:44,546 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:44,547 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:44,547 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:44,547 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 10:31:44,547 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:44,547 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:44,547 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:44,547 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2019-12-07 10:31:44,547 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:44,547 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:44,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:44,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:44,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:44,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:44,571 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:44,571 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:44,574 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 [2019-12-07 10:31:44,575 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:44,575 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:44,575 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:44,575 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:44,575 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:44,576 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:44,576 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:44,577 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:44,581 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 [2019-12-07 10:31:44,582 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:44,582 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:44,582 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:44,582 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:44,582 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:44,582 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:44,582 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:44,583 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:44,587 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 [2019-12-07 10:31:44,588 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:44,588 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:44,589 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:44,589 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:44,589 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:44,590 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:44,590 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:44,592 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 10:31:44,594 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 10:31:44,594 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:44,597 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 10:31:44,597 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 10:31:44,597 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 10:31:44,597 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2019-12-07 10:31:44,598 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 10:31:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:44,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 10:31:44,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:44,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 10:31:44,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:31:44,662 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 10:31:44,662 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2019-12-07 10:31:56,741 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2019-12-07 10:31:56,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 10:31:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2019-12-07 10:31:56,742 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2019-12-07 10:31:56,742 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:56,742 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 10:31:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:56,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 10:31:56,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:56,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 10:31:56,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:31:56,808 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 10:31:56,808 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2019-12-07 10:31:56,909 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2019-12-07 10:31:56,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 10:31:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2019-12-07 10:31:56,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2019-12-07 10:31:56,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:56,910 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 10:31:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:56,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 10:31:56,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:56,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 10:31:56,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:31:56,977 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 10:31:56,977 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2019-12-07 10:31:57,074 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 70 states and 99 transitions. Complement of second has 16 states. [2019-12-07 10:31:57,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 10:31:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2019-12-07 10:31:57,074 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2019-12-07 10:31:57,075 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:57,075 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 15 letters. Loop has 3 letters. [2019-12-07 10:31:57,075 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:57,075 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 6 letters. [2019-12-07 10:31:57,076 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:57,076 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 70 states and 99 transitions. [2019-12-07 10:31:57,078 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-12-07 10:31:57,080 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 70 states to 47 states and 73 transitions. [2019-12-07 10:31:57,080 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-12-07 10:31:57,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2019-12-07 10:31:57,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 73 transitions. [2019-12-07 10:31:57,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 10:31:57,080 INFO L688 BuchiCegarLoop]: Abstraction has 47 states and 73 transitions. [2019-12-07 10:31:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 73 transitions. [2019-12-07 10:31:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2019-12-07 10:31:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 10:31:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2019-12-07 10:31:57,085 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 59 transitions. [2019-12-07 10:31:57,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:31:57,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 10:31:57,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 10:31:57,087 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 8 states. [2019-12-07 10:31:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:31:57,163 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-12-07 10:31:57,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 10:31:57,163 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2019-12-07 10:31:57,166 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-12-07 10:31:57,168 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 57 states and 74 transitions. [2019-12-07 10:31:57,168 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2019-12-07 10:31:57,168 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2019-12-07 10:31:57,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 74 transitions. [2019-12-07 10:31:57,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 10:31:57,169 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2019-12-07 10:31:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 74 transitions. [2019-12-07 10:31:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-12-07 10:31:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 10:31:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2019-12-07 10:31:57,174 INFO L711 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-12-07 10:31:57,174 INFO L591 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-12-07 10:31:57,175 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 10:31:57,175 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 73 transitions. [2019-12-07 10:31:57,176 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-12-07 10:31:57,176 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 10:31:57,176 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 10:31:57,177 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 10:31:57,177 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2019-12-07 10:31:57,178 INFO L794 eck$LassoCheckResult]: Stem: 818#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 819#L16 call main_#t~ret3 := mc91(main_~x~0);< 820#mc91ENTRY ~n := #in~n; 846#L10 assume !(~n > 100); 839#L11 call #t~ret0 := mc91(11 + ~n);< 841#mc91ENTRY ~n := #in~n; 844#L10 assume !(~n > 100); 838#L11 call #t~ret0 := mc91(11 + ~n);< 842#mc91ENTRY ~n := #in~n; 845#L10 assume ~n > 100;#res := ~n - 10; 843#mc91FINAL assume true; 840#mc91EXIT >#19#return; 810#L11-1 call #t~ret1 := mc91(#t~ret0);< 825#mc91ENTRY ~n := #in~n; 859#L10 assume ~n > 100;#res := ~n - 10; 858#mc91FINAL assume true; 855#mc91EXIT >#21#return; 815#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 853#mc91FINAL assume true; 852#mc91EXIT >#19#return; 814#L11-1 call #t~ret1 := mc91(#t~ret0);< 851#mc91ENTRY [2019-12-07 10:31:57,178 INFO L796 eck$LassoCheckResult]: Loop: 851#mc91ENTRY ~n := #in~n; 847#L10 assume !(~n > 100); 822#L11 call #t~ret0 := mc91(11 + ~n);< 831#mc91ENTRY ~n := #in~n; 828#L10 assume !(~n > 100); 821#L11 call #t~ret0 := mc91(11 + ~n);< 832#mc91ENTRY ~n := #in~n; 826#L10 assume ~n > 100;#res := ~n - 10; 827#mc91FINAL assume true; 833#mc91EXIT >#19#return; 807#L11-1 call #t~ret1 := mc91(#t~ret0);< 823#mc91ENTRY ~n := #in~n; 849#L10 assume ~n > 100;#res := ~n - 10; 850#mc91FINAL assume true; 854#mc91EXIT >#21#return; 815#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 853#mc91FINAL assume true; 852#mc91EXIT >#19#return; 813#L11-1 call #t~ret1 := mc91(#t~ret0);< 851#mc91ENTRY [2019-12-07 10:31:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash -104606680, now seen corresponding path program 1 times [2019-12-07 10:31:57,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:57,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469301491] [2019-12-07 10:31:57,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:57,195 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash -735472521, now seen corresponding path program 1 times [2019-12-07 10:31:57,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:57,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125983615] [2019-12-07 10:31:57,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:57,210 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:57,210 INFO L82 PathProgramCache]: Analyzing trace with hash -726341392, now seen corresponding path program 2 times [2019-12-07 10:31:57,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:57,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106371203] [2019-12-07 10:31:57,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 10:31:57,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106371203] [2019-12-07 10:31:57,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298201508] [2019-12-07 10:31:57,317 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:31:57,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:31:57,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:31:57,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 10:31:57,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 10:31:57,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:31:57,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-12-07 10:31:57,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74456541] [2019-12-07 10:31:57,483 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:57,483 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:57,483 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:57,483 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:57,483 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 10:31:57,483 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,483 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:57,483 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:57,484 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2019-12-07 10:31:57,484 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:57,484 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:57,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,509 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:57,509 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,512 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:57,512 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:57,515 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:57,515 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,519 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:57,519 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:57,521 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:57,521 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,525 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:57,526 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:57,528 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:57,528 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,532 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:57,532 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,537 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 10:31:57,537 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:57,912 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 10:31:57,914 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:57,914 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:57,914 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:57,914 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:57,914 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 10:31:57,914 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,914 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:57,914 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:57,914 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2019-12-07 10:31:57,914 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:57,914 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:57,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:57,938 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:57,939 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,941 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 [2019-12-07 10:31:57,942 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:57,942 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:57,942 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:57,942 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:57,942 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:57,943 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:57,943 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:57,944 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,948 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 [2019-12-07 10:31:57,949 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:57,949 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:57,949 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:57,949 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:57,950 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:57,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:57,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:57,951 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,955 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 [2019-12-07 10:31:57,956 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:57,957 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:57,957 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:57,957 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:57,957 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:57,957 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:57,957 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:57,958 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,963 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 [2019-12-07 10:31:57,964 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:31:57,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:31:57,964 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:31:57,964 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:31:57,964 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:31:57,965 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:31:57,965 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:31:57,967 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 10:31:57,969 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 10:31:57,969 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:57,975 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 10:31:57,975 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 10:31:57,975 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 10:31:57,975 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2019-12-07 10:31:57,977 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 10:31:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:58,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 10:31:58,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:58,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:31:58,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:31:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:58,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 10:31:58,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-07 10:31:58,147 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2019-12-07 10:31:58,147 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2019-12-07 10:31:58,420 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2019-12-07 10:31:58,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 10:31:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2019-12-07 10:31:58,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2019-12-07 10:31:58,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:58,421 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 10:31:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:58,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 10:31:58,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:58,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:31:58,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:31:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:58,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 10:31:58,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-07 10:31:58,568 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2019-12-07 10:31:58,568 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2019-12-07 10:31:58,817 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2019-12-07 10:31:58,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 10:31:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2019-12-07 10:31:58,818 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2019-12-07 10:31:58,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:58,818 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 10:31:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:58,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 10:31:58,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:58,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:31:58,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:31:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:58,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 10:31:58,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-07 10:31:58,962 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2019-12-07 10:31:58,962 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2019-12-07 10:31:59,508 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 430 states and 530 transitions. Complement of second has 216 states. [2019-12-07 10:31:59,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 2 stem states 17 non-accepting loop states 1 accepting loop states [2019-12-07 10:31:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 10:31:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 48 transitions. [2019-12-07 10:31:59,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 19 letters. [2019-12-07 10:31:59,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:59,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 40 letters. Loop has 19 letters. [2019-12-07 10:31:59,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:59,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 38 letters. [2019-12-07 10:31:59,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:31:59,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 530 transitions. [2019-12-07 10:31:59,518 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2019-12-07 10:31:59,523 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 202 states and 268 transitions. [2019-12-07 10:31:59,523 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2019-12-07 10:31:59,523 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-12-07 10:31:59,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 202 states and 268 transitions. [2019-12-07 10:31:59,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 10:31:59,524 INFO L688 BuchiCegarLoop]: Abstraction has 202 states and 268 transitions. [2019-12-07 10:31:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states and 268 transitions. [2019-12-07 10:31:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2019-12-07 10:31:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-07 10:31:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2019-12-07 10:31:59,535 INFO L711 BuchiCegarLoop]: Abstraction has 156 states and 197 transitions. [2019-12-07 10:31:59,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:31:59,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 10:31:59,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:31:59,536 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 11 states. [2019-12-07 10:31:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:31:59,675 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2019-12-07 10:31:59,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 10:31:59,676 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 158 states and 187 transitions. [2019-12-07 10:31:59,678 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-12-07 10:31:59,680 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 158 states to 103 states and 122 transitions. [2019-12-07 10:31:59,680 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2019-12-07 10:31:59,680 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 75 [2019-12-07 10:31:59,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 122 transitions. [2019-12-07 10:31:59,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 10:31:59,681 INFO L688 BuchiCegarLoop]: Abstraction has 103 states and 122 transitions. [2019-12-07 10:31:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states and 122 transitions. [2019-12-07 10:31:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2019-12-07 10:31:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-07 10:31:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2019-12-07 10:31:59,686 INFO L711 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-12-07 10:31:59,686 INFO L591 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-12-07 10:31:59,686 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 10:31:59,686 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2019-12-07 10:31:59,687 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-12-07 10:31:59,687 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 10:31:59,687 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 10:31:59,688 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1] [2019-12-07 10:31:59,688 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 10:31:59,688 INFO L794 eck$LassoCheckResult]: Stem: 2845#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 2846#L16 call main_#t~ret3 := mc91(main_~x~0);< 2847#mc91ENTRY ~n := #in~n; 2854#L10 assume !(~n > 100); 2855#L11 call #t~ret0 := mc91(11 + ~n);< 2877#mc91ENTRY ~n := #in~n; 2879#L10 assume !(~n > 100); 2878#L11 call #t~ret0 := mc91(11 + ~n);< 2896#mc91ENTRY ~n := #in~n; 2898#L10 assume ~n > 100;#res := ~n - 10; 2897#mc91FINAL assume true; 2895#mc91EXIT >#19#return; 2891#L11-1 call #t~ret1 := mc91(#t~ret0);< 2893#mc91ENTRY ~n := #in~n; 2910#L10 assume ~n > 100;#res := ~n - 10; 2899#mc91FINAL assume true; 2890#mc91EXIT >#21#return; 2889#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2887#mc91FINAL assume true; 2886#mc91EXIT >#19#return; 2880#L11-1 call #t~ret1 := mc91(#t~ret0);< 2885#mc91ENTRY ~n := #in~n; 2883#L10 assume !(~n > 100); 2848#L11 call #t~ret0 := mc91(11 + ~n);< 2858#mc91ENTRY ~n := #in~n; 2888#L10 assume !(~n > 100); 2840#L11 call #t~ret0 := mc91(11 + ~n);< 2859#mc91ENTRY ~n := #in~n; 2864#L10 assume ~n > 100;#res := ~n - 10; 2929#mc91FINAL assume true; 2839#mc91EXIT >#19#return; 2841#L11-1 [2019-12-07 10:31:59,688 INFO L796 eck$LassoCheckResult]: Loop: 2841#L11-1 call #t~ret1 := mc91(#t~ret0);< 2849#mc91ENTRY ~n := #in~n; 2926#L10 assume !(~n > 100); 2856#L11 call #t~ret0 := mc91(11 + ~n);< 2857#mc91ENTRY ~n := #in~n; 2931#L10 assume ~n > 100;#res := ~n - 10; 2930#mc91FINAL assume true; 2928#mc91EXIT >#19#return; 2841#L11-1 [2019-12-07 10:31:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1788916079, now seen corresponding path program 3 times [2019-12-07 10:31:59,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:59,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152642980] [2019-12-07 10:31:59,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:31:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-12-07 10:31:59,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152642980] [2019-12-07 10:31:59,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732843290] [2019-12-07 10:31:59,736 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:31:59,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 10:31:59,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:31:59,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 10:31:59,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:31:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 10:31:59,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 10:31:59,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2019-12-07 10:31:59,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371182299] [2019-12-07 10:31:59,764 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 10:31:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:31:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 2 times [2019-12-07 10:31:59,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:31:59,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607426323] [2019-12-07 10:31:59,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:31:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:31:59,769 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 10:31:59,827 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:31:59,827 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:31:59,827 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:31:59,827 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:31:59,827 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 10:31:59,828 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:59,828 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:31:59,828 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:31:59,828 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2019-12-07 10:31:59,828 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:31:59,828 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:31:59,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:59,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:59,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:31:59,857 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:31:59,857 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:59,860 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:59,860 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:31:59,863 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 10:31:59,863 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:59,867 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 10:31:59,867 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:31:59,882 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 10:31:59,882 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 10:32:11,899 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-12-07 10:32:11,903 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 10:32:11,903 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 10:32:11,903 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 10:32:11,903 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 10:32:11,904 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 10:32:11,904 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:32:11,904 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 10:32:11,904 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 10:32:11,904 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2019-12-07 10:32:11,904 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 10:32:11,904 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 10:32:11,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:32:11,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:32:11,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 10:32:11,934 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 10:32:11,934 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:32:11,937 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 [2019-12-07 10:32:11,938 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:32:11,938 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:32:11,938 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:32:11,938 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:32:11,938 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:32:11,938 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:32:11,938 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:32:11,939 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:32:11,944 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 [2019-12-07 10:32:11,945 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 10:32:11,945 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 10:32:11,945 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 10:32:11,945 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 10:32:11,945 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 10:32:11,946 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 10:32:11,946 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 10:32:11,948 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 10:32:11,950 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 10:32:11,950 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46c2f46f-38a5-4d36-8027-089a7b42f73b/bin/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 10:32:11,953 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 10:32:11,953 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 10:32:11,953 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 10:32:11,953 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2019-12-07 10:32:11,954 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 10:32:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:32:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:32:11,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 10:32:11,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:32:11,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:32:11,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:32:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:32:12,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 10:32:12,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:32:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:32:12,086 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2019-12-07 10:32:12,086 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2019-12-07 10:32:12,351 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2019-12-07 10:32:12,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-12-07 10:32:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 10:32:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2019-12-07 10:32:12,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2019-12-07 10:32:12,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:32:12,353 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 10:32:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:32:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:32:12,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 10:32:12,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:32:12,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:32:12,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:32:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:32:12,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 10:32:12,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:32:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:32:12,495 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2019-12-07 10:32:12,495 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2019-12-07 10:32:12,689 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2019-12-07 10:32:12,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-12-07 10:32:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 10:32:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2019-12-07 10:32:12,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2019-12-07 10:32:12,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:32:12,690 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 10:32:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:32:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:32:12,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 10:32:12,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:32:12,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:32:12,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 10:32:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:32:12,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 10:32:12,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:32:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:32:12,810 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2019-12-07 10:32:12,810 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2019-12-07 10:32:13,014 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 180 states and 210 transitions. Complement of second has 27 states. [2019-12-07 10:32:13,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-12-07 10:32:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 10:32:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2019-12-07 10:32:13,015 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 8 letters. [2019-12-07 10:32:13,015 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:32:13,016 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 39 letters. Loop has 8 letters. [2019-12-07 10:32:13,016 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:32:13,016 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 16 letters. [2019-12-07 10:32:13,017 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 10:32:13,017 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 210 transitions. [2019-12-07 10:32:13,020 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 10:32:13,020 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2019-12-07 10:32:13,020 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 10:32:13,020 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 10:32:13,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 10:32:13,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 10:32:13,020 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:32:13,020 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:32:13,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:32:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 10:32:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:32:13,020 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 9 states. [2019-12-07 10:32:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:32:13,021 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 10:32:13,021 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 10:32:13,021 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 10:32:13,021 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 10:32:13,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 10:32:13,021 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:32:13,021 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-12-07 10:32:13,021 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 10:32:13,022 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 10:32:13,022 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 10:32:13,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 10:32:13 BoogieIcfgContainer [2019-12-07 10:32:13,026 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 10:32:13,026 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:32:13,026 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:32:13,027 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:32:13,027 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:31:18" (3/4) ... [2019-12-07 10:32:13,029 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 10:32:13,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:32:13,031 INFO L168 Benchmark]: Toolchain (without parser) took 55283.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 946.3 MB in the beginning and 1.0 GB in the end (delta: -99.3 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. [2019-12-07 10:32:13,031 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:32:13,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.94 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -159.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 10:32:13,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.42 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. [2019-12-07 10:32:13,032 INFO L168 Benchmark]: Boogie Preprocessor took 9.81 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. [2019-12-07 10:32:13,033 INFO L168 Benchmark]: RCFGBuilder took 119.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-12-07 10:32:13,033 INFO L168 Benchmark]: BuchiAutomizer took 54966.74 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 23.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 40.1 MB). Peak memory consumption was 63.2 MB. Max. memory is 11.5 GB. [2019-12-07 10:32:13,033 INFO L168 Benchmark]: Witness Printer took 3.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:32:13,036 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 161.94 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -159.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.42 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. * Boogie Preprocessor took 9.81 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 119.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 54966.74 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 23.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 40.1 MB). Peak memory consumption was 63.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. 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 8 terminating modules (3 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(n) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(n) + 90 and consists of 20 locations. One nondeterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. 3 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 54.9s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 38.8s. Construction of modules took 12.7s. Büchi inclusion checks took 3.1s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 65 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 99 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 12/24 HoareTripleCheckerStatistics: 154 SDtfs, 272 SDslu, 161 SDs, 0 SdLazy, 745 SolverSat, 236 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf92 smp100 dnf100 smp100 tf109 neg100 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 37.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...