./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/afterrec-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/afterrec-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5ef17aa1c9651b69615437dbc30c973e58ddb6de .................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 20:07:29,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 20:07:29,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 20:07:29,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 20:07:29,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 20:07:29,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 20:07:29,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 20:07:29,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 20:07:29,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 20:07:29,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 20:07:29,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 20:07:29,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 20:07:29,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 20:07:29,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 20:07:29,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 20:07:29,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 20:07:29,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 20:07:29,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 20:07:29,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 20:07:29,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 20:07:29,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 20:07:29,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 20:07:29,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 20:07:29,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 20:07:29,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 20:07:29,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 20:07:29,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 20:07:29,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 20:07:29,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 20:07:29,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 20:07:29,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 20:07:29,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 20:07:29,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 20:07:29,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 20:07:29,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 20:07:29,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 20:07:29,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 20:07:29,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 20:07:29,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 20:07:29,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 20:07:29,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 20:07:29,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 20:07:29,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 20:07:29,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 20:07:29,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 20:07:29,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 20:07:29,352 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 20:07:29,352 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 20:07:29,352 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 20:07:29,352 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 20:07:29,353 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 20:07:29,353 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 20:07:29,354 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 20:07:29,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 20:07:29,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 20:07:29,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 20:07:29,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 20:07:29,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 20:07:29,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 20:07:29,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 20:07:29,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 20:07:29,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 20:07:29,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 20:07:29,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 20:07:29,358 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 20:07:29,358 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 20:07:29,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 20:07:29,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 20:07:29,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 20:07:29,360 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 20:07:29,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 20:07:29,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 20:07:29,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 20:07:29,361 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 20:07:29,363 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 20:07:29,363 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ef17aa1c9651b69615437dbc30c973e58ddb6de [2020-10-19 20:07:29,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 20:07:29,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 20:07:29,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 20:07:29,688 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 20:07:29,689 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 20:07:29,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec-2.c [2020-10-19 20:07:29,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2b928e9/9a6ea35ff6be4e4cbc66845d7ffdca63/FLAGad5519d3a [2020-10-19 20:07:30,219 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 20:07:30,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-2.c [2020-10-19 20:07:30,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2b928e9/9a6ea35ff6be4e4cbc66845d7ffdca63/FLAGad5519d3a [2020-10-19 20:07:30,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2b928e9/9a6ea35ff6be4e4cbc66845d7ffdca63 [2020-10-19 20:07:30,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 20:07:30,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 20:07:30,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 20:07:30,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 20:07:30,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 20:07:30,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9687c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30, skipping insertion in model container [2020-10-19 20:07:30,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 20:07:30,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 20:07:30,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:07:30,829 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 20:07:30,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:07:30,862 INFO L208 MainTranslator]: Completed translation [2020-10-19 20:07:30,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30 WrapperNode [2020-10-19 20:07:30,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 20:07:30,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 20:07:30,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 20:07:30,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 20:07:30,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 20:07:30,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 20:07:30,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 20:07:30,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 20:07:30,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... [2020-10-19 20:07:30,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 20:07:30,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 20:07:30,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 20:07:30,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 20:07:30,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-19 20:07:31,020 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-19 20:07:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 20:07:31,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 20:07:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 20:07:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 20:07:31,197 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 20:07:31,197 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 20:07:31,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:31 BoogieIcfgContainer [2020-10-19 20:07:31,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 20:07:31,199 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 20:07:31,199 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 20:07:31,202 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 20:07:31,203 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:31,203 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 08:07:30" (1/3) ... [2020-10-19 20:07:31,204 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4926e72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:07:31, skipping insertion in model container [2020-10-19 20:07:31,205 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:31,205 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:30" (2/3) ... [2020-10-19 20:07:31,205 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4926e72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:07:31, skipping insertion in model container [2020-10-19 20:07:31,205 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:31,205 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:31" (3/3) ... [2020-10-19 20:07:31,207 INFO L373 chiAutomizerObserver]: Analyzing ICFG afterrec-2.c [2020-10-19 20:07:31,245 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 20:07:31,245 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 20:07:31,245 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 20:07:31,246 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 20:07:31,246 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 20:07:31,246 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 20:07:31,246 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 20:07:31,246 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 20:07:31,257 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-10-19 20:07:31,279 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 20:07:31,279 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:31,280 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:31,286 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:07:31,286 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 20:07:31,286 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 20:07:31,286 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2020-10-19 20:07:31,288 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 20:07:31,288 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:31,288 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:31,288 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:07:31,288 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 20:07:31,295 INFO L794 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(13);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 8#L-1true havoc main_#res; 14#L13true call f(2);< 10#fENTRYtrue [2020-10-19 20:07:31,295 INFO L796 eck$LassoCheckResult]: Loop: 10#fENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 3);#t~post7 := ~n;~n := #t~post7 - 1;havoc #t~post7; 4#L8true call f(~n);< 10#fENTRYtrue [2020-10-19 20:07:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 40785, now seen corresponding path program 1 times [2020-10-19 20:07:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:31,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417850878] [2020-10-19 20:07:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:31,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:31,425 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:31,445 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 29933, now seen corresponding path program 1 times [2020-10-19 20:07:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:31,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406850218] [2020-10-19 20:07:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:31,455 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:31,459 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:31,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:31,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1215026077, now seen corresponding path program 1 times [2020-10-19 20:07:31,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:31,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588367632] [2020-10-19 20:07:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:31,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588367632] [2020-10-19 20:07:31,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:07:31,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 20:07:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478977897] [2020-10-19 20:07:31,654 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:31,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:31,655 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:31,655 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:31,655 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:31,655 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:31,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:31,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:31,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: afterrec-2.c_Iteration1_Loop [2020-10-19 20:07:31,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:31,656 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:31,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:31,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:31,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:31,749 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:31,750 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:31,764 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:31,764 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:31,788 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:31,788 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#t~post7=0} Honda state: {f_#t~post7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:31,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:31,829 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:31,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:31,857 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:31,923 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:31,925 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:31,926 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:31,926 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:31,926 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:31,926 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:31,926 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:31,926 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:31,927 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:31,927 INFO L133 ssoRankerPreferences]: Filename of dumped script: afterrec-2.c_Iteration1_Loop [2020-10-19 20:07:31,927 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:31,927 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:31,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:31,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:31,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:31,983 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:31,989 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:32,000 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:32,003 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:32,003 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:32,004 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:32,004 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:32,004 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:32,007 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:32,007 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:32,010 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:32,048 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:07:32,050 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:32,050 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:32,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:32,051 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:32,051 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:32,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:32,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:32,055 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:32,096 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:32,098 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:32,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:32,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:32,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:32,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:32,100 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:32,101 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:32,104 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:32,112 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:32,112 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:32,119 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:32,119 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:32,119 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:32,120 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f_#in~n) = 1*f_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:32,157 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 20:07:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 20:07:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:07:32,296 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 [2020-10-19 20:07:32,297 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2020-10-19 20:07:32,412 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 39 states and 41 transitions. Complement of second has 19 states. [2020-10-19 20:07:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:07:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 20:07:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2020-10-19 20:07:32,419 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 3 letters. Loop has 3 letters. [2020-10-19 20:07:32,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:32,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 6 letters. Loop has 3 letters. [2020-10-19 20:07:32,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:32,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-19 20:07:32,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:32,423 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 41 transitions. [2020-10-19 20:07:32,427 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:07:32,431 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 0 states and 0 transitions. [2020-10-19 20:07:32,432 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:07:32,432 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:07:32,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:07:32,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:07:32,433 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:32,434 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:32,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:32,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 20:07:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 20:07:32,438 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2020-10-19 20:07:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:32,441 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-19 20:07:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 20:07:32,442 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-19 20:07:32,443 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:07:32,443 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 20:07:32,443 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:07:32,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:07:32,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:07:32,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:07:32,444 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:32,444 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:32,444 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:07:32,445 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 20:07:32,445 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 20:07:32,445 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:07:32,445 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 20:07:32,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 08:07:32 BoogieIcfgContainer [2020-10-19 20:07:32,452 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 20:07:32,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 20:07:32,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 20:07:32,453 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 20:07:32,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:31" (3/4) ... [2020-10-19 20:07:32,457 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 20:07:32,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 20:07:32,460 INFO L168 Benchmark]: Toolchain (without parser) took 1867.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 955.9 MB in the beginning and 1.0 GB in the end (delta: -45.1 MB). Peak memory consumption was 83.9 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:32,461 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:07:32,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.32 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 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. [2020-10-19 20:07:32,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -179.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:32,464 INFO L168 Benchmark]: Boogie Preprocessor took 15.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:07:32,465 INFO L168 Benchmark]: RCFGBuilder took 234.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:32,466 INFO L168 Benchmark]: BuchiAutomizer took 1253.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.5 MB). Peak memory consumption was 106.5 MB. Max. memory is 11.5 GB. [2020-10-19 20:07:32,466 INFO L168 Benchmark]: Witness Printer took 4.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:07:32,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 264.32 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 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 84.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -179.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 234.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1253.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.5 MB). Peak memory consumption was 106.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 6 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.2s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 0 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 5 SDtfs, 7 SDslu, 2 SDs, 0 SdLazy, 16 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...