./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 0.1.23-635dfa2 [2018-12-09 10:22:38,082 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 10:22:38,083 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 10:22:38,091 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 10:22:38,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 10:22:38,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 10:22:38,093 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 10:22:38,094 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 10:22:38,095 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 10:22:38,096 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 10:22:38,096 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 10:22:38,097 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 10:22:38,097 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 10:22:38,098 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 10:22:38,099 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 10:22:38,099 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 10:22:38,100 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 10:22:38,101 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 10:22:38,103 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 10:22:38,104 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 10:22:38,104 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 10:22:38,105 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 10:22:38,107 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 10:22:38,107 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 10:22:38,107 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 10:22:38,108 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 10:22:38,108 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 10:22:38,109 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 10:22:38,109 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 10:22:38,110 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 10:22:38,110 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 10:22:38,111 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 10:22:38,111 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 10:22:38,111 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 10:22:38,112 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 10:22:38,112 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 10:22:38,112 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-12-09 10:22:38,121 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 10:22:38,121 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 10:22:38,122 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 10:22:38,122 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 10:22:38,122 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 10:22:38,122 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-09 10:22:38,122 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-09 10:22:38,122 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-09 10:22:38,123 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-09 10:22:38,123 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-09 10:22:38,123 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-09 10:22:38,123 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 10:22:38,123 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 10:22:38,123 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 10:22:38,123 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 10:22:38,124 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-09 10:22:38,125 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 10:22:38,125 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 10:22:38,125 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-09 10:22:38,125 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 10:22:38,125 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 10:22:38,125 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-09 10:22:38,126 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-09 10:22:38,126 INFO L133 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:38,148 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 10:22:38,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 10:22:38,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 10:22:38,158 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 10:22:38,158 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 10:22:38,159 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-09 10:22:38,193 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/data/d5aef31fe/3ecc57e19e7f4d5c95515389824caefe/FLAG0226c4e80 [2018-12-09 10:22:38,503 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 10:22:38,504 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-09 10:22:38,507 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/data/d5aef31fe/3ecc57e19e7f4d5c95515389824caefe/FLAG0226c4e80 [2018-12-09 10:22:38,931 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/data/d5aef31fe/3ecc57e19e7f4d5c95515389824caefe [2018-12-09 10:22:38,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 10:22:38,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 10:22:38,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 10:22:38,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 10:22:38,936 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 10:22:38,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:22:38" (1/1) ... [2018-12-09 10:22:38,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c93d57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:38, skipping insertion in model container [2018-12-09 10:22:38,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:22:38" (1/1) ... [2018-12-09 10:22:38,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 10:22:38,951 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 10:22:39,027 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 10:22:39,029 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 10:22:39,036 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 10:22:39,044 INFO L195 MainTranslator]: Completed translation [2018-12-09 10:22:39,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39 WrapperNode [2018-12-09 10:22:39,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 10:22:39,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 10:22:39,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 10:22:39,045 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 10:22:39,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 10:22:39,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 10:22:39,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 10:22:39,063 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 10:22:39,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... [2018-12-09 10:22:39,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 10:22:39,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 10:22:39,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 10:22:39,072 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 10:22:39,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 10:22:39,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 10:22:39,133 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2018-12-09 10:22:39,133 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2018-12-09 10:22:39,206 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 10:22:39,206 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-09 10:22:39,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:22:39 BoogieIcfgContainer [2018-12-09 10:22:39,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 10:22:39,207 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-09 10:22:39,207 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-09 10:22:39,209 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-09 10:22:39,210 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 10:22:39,210 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.12 10:22:38" (1/3) ... [2018-12-09 10:22:39,211 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@72e70b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.12 10:22:39, skipping insertion in model container [2018-12-09 10:22:39,211 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 10:22:39,211 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:22:39" (2/3) ... [2018-12-09 10:22:39,211 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@72e70b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.12 10:22:39, skipping insertion in model container [2018-12-09 10:22:39,211 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 10:22:39,211 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:22:39" (3/3) ... [2018-12-09 10:22:39,213 INFO L375 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-09 10:22:39,249 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 10:22:39,249 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-09 10:22:39,249 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-09 10:22:39,249 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-09 10:22:39,249 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 10:22:39,250 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 10:22:39,250 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-09 10:22:39,250 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 10:22:39,250 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-09 10:22:39,259 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2018-12-09 10:22:39,276 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-09 10:22:39,276 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 10:22:39,276 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 10:22:39,281 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-09 10:22:39,281 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 10:22:39,281 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-09 10:22:39,282 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2018-12-09 10:22:39,283 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-09 10:22:39,283 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 10:22:39,283 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 10:22:39,283 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-09 10:22:39,283 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 10:22:39,288 INFO L794 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 4#L16true call main_#t~ret3 := mc91(main_~x~0);< 5#mc91ENTRYtrue [2018-12-09 10:22:39,288 INFO L796 eck$LassoCheckResult]: Loop: 5#mc91ENTRYtrue ~n := #in~n; 9#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 5#mc91ENTRYtrue [2018-12-09 10:22:39,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1008, now seen corresponding path program 1 times [2018-12-09 10:22:39,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:39,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:39,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:39,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash 36877, now seen corresponding path program 1 times [2018-12-09 10:22:39,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:39,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:39,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:39,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash 30036414, now seen corresponding path program 1 times [2018-12-09 10:22:39,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:39,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:39,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:39,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,417 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:22:39,418 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:22:39,418 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:22:39,418 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:22:39,418 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 10:22:39,418 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:22:39,418 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:22:39,419 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:22:39,419 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-12-09 10:22:39,419 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:22:39,419 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:22:39,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,481 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:22:39,482 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,485 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:39,485 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,503 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 10:22:39,503 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:22:39,521 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 10:22:39,522 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:22:39,522 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:22:39,522 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:22:39,522 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:22:39,523 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 10:22:39,523 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:22:39,523 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:22:39,523 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:22:39,523 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-12-09 10:22:39,523 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:22:39,523 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:22:39,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,534 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,569 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:22:39,572 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 10:22:39,573 INFO L122 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 [2018-12-09 10:22:39,574 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:22:39,575 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:22:39,575 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:22:39,575 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:22:39,575 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:22:39,577 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:22:39,577 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:22:39,584 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 10:22:39,589 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-09 10:22:39,589 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 10:22:39,591 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 10:22:39,591 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 10:22:39,592 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 10:22:39,592 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2018-12-09 10:22:39,593 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 10:22:39,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:22:39,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:22:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:22:39,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:22:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:22:39,674 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 [2018-12-09 10:22:39,675 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2018-12-09 10:22:39,739 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. [2018-12-09 10:22:39,740 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 [2018-12-09 10:22:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-09 10:22:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-12-09 10:22:39,742 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2018-12-09 10:22:39,742 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:22:39,742 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2018-12-09 10:22:39,742 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:22:39,742 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2018-12-09 10:22:39,742 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:22:39,743 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 38 transitions. [2018-12-09 10:22:39,745 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-09 10:22:39,748 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 18 states and 24 transitions. [2018-12-09 10:22:39,749 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-12-09 10:22:39,749 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-12-09 10:22:39,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2018-12-09 10:22:39,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 10:22:39,750 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2018-12-09 10:22:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2018-12-09 10:22:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2018-12-09 10:22:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 10:22:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2018-12-09 10:22:39,768 INFO L728 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-12-09 10:22:39,768 INFO L608 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-12-09 10:22:39,768 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-09 10:22:39,768 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 20 transitions. [2018-12-09 10:22:39,769 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-09 10:22:39,769 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 10:22:39,769 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 10:22:39,769 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 10:22:39,769 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-12-09 10:22:39,770 INFO L794 eck$LassoCheckResult]: Stem: 100#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 96#L16 call main_#t~ret3 := mc91(main_~x~0);< 101#mc91ENTRY ~n := #in~n; 105#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 107#mc91ENTRY ~n := #in~n; 103#L10 assume ~n > 100;#res := ~n - 10; 104#mc91FINAL assume true; 102#mc91EXIT >#19#return; 97#L11-1 [2018-12-09 10:22:39,770 INFO L796 eck$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 [2018-12-09 10:22:39,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1934452539, now seen corresponding path program 1 times [2018-12-09 10:22:39,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:39,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:39,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:39,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 1 times [2018-12-09 10:22:39,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:39,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:39,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:39,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 418213862, now seen corresponding path program 1 times [2018-12-09 10:22:39,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:39,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:39,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:39,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:39,855 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:22:39,855 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:22:39,855 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:22:39,855 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:22:39,855 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 10:22:39,855 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:22:39,855 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:22:39,855 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:22:39,855 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-09 10:22:39,855 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:22:39,855 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:22:39,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:39,892 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:22:39,892 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,894 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:39,894 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:22:39,898 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:22:39,898 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,921 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:39,921 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:22:39,923 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:22:39,923 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,938 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:39,938 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:39,961 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 10:22:39,961 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:22:51,989 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-12-09 10:22:51,991 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:22:51,992 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:22:51,992 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:22:51,992 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:22:51,992 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 10:22:51,992 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:22:51,992 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:22:51,992 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:22:51,992 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-09 10:22:51,992 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:22:51,992 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:22:51,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:51,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:51,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:52,041 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:22:52,041 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 10:22:52,042 INFO L122 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 [2018-12-09 10:22:52,042 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:22:52,042 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:22:52,043 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:22:52,043 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:22:52,043 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:22:52,043 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:22:52,043 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:22:52,044 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:22:52,045 INFO L122 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 [2018-12-09 10:22:52,045 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:22:52,045 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:22:52,045 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:22:52,045 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:22:52,045 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:22:52,046 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:22:52,046 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:22:52,046 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:22:52,047 INFO L122 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 [2018-12-09 10:22:52,047 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:22:52,047 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:22:52,047 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:22:52,047 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:22:52,048 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:22:52,048 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:22:52,048 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:22:52,053 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 10:22:52,056 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-09 10:22:52,056 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 10:22:52,056 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 10:22:52,057 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 10:22:52,057 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 10:22:52,057 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-12-09 10:22:52,057 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 10:22:52,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:22:52,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:22:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:22:52,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:22:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:22:52,175 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 [2018-12-09 10:22:52,175 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6 Second operand 9 states. [2018-12-09 10:22:52,349 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. [2018-12-09 10:22:52,349 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 [2018-12-09 10:22:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-09 10:22:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-12-09 10:22:52,351 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 8 letters. [2018-12-09 10:22:52,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:22:52,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 17 letters. Loop has 8 letters. [2018-12-09 10:22:52,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:22:52,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 16 letters. [2018-12-09 10:22:52,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:22:52,353 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 72 transitions. [2018-12-09 10:22:52,355 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-12-09 10:22:52,357 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 41 states and 61 transitions. [2018-12-09 10:22:52,357 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-12-09 10:22:52,357 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-12-09 10:22:52,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 61 transitions. [2018-12-09 10:22:52,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 10:22:52,357 INFO L705 BuchiCegarLoop]: Abstraction has 41 states and 61 transitions. [2018-12-09 10:22:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 61 transitions. [2018-12-09 10:22:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2018-12-09 10:22:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 10:22:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2018-12-09 10:22:52,361 INFO L728 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2018-12-09 10:22:52,361 INFO L608 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2018-12-09 10:22:52,361 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-09 10:22:52,361 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 50 transitions. [2018-12-09 10:22:52,362 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-12-09 10:22:52,362 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 10:22:52,362 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 10:22:52,362 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 10:22:52,362 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-09 10:22:52,363 INFO L794 eck$LassoCheckResult]: Stem: 288#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 283#L16 call main_#t~ret3 := mc91(main_~x~0);< 289#mc91ENTRY ~n := #in~n; 295#L10 assume !(~n > 100); 284#L11 call #t~ret0 := mc91(11 + ~n);< 297#mc91ENTRY ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 306#mc91FINAL assume true; 305#mc91EXIT >#19#return; 277#L11-1 call #t~ret1 := mc91(#t~ret0);< 292#mc91ENTRY ~n := #in~n; 309#L10 assume !(~n > 100); 294#L11 [2018-12-09 10:22:52,363 INFO L796 eck$LassoCheckResult]: Loop: 294#L11 call #t~ret0 := mc91(11 + ~n);< 296#mc91ENTRY ~n := #in~n; 293#L10 assume !(~n > 100); 294#L11 [2018-12-09 10:22:52,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash 595607827, now seen corresponding path program 2 times [2018-12-09 10:22:52,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:52,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:52,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:52,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:22:52,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:52,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 47317, now seen corresponding path program 2 times [2018-12-09 10:22:52,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:52,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:52,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:52,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 10:22:52,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:22:52,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:22:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1242891907, now seen corresponding path program 3 times [2018-12-09 10:22:52,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:22:52,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:22:52,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:52,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 10:22:52,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:22:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:22:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 10:22:52,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:22:52,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 10:22:52,452 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:22:52,452 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:22:52,452 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:22:52,452 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:22:52,452 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 10:22:52,452 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:22:52,452 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:22:52,452 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:22:52,453 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-09 10:22:52,453 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:22:52,453 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:22:52,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:52,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:52,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:52,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:22:52,479 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:22:52,479 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:52,481 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:52,482 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:22:52,483 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:22:52,484 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:52,498 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:52,498 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:22:52,500 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:22:52,500 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:52,514 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:22:52,515 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:22:52,535 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 10:22:52,535 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:04,557 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-12-09 10:23:04,559 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:23:04,560 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:23:04,560 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:23:04,560 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:23:04,560 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 10:23:04,560 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:23:04,560 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:23:04,560 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:23:04,560 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-09 10:23:04,560 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:23:04,560 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:23:04,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:04,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:04,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:04,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:04,586 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:23:04,586 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 10:23:04,586 INFO L122 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 [2018-12-09 10:23:04,586 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:04,586 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:04,587 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:04,587 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:04,587 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:04,587 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:04,587 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:04,588 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:23:04,588 INFO L122 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 [2018-12-09 10:23:04,589 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:04,589 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:04,589 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:04,589 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:04,589 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:04,589 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:04,589 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:04,590 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:23:04,590 INFO L122 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 [2018-12-09 10:23:04,591 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:04,591 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:04,591 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:04,591 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:04,591 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:04,592 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:04,592 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:04,595 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 10:23:04,597 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-09 10:23:04,597 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 10:23:04,598 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 10:23:04,598 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 10:23:04,598 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 10:23:04,598 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2018-12-09 10:23:04,598 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 10:23:04,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:04,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:04,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:23:04,652 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 [2018-12-09 10:23:04,652 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-12-09 10:23:04,698 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. [2018-12-09 10:23:04,698 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 [2018-12-09 10:23:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 10:23:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-12-09 10:23:04,698 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2018-12-09 10:23:04,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:04,699 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 10:23:04,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:04,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:04,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:23:04,761 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 [2018-12-09 10:23:04,761 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-12-09 10:23:04,802 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. [2018-12-09 10:23:04,802 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 [2018-12-09 10:23:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 10:23:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-12-09 10:23:04,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2018-12-09 10:23:04,803 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:04,803 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 10:23:04,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:04,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:04,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:23:04,874 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 [2018-12-09 10:23:04,874 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-12-09 10:23:04,938 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. [2018-12-09 10:23:04,938 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 [2018-12-09 10:23:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-09 10:23:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2018-12-09 10:23:04,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2018-12-09 10:23:04,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:04,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 15 letters. Loop has 3 letters. [2018-12-09 10:23:04,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:04,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 6 letters. [2018-12-09 10:23:04,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:04,940 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 70 states and 99 transitions. [2018-12-09 10:23:04,941 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-12-09 10:23:04,942 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 70 states to 47 states and 73 transitions. [2018-12-09 10:23:04,942 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-12-09 10:23:04,943 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-12-09 10:23:04,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 73 transitions. [2018-12-09 10:23:04,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 10:23:04,943 INFO L705 BuchiCegarLoop]: Abstraction has 47 states and 73 transitions. [2018-12-09 10:23:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 73 transitions. [2018-12-09 10:23:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2018-12-09 10:23:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-09 10:23:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2018-12-09 10:23:04,946 INFO L728 BuchiCegarLoop]: Abstraction has 41 states and 59 transitions. [2018-12-09 10:23:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 10:23:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-09 10:23:04,948 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 8 states. [2018-12-09 10:23:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:23:05,023 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2018-12-09 10:23:05,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 10:23:05,023 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2018-12-09 10:23:05,025 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-12-09 10:23:05,026 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 57 states and 74 transitions. [2018-12-09 10:23:05,026 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2018-12-09 10:23:05,026 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2018-12-09 10:23:05,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 74 transitions. [2018-12-09 10:23:05,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 10:23:05,027 INFO L705 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-12-09 10:23:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 74 transitions. [2018-12-09 10:23:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-12-09 10:23:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 10:23:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2018-12-09 10:23:05,030 INFO L728 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2018-12-09 10:23:05,030 INFO L608 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2018-12-09 10:23:05,030 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-09 10:23:05,030 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 73 transitions. [2018-12-09 10:23:05,031 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-12-09 10:23:05,031 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 10:23:05,031 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 10:23:05,031 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-12-09 10:23:05,031 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2018-12-09 10:23:05,032 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 815#L16 call main_#t~ret3 := mc91(main_~x~0);< 816#mc91ENTRY ~n := #in~n; 842#L10 assume !(~n > 100); 834#L11 call #t~ret0 := mc91(11 + ~n);< 838#mc91ENTRY ~n := #in~n; 840#L10 assume !(~n > 100); 835#L11 call #t~ret0 := mc91(11 + ~n);< 837#mc91ENTRY ~n := #in~n; 841#L10 assume ~n > 100;#res := ~n - 10; 839#mc91FINAL assume true; 836#mc91EXIT >#19#return; 804#L11-1 call #t~ret1 := mc91(#t~ret0);< 821#mc91ENTRY ~n := #in~n; 855#L10 assume ~n > 100;#res := ~n - 10; 853#mc91FINAL assume true; 851#mc91EXIT >#21#return; 811#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 848#mc91FINAL assume true; 847#mc91EXIT >#19#return; 809#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY [2018-12-09 10:23:05,032 INFO L796 eck$LassoCheckResult]: Loop: 846#mc91ENTRY ~n := #in~n; 843#L10 assume !(~n > 100); 818#L11 call #t~ret0 := mc91(11 + ~n);< 827#mc91ENTRY ~n := #in~n; 824#L10 assume !(~n > 100); 817#L11 call #t~ret0 := mc91(11 + ~n);< 828#mc91ENTRY ~n := #in~n; 822#L10 assume ~n > 100;#res := ~n - 10; 823#mc91FINAL assume true; 857#mc91EXIT >#19#return; 805#L11-1 call #t~ret1 := mc91(#t~ret0);< 819#mc91ENTRY ~n := #in~n; 844#L10 assume ~n > 100;#res := ~n - 10; 845#mc91FINAL assume true; 849#mc91EXIT >#21#return; 811#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 848#mc91FINAL assume true; 847#mc91EXIT >#19#return; 810#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY [2018-12-09 10:23:05,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash -104606680, now seen corresponding path program 1 times [2018-12-09 10:23:05,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:23:05,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:23:05,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:05,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 10:23:05,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:23:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:23:05,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash -735472521, now seen corresponding path program 1 times [2018-12-09 10:23:05,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:23:05,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:23:05,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:05,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:23:05,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:23:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:23:05,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash -726341392, now seen corresponding path program 2 times [2018-12-09 10:23:05,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:23:05,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:23:05,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:05,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:23:05,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-09 10:23:05,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:23:05,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 10:23:05,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 10:23:05,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 10:23:05,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 10:23:05,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-09 10:23:05,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 10:23:05,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-09 10:23:05,262 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:23:05,262 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:23:05,262 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:23:05,262 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:23:05,263 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 10:23:05,263 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:23:05,263 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:23:05,263 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:23:05,263 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-12-09 10:23:05,263 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:23:05,263 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:23:05,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,288 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:23:05,288 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:05,290 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:23:05,290 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:05,293 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:23:05,293 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:05,309 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:23:05,309 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:05,311 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:23:05,311 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:05,327 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:23:05,328 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:05,329 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:23:05,330 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:05,345 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:23:05,345 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:05,362 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 10:23:05,362 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:05,388 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 10:23:05,390 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:23:05,390 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:23:05,390 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:23:05,390 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:23:05,390 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 10:23:05,390 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:23:05,390 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:23:05,390 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:23:05,390 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-12-09 10:23:05,390 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:23:05,391 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:23:05,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:05,416 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:23:05,416 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 10:23:05,416 INFO L122 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 [2018-12-09 10:23:05,416 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:05,417 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:05,417 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:05,417 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:05,417 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:05,417 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:05,417 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:05,418 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:23:05,418 INFO L122 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 [2018-12-09 10:23:05,418 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:05,419 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:05,419 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:05,419 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:05,419 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:05,419 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:05,419 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:05,420 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:23:05,420 INFO L122 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 [2018-12-09 10:23:05,421 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:05,421 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:05,421 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:05,421 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:05,421 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:05,421 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:05,422 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:05,422 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:23:05,422 INFO L122 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 [2018-12-09 10:23:05,423 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:05,423 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:05,423 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:05,423 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:05,423 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:05,424 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:05,424 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:05,426 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 10:23:05,428 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-09 10:23:05,428 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 10:23:05,428 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 10:23:05,428 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 10:23:05,428 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 10:23:05,428 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2018-12-09 10:23:05,428 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 10:23:05,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:05,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:05,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 10:23:05,569 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 [2018-12-09 10:23:05,569 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-12-09 10:23:05,801 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. [2018-12-09 10:23:05,802 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 [2018-12-09 10:23:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-09 10:23:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2018-12-09 10:23:05,802 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2018-12-09 10:23:05,803 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:05,803 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 10:23:05,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:05,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:05,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 10:23:05,954 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 [2018-12-09 10:23:05,954 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-12-09 10:23:06,171 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. [2018-12-09 10:23:06,172 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 [2018-12-09 10:23:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-09 10:23:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2018-12-09 10:23:06,173 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2018-12-09 10:23:06,173 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:06,173 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 10:23:06,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:06,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:06,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 10:23:06,307 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 [2018-12-09 10:23:06,307 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-12-09 10:23:06,772 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. [2018-12-09 10:23:06,772 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 [2018-12-09 10:23:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-09 10:23:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 48 transitions. [2018-12-09 10:23:06,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 19 letters. [2018-12-09 10:23:06,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:06,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 40 letters. Loop has 19 letters. [2018-12-09 10:23:06,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:06,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 38 letters. [2018-12-09 10:23:06,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:06,774 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 530 transitions. [2018-12-09 10:23:06,779 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2018-12-09 10:23:06,782 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 202 states and 268 transitions. [2018-12-09 10:23:06,782 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2018-12-09 10:23:06,782 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2018-12-09 10:23:06,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 202 states and 268 transitions. [2018-12-09 10:23:06,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 10:23:06,783 INFO L705 BuchiCegarLoop]: Abstraction has 202 states and 268 transitions. [2018-12-09 10:23:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states and 268 transitions. [2018-12-09 10:23:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2018-12-09 10:23:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-12-09 10:23:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2018-12-09 10:23:06,793 INFO L728 BuchiCegarLoop]: Abstraction has 156 states and 197 transitions. [2018-12-09 10:23:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 10:23:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-09 10:23:06,793 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 9 states. [2018-12-09 10:23:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:23:06,924 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2018-12-09 10:23:06,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 10:23:06,924 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 158 states and 187 transitions. [2018-12-09 10:23:06,926 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-12-09 10:23:06,927 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 158 states to 103 states and 122 transitions. [2018-12-09 10:23:06,927 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2018-12-09 10:23:06,927 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 75 [2018-12-09 10:23:06,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 122 transitions. [2018-12-09 10:23:06,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 10:23:06,927 INFO L705 BuchiCegarLoop]: Abstraction has 103 states and 122 transitions. [2018-12-09 10:23:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states and 122 transitions. [2018-12-09 10:23:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-09 10:23:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-09 10:23:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-12-09 10:23:06,931 INFO L728 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-12-09 10:23:06,931 INFO L608 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-12-09 10:23:06,931 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-09 10:23:06,931 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2018-12-09 10:23:06,932 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-12-09 10:23:06,932 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 10:23:06,932 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 10:23:06,932 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1] [2018-12-09 10:23:06,932 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-12-09 10:23:06,933 INFO L794 eck$LassoCheckResult]: Stem: 2791#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 2792#L16 call main_#t~ret3 := mc91(main_~x~0);< 2793#mc91ENTRY ~n := #in~n; 2835#L10 assume !(~n > 100); 2810#L11 call #t~ret0 := mc91(11 + ~n);< 2811#mc91ENTRY ~n := #in~n; 2829#L10 assume !(~n > 100); 2823#L11 call #t~ret0 := mc91(11 + ~n);< 2827#mc91ENTRY ~n := #in~n; 2830#L10 assume ~n > 100;#res := ~n - 10; 2828#mc91FINAL assume true; 2826#mc91EXIT >#19#return; 2822#L11-1 call #t~ret1 := mc91(#t~ret0);< 2825#mc91ENTRY ~n := #in~n; 2852#L10 assume ~n > 100;#res := ~n - 10; 2844#mc91FINAL assume true; 2843#mc91EXIT >#21#return; 2841#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2840#mc91FINAL assume true; 2839#mc91EXIT >#19#return; 2831#L11-1 call #t~ret1 := mc91(#t~ret0);< 2838#mc91ENTRY ~n := #in~n; 2836#L10 assume !(~n > 100); 2803#L11 call #t~ret0 := mc91(11 + ~n);< 2812#mc91ENTRY ~n := #in~n; 2802#L10 assume !(~n > 100); 2795#L11 call #t~ret0 := mc91(11 + ~n);< 2834#mc91ENTRY ~n := #in~n; 2883#L10 assume ~n > 100;#res := ~n - 10; 2882#mc91FINAL assume true; 2794#mc91EXIT >#19#return; 2796#L11-1 [2018-12-09 10:23:06,933 INFO L796 eck$LassoCheckResult]: Loop: 2796#L11-1 call #t~ret1 := mc91(#t~ret0);< 2804#mc91ENTRY ~n := #in~n; 2819#L10 assume !(~n > 100); 2808#L11 call #t~ret0 := mc91(11 + ~n);< 2809#mc91ENTRY ~n := #in~n; 2881#L10 assume ~n > 100;#res := ~n - 10; 2880#mc91FINAL assume true; 2879#mc91EXIT >#19#return; 2796#L11-1 [2018-12-09 10:23:06,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1788916079, now seen corresponding path program 3 times [2018-12-09 10:23:06,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:23:06,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:23:06,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:06,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 10:23:06,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-12-09 10:23:06,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:23:06,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 10:23:06,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 10:23:06,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 10:23:06,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 10:23:06,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 10:23:07,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 10:23:07,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2018-12-09 10:23:07,009 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-09 10:23:07,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 2 times [2018-12-09 10:23:07,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 10:23:07,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 10:23:07,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:07,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 10:23:07,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:23:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:23:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:23:07,059 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:23:07,059 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:23:07,059 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:23:07,059 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:23:07,059 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 10:23:07,059 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:23:07,060 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:23:07,060 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:23:07,060 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-12-09 10:23:07,060 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:23:07,060 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:23:07,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:07,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:07,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:07,084 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:23:07,084 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:07,087 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:23:07,087 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:07,089 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 10:23:07,089 INFO L448 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/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:07,103 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 10:23:07,103 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1c4cb92-0135-4630-a15b-21c3c7400ec3/bin-2019/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 [2018-12-09 10:23:07,122 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 10:23:07,122 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 10:23:19,148 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-12-09 10:23:19,151 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 10:23:19,151 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 10:23:19,151 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 10:23:19,151 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 10:23:19,151 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 10:23:19,151 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 10:23:19,152 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 10:23:19,152 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 10:23:19,152 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-12-09 10:23:19,152 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 10:23:19,152 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 10:23:19,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:19,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:19,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 10:23:19,178 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 10:23:19,178 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 10:23:19,179 INFO L122 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 [2018-12-09 10:23:19,179 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:19,179 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:19,179 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:19,179 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:19,179 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:19,180 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:19,180 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:19,180 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 10:23:19,181 INFO L122 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 [2018-12-09 10:23:19,181 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 10:23:19,181 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 10:23:19,181 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 10:23:19,181 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 10:23:19,181 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 10:23:19,182 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 10:23:19,182 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 10:23:19,184 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 10:23:19,186 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-09 10:23:19,186 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-09 10:23:19,187 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 10:23:19,187 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-09 10:23:19,187 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 10:23:19,187 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-12-09 10:23:19,187 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-09 10:23:19,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:19,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:19,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:23:19,291 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 [2018-12-09 10:23:19,291 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-12-09 10:23:19,411 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. [2018-12-09 10:23:19,412 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 [2018-12-09 10:23:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-09 10:23:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-12-09 10:23:19,412 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2018-12-09 10:23:19,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:19,413 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 10:23:19,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:19,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:19,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:23:19,509 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 [2018-12-09 10:23:19,509 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-12-09 10:23:19,616 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. [2018-12-09 10:23:19,616 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 [2018-12-09 10:23:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-09 10:23:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-12-09 10:23:19,617 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2018-12-09 10:23:19,617 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:19,617 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-09 10:23:19,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:23:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:19,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:23:19,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:23:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:23:19,709 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 [2018-12-09 10:23:19,709 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-12-09 10:23:19,831 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. [2018-12-09 10:23:19,831 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 [2018-12-09 10:23:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-09 10:23:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2018-12-09 10:23:19,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 8 letters. [2018-12-09 10:23:19,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:19,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 39 letters. Loop has 8 letters. [2018-12-09 10:23:19,833 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:19,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 16 letters. [2018-12-09 10:23:19,833 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 10:23:19,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 210 transitions. [2018-12-09 10:23:19,834 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 10:23:19,834 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2018-12-09 10:23:19,835 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-09 10:23:19,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-09 10:23:19,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-09 10:23:19,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 10:23:19,835 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 10:23:19,835 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 10:23:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 10:23:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-09 10:23:19,835 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 9 states. [2018-12-09 10:23:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:23:19,835 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-09 10:23:19,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 10:23:19,835 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 10:23:19,836 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-09 10:23:19,836 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-09 10:23:19,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 10:23:19,836 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-09 10:23:19,836 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-09 10:23:19,836 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 10:23:19,836 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-09 10:23:19,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.12 10:23:19 BoogieIcfgContainer [2018-12-09 10:23:19,840 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-09 10:23:19,841 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 10:23:19,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 10:23:19,841 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 10:23:19,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:22:39" (3/4) ... [2018-12-09 10:23:19,843 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 10:23:19,843 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 10:23:19,844 INFO L168 Benchmark]: Toolchain (without parser) took 40910.79 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 300.4 MB). Free memory was 956.0 MB in the beginning and 862.3 MB in the end (delta: 93.7 MB). Peak memory consumption was 394.1 MB. Max. memory is 11.5 GB. [2018-12-09 10:23:19,845 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:23:19,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 110.66 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 10:23:19,845 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.64 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:23:19,845 INFO L168 Benchmark]: Boogie Preprocessor took 8.96 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:23:19,846 INFO L168 Benchmark]: RCFGBuilder took 134.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -146.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 10:23:19,846 INFO L168 Benchmark]: BuchiAutomizer took 40633.52 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 185.6 MB). Free memory was 1.1 GB in the beginning and 862.3 MB in the end (delta: 229.5 MB). Peak memory consumption was 415.1 MB. Max. memory is 11.5 GB. [2018-12-09 10:23:19,847 INFO L168 Benchmark]: Witness Printer took 2.69 ms. Allocated memory is still 1.3 GB. Free memory is still 862.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:23:19,848 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 110.66 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.64 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 8.96 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 134.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -146.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 40633.52 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 185.6 MB). Free memory was 1.1 GB in the beginning and 862.3 MB in the end (delta: 229.5 MB). Peak memory consumption was 415.1 MB. Max. memory is 11.5 GB. * Witness Printer took 2.69 ms. Allocated memory is still 1.3 GB. Free memory is still 862.3 MB. 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 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 40.6s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 37.4s. Construction of modules took 0.4s. Büchi inclusion checks took 2.5s. 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: 155 SDtfs, 246 SDslu, 186 SDs, 0 SdLazy, 832 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s 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 smp94 dnf100 smp100 tf110 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 36.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...