./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/McCarthy91-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/McCarthy91-2.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 3e87f89409ab3e763661ad617b0dadcb988e72d1 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 07:59:52,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 07:59:52,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 07:59:52,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 07:59:52,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 07:59:52,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 07:59:52,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 07:59:52,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 07:59:52,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 07:59:52,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 07:59:52,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 07:59:52,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 07:59:52,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 07:59:52,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 07:59:52,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 07:59:52,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 07:59:52,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 07:59:52,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 07:59:52,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 07:59:52,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 07:59:52,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 07:59:52,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 07:59:52,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 07:59:52,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 07:59:52,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 07:59:52,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 07:59:52,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 07:59:52,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 07:59:52,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 07:59:52,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 07:59:52,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 07:59:52,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 07:59:52,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 07:59:52,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 07:59:52,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 07:59:52,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 07:59:52,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 07:59:52,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 07:59:52,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 07:59:52,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 07:59:52,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 07:59:52,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 07:59:52,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 07:59:52,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 07:59:52,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 07:59:52,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 07:59:52,328 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 07:59:52,328 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 07:59:52,329 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 07:59:52,329 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 07:59:52,329 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 07:59:52,329 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 07:59:52,330 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 07:59:52,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 07:59:52,331 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 07:59:52,331 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 07:59:52,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 07:59:52,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 07:59:52,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 07:59:52,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 07:59:52,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 07:59:52,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 07:59:52,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 07:59:52,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 07:59:52,333 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 07:59:52,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 07:59:52,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 07:59:52,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 07:59:52,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 07:59:52,335 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 07:59:52,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 07:59:52,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 07:59:52,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 07:59:52,336 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 07:59:52,337 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 07:59:52,337 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 -> 3e87f89409ab3e763661ad617b0dadcb988e72d1 [2020-10-20 07:59:52,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 07:59:52,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 07:59:52,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 07:59:52,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 07:59:52,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 07:59:52,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/McCarthy91-2.c [2020-10-20 07:59:52,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a87c0c4/2fd9eb6280374c96a13473cef068fe49/FLAG3e73db530 [2020-10-20 07:59:53,253 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 07:59:53,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/McCarthy91-2.c [2020-10-20 07:59:53,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a87c0c4/2fd9eb6280374c96a13473cef068fe49/FLAG3e73db530 [2020-10-20 07:59:53,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a87c0c4/2fd9eb6280374c96a13473cef068fe49 [2020-10-20 07:59:53,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 07:59:53,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 07:59:53,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 07:59:53,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 07:59:53,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 07:59:53,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:53,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733023ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53, skipping insertion in model container [2020-10-20 07:59:53,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:53,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 07:59:53,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 07:59:53,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 07:59:53,947 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 07:59:53,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 07:59:53,979 INFO L208 MainTranslator]: Completed translation [2020-10-20 07:59:53,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53 WrapperNode [2020-10-20 07:59:53,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 07:59:53,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 07:59:53,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 07:59:53,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 07:59:53,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:53,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 07:59:54,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 07:59:54,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 07:59:54,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 07:59:54,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (1/1) ... [2020-10-20 07:59:54,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 07:59:54,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 07:59:54,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 07:59:54,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 07:59:54,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (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 [2020-10-20 07:59:54,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 07:59:54,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 07:59:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 07:59:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 07:59:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-10-20 07:59:54,114 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-10-20 07:59:54,354 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 07:59:54,354 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 07:59:54,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 07:59:54 BoogieIcfgContainer [2020-10-20 07:59:54,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 07:59:54,358 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 07:59:54,359 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 07:59:54,363 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 07:59:54,365 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 07:59:54,365 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 07:59:53" (1/3) ... [2020-10-20 07:59:54,367 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@71860674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 07:59:54, skipping insertion in model container [2020-10-20 07:59:54,367 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 07:59:54,368 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:59:53" (2/3) ... [2020-10-20 07:59:54,368 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@71860674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 07:59:54, skipping insertion in model container [2020-10-20 07:59:54,368 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 07:59:54,369 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 07:59:54" (3/3) ... [2020-10-20 07:59:54,375 INFO L373 chiAutomizerObserver]: Analyzing ICFG McCarthy91-2.c [2020-10-20 07:59:54,446 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 07:59:54,446 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 07:59:54,447 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 07:59:54,447 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 07:59:54,448 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 07:59:54,448 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 07:59:54,448 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 07:59:54,449 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 07:59:54,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-10-20 07:59:54,507 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 07:59:54,508 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:59:54,508 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:59:54,518 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 07:59:54,519 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:59:54,519 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 07:59:54,519 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-10-20 07:59:54,522 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 07:59:54,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:59:54,523 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:59:54,524 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 07:59:54,524 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:59:54,533 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 6#L28true call main_#t~ret10 := f91(main_~x~0);< 18#f91ENTRYtrue [2020-10-20 07:59:54,534 INFO L796 eck$LassoCheckResult]: Loop: 18#f91ENTRYtrue ~x := #in~x; 5#L18true assume !(~x > 100); 19#L21true call #t~ret7 := f91(11 + ~x);< 18#f91ENTRYtrue [2020-10-20 07:59:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 29879, now seen corresponding path program 1 times [2020-10-20 07:59:54,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:59:54,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203350309] [2020-10-20 07:59:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:59:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:54,669 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:54,713 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:54,760 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:59:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash 46807, now seen corresponding path program 1 times [2020-10-20 07:59:54,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:59:54,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8973798] [2020-10-20 07:59:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:59:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:54,788 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:54,794 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:54,802 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:59:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash 890142305, now seen corresponding path program 1 times [2020-10-20 07:59:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:59:54,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31376523] [2020-10-20 07:59:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:59:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:54,842 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:54,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:54,863 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:59:54,991 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:59:54,992 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:59:54,993 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:59:54,993 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:59:54,993 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:59:54,994 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:54,994 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:59:54,994 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:59:54,994 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration1_Loop [2020-10-20 07:59:54,995 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:59:54,995 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:59:55,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:55,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:55,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:55,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:55,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:55,175 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:59:55,176 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) [2020-10-20 07:59:55,197 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:55,198 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 [2020-10-20 07:59:55,210 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:59:55,210 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=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 [2020-10-20 07:59:55,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:55,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:59:55,250 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:59:55,250 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:55,276 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:55,276 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:59:55,280 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:59:55,280 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:55,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:55,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:59:55,318 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:59:55,318 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:55,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:55,342 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:55,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:59:55,378 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:59:56,360 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 07:59:56,363 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:59:56,363 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:59:56,364 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:59:56,364 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:59:56,364 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 07:59:56,364 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,364 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:59:56,364 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:59:56,364 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration1_Loop [2020-10-20 07:59:56,364 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:59:56,365 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:59:56,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:56,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:56,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:56,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:56,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:56,451 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:59:56,457 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:59:56,484 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 [2020-10-20 07:59:56,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:59:56,498 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:59:56,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:59:56,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:59:56,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:59:56,503 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:59:56,503 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,513 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,541 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 [2020-10-20 07:59:56,544 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:59:56,544 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:59:56,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:59:56,544 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:59:56,544 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:59:56,547 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:59:56,547 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:59:56,552 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,589 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 [2020-10-20 07:59:56,591 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:59:56,591 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:59:56,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:59:56,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:59:56,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:59:56,593 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:59:56,593 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:59:56,595 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,632 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 [2020-10-20 07:59:56,634 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:59:56,634 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:59:56,634 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:59:56,634 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:59:56,634 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:59:56,635 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:59:56,635 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:59:56,640 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,674 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 [2020-10-20 07:59:56,677 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:59:56,677 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:59:56,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:59:56,677 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:59:56,677 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:59:56,679 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:59:56,679 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:59:56,682 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 07:59:56,692 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 07:59:56,692 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:56,698 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 07:59:56,699 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 07:59:56,699 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 07:59:56,700 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -2*f91_#in~x + 211 Supporting invariants [] [2020-10-20 07:59:56,731 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 07:59:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:59:56,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:59:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:59:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:59:56,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 07:59:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:59:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:59:56,934 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 [2020-10-20 07:59:56,935 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2020-10-20 07:59:57,060 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 35 states and 43 transitions. Complement of second has 12 states. [2020-10-20 07:59:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:59:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 07:59:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-10-20 07:59:57,066 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2020-10-20 07:59:57,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:59:57,068 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2020-10-20 07:59:57,069 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:59:57,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-20 07:59:57,069 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:59:57,070 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 43 transitions. [2020-10-20 07:59:57,074 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 07:59:57,082 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2020-10-20 07:59:57,083 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-10-20 07:59:57,084 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-10-20 07:59:57,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2020-10-20 07:59:57,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:59:57,087 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-10-20 07:59:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2020-10-20 07:59:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-20 07:59:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 07:59:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-10-20 07:59:57,120 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-20 07:59:57,120 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-20 07:59:57,120 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 07:59:57,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2020-10-20 07:59:57,122 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 07:59:57,122 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:59:57,122 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:59:57,123 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 07:59:57,123 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-20 07:59:57,124 INFO L794 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 105#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 106#L28 call main_#t~ret10 := f91(main_~x~0);< 116#f91ENTRY ~x := #in~x; 111#L18 assume !(~x > 100); 109#L21 call #t~ret7 := f91(11 + ~x);< 119#f91ENTRY ~x := #in~x; 108#L18 assume ~x > 100;#res := ~x - 10; 110#f91FINAL assume true; 117#f91EXIT >#29#return; 114#L21-1 [2020-10-20 07:59:57,124 INFO L796 eck$LassoCheckResult]: Loop: 114#L21-1 call #t~ret8 := f91(#t~ret7);< 118#f91ENTRY ~x := #in~x; 121#L18 assume !(~x > 100); 113#L21 call #t~ret7 := f91(11 + ~x);< 118#f91ENTRY ~x := #in~x; 121#L18 assume ~x > 100;#res := ~x - 10; 115#f91FINAL assume true; 120#f91EXIT >#29#return; 114#L21-1 [2020-10-20 07:59:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:57,124 INFO L82 PathProgramCache]: Analyzing trace with hash -218206616, now seen corresponding path program 1 times [2020-10-20 07:59:57,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:59:57,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377734191] [2020-10-20 07:59:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:59:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:57,141 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:57,154 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:57,160 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:59:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1767505954, now seen corresponding path program 1 times [2020-10-20 07:59:57,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:59:57,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753055685] [2020-10-20 07:59:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:59:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:57,168 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:57,172 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:57,174 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:59:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:59:57,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1919740023, now seen corresponding path program 1 times [2020-10-20 07:59:57,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:59:57,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333974942] [2020-10-20 07:59:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:59:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:57,227 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:59:57,263 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:59:57,273 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:59:57,408 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:59:57,409 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:59:57,409 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:59:57,409 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:59:57,409 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:59:57,409 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:57,409 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:59:57,409 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:59:57,409 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration2_Loop [2020-10-20 07:59:57,410 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:59:57,410 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:59:57,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:57,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:57,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:59:57,488 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:59:57,488 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:59:57,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:57,500 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:59:57,504 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:59:57,505 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:59:57,558 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:59:57,558 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:59:57,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:59:57,637 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:09,690 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-10-20 08:00:09,695 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:09,695 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:09,695 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:09,695 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:09,695 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:09,695 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:09,695 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:09,696 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:09,696 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration2_Loop [2020-10-20 08:00:09,696 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:09,696 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:09,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:09,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:09,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:09,763 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:09,763 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:09,778 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 [2020-10-20 08:00:09,780 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:09,780 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:09,781 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:09,781 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:09,781 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:09,782 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:09,782 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:09,784 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:09,841 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 [2020-10-20 08:00:09,843 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:09,844 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:09,844 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:09,844 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:09,844 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:09,847 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:09,847 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:09,852 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:09,857 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:09,857 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:09,889 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:09,889 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:09,889 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:09,889 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#t~ret7) = -2*f91_#t~ret7 + 201 Supporting invariants [] Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:09,925 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:00:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:10,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 08:00:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:10,224 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 [2020-10-20 08:00:10,224 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 9 states. [2020-10-20 08:00:10,503 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 51 states and 73 transitions. Complement of second has 32 states. [2020-10-20 08:00:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2020-10-20 08:00:10,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2020-10-20 08:00:10,508 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:10,508 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2020-10-20 08:00:10,508 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:10,508 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2020-10-20 08:00:10,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:10,509 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2020-10-20 08:00:10,515 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-10-20 08:00:10,519 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2020-10-20 08:00:10,520 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-10-20 08:00:10,520 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2020-10-20 08:00:10,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2020-10-20 08:00:10,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:10,521 INFO L691 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2020-10-20 08:00:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2020-10-20 08:00:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-20 08:00:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 08:00:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2020-10-20 08:00:10,530 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-10-20 08:00:10,530 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-10-20 08:00:10,530 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:00:10,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2020-10-20 08:00:10,532 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-10-20 08:00:10,532 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:10,532 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:10,533 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:10,533 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 08:00:10,534 INFO L794 eck$LassoCheckResult]: Stem: 293#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 291#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 292#L28 call main_#t~ret10 := f91(main_~x~0);< 298#f91ENTRY ~x := #in~x; 296#L18 assume !(~x > 100); 297#L21 call #t~ret7 := f91(11 + ~x);< 316#f91ENTRY ~x := #in~x; 317#L18 assume ~x > 100;#res := ~x - 10; 308#f91FINAL assume true; 309#f91EXIT >#29#return; 301#L21-1 call #t~ret8 := f91(#t~ret7);< 314#f91ENTRY ~x := #in~x; 326#L18 assume !(~x > 100); 295#L21 [2020-10-20 08:00:10,534 INFO L796 eck$LassoCheckResult]: Loop: 295#L21 call #t~ret7 := f91(11 + ~x);< 315#f91ENTRY ~x := #in~x; 294#L18 assume !(~x > 100); 295#L21 [2020-10-20 08:00:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1987218266, now seen corresponding path program 2 times [2020-10-20 08:00:10,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:10,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591634475] [2020-10-20 08:00:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:10,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:10,572 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:10,579 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 57247, now seen corresponding path program 2 times [2020-10-20 08:00:10,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:10,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74074645] [2020-10-20 08:00:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:10,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:10,597 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:10,599 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash -609818202, now seen corresponding path program 3 times [2020-10-20 08:00:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:10,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762524734] [2020-10-20 08:00:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:10,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 08:00:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 08:00:10,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762524734] [2020-10-20 08:00:10,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:10,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 08:00:10,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383305585] [2020-10-20 08:00:10,752 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:10,752 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:10,752 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:10,752 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:10,753 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:10,753 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:10,753 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:10,753 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:10,753 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration3_Loop [2020-10-20 08:00:10,753 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:10,753 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:10,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:10,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:10,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:10,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:10,805 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:10,805 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:10,810 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:10,810 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:10,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:10,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 08:00:10,850 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:10,850 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:10,854 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:10,855 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:10,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:10,881 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:10,884 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:10,885 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:10,915 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:10,915 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:10,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:10,955 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:23,041 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-10-20 08:00:23,045 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:23,045 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:23,045 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:23,045 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:23,045 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:23,045 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:23,046 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:23,046 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:23,046 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration3_Loop [2020-10-20 08:00:23,046 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:23,046 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:23,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:23,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:23,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:23,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:23,110 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:23,110 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:23,128 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 [2020-10-20 08:00:23,130 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:23,130 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:23,131 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:23,131 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:23,131 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:23,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:23,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:23,150 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:23,191 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 [2020-10-20 08:00:23,193 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:23,193 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:23,193 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:23,193 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:23,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:23,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:23,195 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:23,196 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:23,220 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 [2020-10-20 08:00:23,221 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:23,221 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:23,221 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:23,221 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:23,221 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:23,222 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:23,222 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:23,224 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:23,251 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 [2020-10-20 08:00:23,253 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:23,253 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:23,253 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:23,254 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:23,254 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:23,255 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:23,255 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:23,258 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:23,276 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:23,276 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:23,280 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:23,280 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:23,281 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:23,281 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_~x) = -2*f91_~x + 189 Supporting invariants [] [2020-10-20 08:00:23,303 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:23,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:23,417 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 [2020-10-20 08:00:23,418 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-10-20 08:00:23,538 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2020-10-20 08:00:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2020-10-20 08:00:23,540 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2020-10-20 08:00:23,541 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:23,541 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:23,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:23,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:23,675 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 [2020-10-20 08:00:23,675 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-10-20 08:00:23,756 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2020-10-20 08:00:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2020-10-20 08:00:23,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2020-10-20 08:00:23,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:23,768 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:23,883 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 [2020-10-20 08:00:23,883 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-10-20 08:00:23,994 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 71 states and 100 transitions. Complement of second has 16 states. [2020-10-20 08:00:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2020-10-20 08:00:23,997 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2020-10-20 08:00:23,998 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:23,998 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2020-10-20 08:00:23,998 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:23,998 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2020-10-20 08:00:23,999 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:23,999 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2020-10-20 08:00:24,006 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-20 08:00:24,012 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2020-10-20 08:00:24,013 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-10-20 08:00:24,013 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2020-10-20 08:00:24,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2020-10-20 08:00:24,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:24,013 INFO L691 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2020-10-20 08:00:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2020-10-20 08:00:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-20 08:00:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 08:00:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-10-20 08:00:24,024 INFO L714 BuchiCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-10-20 08:00:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:24,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:00:24,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:00:24,028 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 8 states. [2020-10-20 08:00:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:24,177 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-10-20 08:00:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:24,178 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2020-10-20 08:00:24,181 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-10-20 08:00:24,183 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2020-10-20 08:00:24,183 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2020-10-20 08:00:24,184 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-10-20 08:00:24,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2020-10-20 08:00:24,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:24,185 INFO L691 BuchiCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-20 08:00:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2020-10-20 08:00:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-20 08:00:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 08:00:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-10-20 08:00:24,192 INFO L714 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-10-20 08:00:24,192 INFO L594 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-10-20 08:00:24,192 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:00:24,192 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2020-10-20 08:00:24,194 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-10-20 08:00:24,194 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:24,194 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:24,196 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 08:00:24,196 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2020-10-20 08:00:24,196 INFO L794 eck$LassoCheckResult]: Stem: 839#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 837#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 838#L28 call main_#t~ret10 := f91(main_~x~0);< 851#f91ENTRY ~x := #in~x; 883#L18 assume !(~x > 100); 866#L21 call #t~ret7 := f91(11 + ~x);< 867#f91ENTRY ~x := #in~x; 876#L18 assume !(~x > 100); 872#L21 call #t~ret7 := f91(11 + ~x);< 874#f91ENTRY ~x := #in~x; 877#L18 assume ~x > 100;#res := ~x - 10; 875#f91FINAL assume true; 873#f91EXIT >#29#return; 849#L21-1 call #t~ret8 := f91(#t~ret7);< 861#f91ENTRY ~x := #in~x; 891#L18 assume ~x > 100;#res := ~x - 10; 890#f91FINAL assume true; 887#f91EXIT >#31#return; 868#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 885#f91FINAL assume true; 884#f91EXIT >#29#return; 853#L21-1 call #t~ret8 := f91(#t~ret7);< 882#f91ENTRY [2020-10-20 08:00:24,196 INFO L796 eck$LassoCheckResult]: Loop: 882#f91ENTRY ~x := #in~x; 879#L18 assume !(~x > 100); 841#L21 call #t~ret7 := f91(11 + ~x);< 865#f91ENTRY ~x := #in~x; 844#L18 assume !(~x > 100); 842#L21 call #t~ret7 := f91(11 + ~x);< 878#f91ENTRY ~x := #in~x; 840#L18 assume ~x > 100;#res := ~x - 10; 843#f91FINAL assume true; 893#f91EXIT >#29#return; 846#L21-1 call #t~ret8 := f91(#t~ret7);< 859#f91ENTRY ~x := #in~x; 880#L18 assume ~x > 100;#res := ~x - 10; 881#f91FINAL assume true; 886#f91EXIT >#31#return; 868#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 885#f91FINAL assume true; 884#f91EXIT >#29#return; 854#L21-1 call #t~ret8 := f91(#t~ret7);< 882#f91ENTRY [2020-10-20 08:00:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash -834951989, now seen corresponding path program 1 times [2020-10-20 08:00:24,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:24,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415184927] [2020-10-20 08:00:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:24,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:24,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:24,229 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash -871747263, now seen corresponding path program 1 times [2020-10-20 08:00:24,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:24,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579839605] [2020-10-20 08:00:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:24,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:24,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:24,247 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash 418853943, now seen corresponding path program 2 times [2020-10-20 08:00:24,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:24,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953608866] [2020-10-20 08:00:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 08:00:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 08:00:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 08:00:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-20 08:00:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 08:00:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 08:00:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-20 08:00:24,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953608866] [2020-10-20 08:00:24,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364664628] [2020-10-20 08:00:24,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:24,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:24,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-20 08:00:24,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:24,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 08:00:24,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936224886] [2020-10-20 08:00:24,833 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:24,833 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:24,833 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:24,833 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:24,833 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:24,834 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:24,834 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:24,834 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:24,834 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration4_Loop [2020-10-20 08:00:24,834 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:24,835 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:24,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:24,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:24,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:24,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:24,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:24,896 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:24,896 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:24,899 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:24,899 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:24,906 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:24,907 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:24,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:24,941 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:24,944 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:24,944 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:24,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:24,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:24,972 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:24,973 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:25,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:25,010 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,037 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:25,037 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:25,699 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:25,703 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:25,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:25,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:25,703 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:25,704 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:25,704 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,704 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:25,704 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:25,704 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration4_Loop [2020-10-20 08:00:25,704 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:25,704 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:25,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:25,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:25,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:25,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:25,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:25,767 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:25,767 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:25,777 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 [2020-10-20 08:00:25,779 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:25,779 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:25,780 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:25,780 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:25,780 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:25,781 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:25,781 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,783 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,805 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 [2020-10-20 08:00:25,806 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:25,807 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:25,807 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:25,807 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:25,807 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:25,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:25,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:25,809 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,832 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 [2020-10-20 08:00:25,834 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:25,834 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:25,834 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:25,834 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:25,834 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:25,834 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:25,835 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:25,836 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,860 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 [2020-10-20 08:00:25,862 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:25,862 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:25,862 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:25,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:25,862 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:25,864 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:25,864 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:25,867 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:25,873 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:25,873 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:25,876 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:25,876 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:25,876 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:25,877 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -1*f91_#in~x + 90 Supporting invariants [] [2020-10-20 08:00:25,899 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:25,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:26,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-20 08:00:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-20 08:00:26,275 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 [2020-10-20 08:00:26,275 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2020-10-20 08:00:26,831 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2020-10-20 08:00:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 08:00:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2020-10-20 08:00:26,835 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2020-10-20 08:00:26,836 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:26,836 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:26,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:26,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:26,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:27,130 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2020-10-20 08:00:27,131 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 11 states. [2020-10-20 08:00:27,576 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 11 states. Result 125 states and 150 transitions. Complement of second has 37 states. [2020-10-20 08:00:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 08:00:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 34 transitions. [2020-10-20 08:00:27,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2020-10-20 08:00:27,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:27,579 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:27,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:27,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:27,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:27,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:27,841 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 9 loop predicates [2020-10-20 08:00:27,842 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 11 states. [2020-10-20 08:00:28,683 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 11 states. Result 325 states and 417 transitions. Complement of second has 123 states. [2020-10-20 08:00:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 2 stem states 15 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 08:00:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 49 transitions. [2020-10-20 08:00:28,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2020-10-20 08:00:28,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:28,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2020-10-20 08:00:28,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:28,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2020-10-20 08:00:28,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:28,697 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 325 states and 417 transitions. [2020-10-20 08:00:28,716 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 25 [2020-10-20 08:00:28,723 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 325 states to 169 states and 230 transitions. [2020-10-20 08:00:28,725 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2020-10-20 08:00:28,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2020-10-20 08:00:28,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 230 transitions. [2020-10-20 08:00:28,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:28,727 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 230 transitions. [2020-10-20 08:00:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 230 transitions. [2020-10-20 08:00:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-10-20 08:00:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-20 08:00:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-10-20 08:00:28,747 INFO L714 BuchiCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-10-20 08:00:28,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 08:00:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 08:00:28,748 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 10 states. [2020-10-20 08:00:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:29,025 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2020-10-20 08:00:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 08:00:29,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138 states and 163 transitions. [2020-10-20 08:00:29,030 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 08:00:29,032 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138 states to 101 states and 121 transitions. [2020-10-20 08:00:29,032 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2020-10-20 08:00:29,033 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2020-10-20 08:00:29,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 121 transitions. [2020-10-20 08:00:29,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:29,034 INFO L691 BuchiCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-10-20 08:00:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states and 121 transitions. [2020-10-20 08:00:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-20 08:00:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-20 08:00:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-10-20 08:00:29,041 INFO L714 BuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-10-20 08:00:29,042 INFO L594 BuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-10-20 08:00:29,042 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:00:29,042 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 117 transitions. [2020-10-20 08:00:29,043 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 08:00:29,043 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:29,044 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:29,045 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-10-20 08:00:29,045 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:29,046 INFO L794 eck$LassoCheckResult]: Stem: 2632#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2630#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 2631#L28 call main_#t~ret10 := f91(main_~x~0);< 2644#f91ENTRY ~x := #in~x; 2637#L18 assume !(~x > 100); 2638#L21 call #t~ret7 := f91(11 + ~x);< 2656#f91ENTRY ~x := #in~x; 2658#L18 assume !(~x > 100); 2657#L21 call #t~ret7 := f91(11 + ~x);< 2686#f91ENTRY ~x := #in~x; 2688#L18 assume ~x > 100;#res := ~x - 10; 2687#f91FINAL assume true; 2685#f91EXIT >#29#return; 2681#L21-1 call #t~ret8 := f91(#t~ret7);< 2684#f91ENTRY ~x := #in~x; 2697#L18 assume ~x > 100;#res := ~x - 10; 2689#f91FINAL assume true; 2680#f91EXIT >#31#return; 2679#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 2677#f91FINAL assume true; 2676#f91EXIT >#29#return; 2670#L21-1 call #t~ret8 := f91(#t~ret7);< 2675#f91ENTRY ~x := #in~x; 2673#L18 assume !(~x > 100); 2651#L21 call #t~ret7 := f91(11 + ~x);< 2672#f91ENTRY ~x := #in~x; 2696#L18 assume ~x > 100;#res := ~x - 10; 2695#f91FINAL assume true; 2694#f91EXIT >#29#return; 2692#L21-1 call #t~ret8 := f91(#t~ret7);< 2693#f91ENTRY ~x := #in~x; 2708#L18 assume !(~x > 100); 2709#L21 call #t~ret7 := f91(11 + ~x);< 2660#f91ENTRY ~x := #in~x; 2726#L18 assume ~x > 100;#res := ~x - 10; 2724#f91FINAL assume true; 2717#f91EXIT >#29#return; 2640#L21-1 call #t~ret8 := f91(#t~ret7);< 2716#f91ENTRY [2020-10-20 08:00:29,046 INFO L796 eck$LassoCheckResult]: Loop: 2716#f91ENTRY ~x := #in~x; 2720#L18 assume !(~x > 100); 2718#L21 call #t~ret7 := f91(11 + ~x);< 2660#f91ENTRY ~x := #in~x; 2726#L18 assume ~x > 100;#res := ~x - 10; 2724#f91FINAL assume true; 2717#f91EXIT >#29#return; 2642#L21-1 call #t~ret8 := f91(#t~ret7);< 2716#f91ENTRY [2020-10-20 08:00:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1139827145, now seen corresponding path program 3 times [2020-10-20 08:00:29,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:29,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364467999] [2020-10-20 08:00:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:29,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:29,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:29,076 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 31195136, now seen corresponding path program 2 times [2020-10-20 08:00:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324722165] [2020-10-20 08:00:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:29,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:29,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:29,084 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:29,085 INFO L82 PathProgramCache]: Analyzing trace with hash 424810952, now seen corresponding path program 4 times [2020-10-20 08:00:29,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:29,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740360161] [2020-10-20 08:00:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:29,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:29,118 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:29,126 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:29,216 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:29,216 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:29,217 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:29,217 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:29,217 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:29,217 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,217 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:29,217 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:29,217 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration5_Loop [2020-10-20 08:00:29,217 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:29,218 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:29,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,272 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:29,272 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:29,286 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:29,286 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,290 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:29,291 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:29,332 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:29,332 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,370 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:29,371 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:29,375 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:29,397 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:29,397 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:29,397 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:29,398 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:29,398 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:29,398 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,398 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:29,398 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:29,398 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration5_Loop [2020-10-20 08:00:29,398 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:29,398 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:29,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:29,443 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:29,444 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:29,456 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,458 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:29,459 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:29,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:29,459 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:29,459 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:29,460 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:29,460 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:29,463 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 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,486 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 [2020-10-20 08:00:29,488 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:29,488 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:29,488 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:29,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:29,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:29,489 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:29,489 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:29,492 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:29,495 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:29,495 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:29,498 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:29,498 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:29,499 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:29,499 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -2*f91_#in~x + 201 Supporting invariants [] [2020-10-20 08:00:29,521 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:29,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:29,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 08:00:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:29,792 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 [2020-10-20 08:00:29,792 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-10-20 08:00:29,918 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 107 states and 127 transitions. Complement of second has 12 states. [2020-10-20 08:00:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2020-10-20 08:00:29,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 38 letters. Loop has 8 letters. [2020-10-20 08:00:29,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:29,923 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:30,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:30,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 08:00:30,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:30,171 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 [2020-10-20 08:00:30,171 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-10-20 08:00:30,508 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 125 states and 146 transitions. Complement of second has 24 states. [2020-10-20 08:00:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2020-10-20 08:00:30,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 38 letters. Loop has 8 letters. [2020-10-20 08:00:30,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:30,515 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:30,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:30,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 08:00:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:30,750 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 [2020-10-20 08:00:30,750 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-10-20 08:00:30,889 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 147 states and 167 transitions. Complement of second has 13 states. [2020-10-20 08:00:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-10-20 08:00:30,895 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 38 letters. Loop has 8 letters. [2020-10-20 08:00:30,895 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:30,895 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:30,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:30,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 08:00:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:31,118 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-20 08:00:31,118 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-10-20 08:00:31,587 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 182 states and 209 transitions. Complement of second has 48 states. [2020-10-20 08:00:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 27 transitions. [2020-10-20 08:00:31,589 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 8 letters. [2020-10-20 08:00:31,590 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:31,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 46 letters. Loop has 8 letters. [2020-10-20 08:00:31,591 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:31,591 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 16 letters. [2020-10-20 08:00:31,592 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:31,592 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 209 transitions. [2020-10-20 08:00:31,595 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:00:31,596 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 0 states and 0 transitions. [2020-10-20 08:00:31,596 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:00:31,596 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:00:31,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:00:31,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:00:31,597 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:00:31,597 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:00:31,597 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:00:31,597 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:00:31,598 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:00:31,598 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:00:31,598 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:00:31,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:00:31 BoogieIcfgContainer [2020-10-20 08:00:31,607 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:00:31,608 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:00:31,608 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:00:31,608 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:00:31,609 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 07:59:54" (3/4) ... [2020-10-20 08:00:31,613 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:00:31,613 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:00:31,617 INFO L168 Benchmark]: Toolchain (without parser) took 37963.46 ms. Allocated memory was 36.2 MB in the beginning and 91.2 MB in the end (delta: 55.1 MB). Free memory was 16.6 MB in the beginning and 25.7 MB in the end (delta: -9.2 MB). Peak memory consumption was 45.9 MB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,617 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 34.1 MB. Free memory was 9.8 MB in the beginning and 9.8 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.77 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 15.7 MB in the beginning and 26.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.73 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,620 INFO L168 Benchmark]: Boogie Preprocessor took 21.03 ms. Allocated memory is still 44.6 MB. Free memory was 25.0 MB in the beginning and 23.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,621 INFO L168 Benchmark]: RCFGBuilder took 316.86 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 23.8 MB in the beginning and 24.6 MB in the end (delta: -703.4 kB). Peak memory consumption was 12.5 MB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,622 INFO L168 Benchmark]: BuchiAutomizer took 37249.18 ms. Allocated memory was 46.7 MB in the beginning and 91.2 MB in the end (delta: 44.6 MB). Free memory was 24.3 MB in the beginning and 25.7 MB in the end (delta: -1.4 MB). Peak memory consumption was 43.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:00:31,623 INFO L168 Benchmark]: Witness Printer took 5.63 ms. Allocated memory is still 91.2 MB. Free memory is still 25.7 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:00:31,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 34.1 MB. Free memory was 9.8 MB in the beginning and 9.8 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 318.77 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 15.7 MB in the beginning and 26.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 38.73 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 21.03 ms. Allocated memory is still 44.6 MB. Free memory was 25.0 MB in the beginning and 23.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 316.86 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 23.8 MB in the beginning and 24.6 MB in the end (delta: -703.4 kB). Peak memory consumption was 12.5 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 37249.18 ms. Allocated memory was 46.7 MB in the beginning and 91.2 MB in the end (delta: 44.6 MB). Free memory was 24.3 MB in the beginning and 25.7 MB in the end (delta: -1.4 MB). Peak memory consumption was 43.1 MB. Max. memory is 14.3 GB. * Witness Printer took 5.63 ms. Allocated memory is still 91.2 MB. Free memory is still 25.7 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(x) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-f91(x+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * x + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(x) + 90 and consists of 18 locations. One nondeterministic module has affine ranking function -2 * \old(x) + 201 and consists of 11 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 37.1s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 29.9s. Construction of modules took 0.9s. Büchi inclusion checks took 5.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 48 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 97 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/24 HoareTripleCheckerStatistics: 181 SDtfs, 294 SDslu, 183 SDs, 0 SdLazy, 801 SolverSat, 238 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf110 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 54ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 12 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 26.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...