./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/a.01.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/termination-restricted-15/a.01.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 403dc91589da6bf860a5e1f8b16384fde1e35c86 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 06:36:13,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:36:13,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:36:13,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:36:13,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:36:13,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:36:13,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:36:13,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:36:13,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:36:13,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:36:13,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:36:13,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:36:13,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:36:13,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:36:13,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:36:13,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:36:13,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:36:13,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:36:13,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:36:13,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:36:13,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:36:13,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:36:13,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:36:13,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:36:13,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:36:13,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:36:13,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:36:13,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:36:13,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:36:13,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:36:13,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:36:13,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:36:13,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:36:13,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:36:13,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:36:13,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:36:13,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:36:13,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:36:13,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:36:13,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:36:13,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:36:13,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:36:13,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:36:13,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:36:13,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:36:13,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:36:13,371 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:36:13,371 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:36:13,372 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:36:13,372 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:36:13,372 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:36:13,372 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:36:13,373 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:36:13,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:36:13,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:36:13,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:36:13,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:36:13,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:36:13,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:36:13,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:36:13,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:36:13,376 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:36:13,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:36:13,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:36:13,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:36:13,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:36:13,377 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:36:13,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:36:13,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:36:13,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:36:13,378 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:36:13,379 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:36:13,380 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 403dc91589da6bf860a5e1f8b16384fde1e35c86 [2020-10-20 06:36:13,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:36:13,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:36:13,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:36:13,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:36:13,618 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:36:13,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/a.01.c [2020-10-20 06:36:13,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab0398502/5c964d5d0b8f4745a04b4bfcdd2a7d3c/FLAG94d258361 [2020-10-20 06:36:14,168 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:36:14,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/a.01.c [2020-10-20 06:36:14,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab0398502/5c964d5d0b8f4745a04b4bfcdd2a7d3c/FLAG94d258361 [2020-10-20 06:36:14,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab0398502/5c964d5d0b8f4745a04b4bfcdd2a7d3c [2020-10-20 06:36:14,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:36:14,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:36:14,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:36:14,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:36:14,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:36:14,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ae4007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14, skipping insertion in model container [2020-10-20 06:36:14,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:36:14,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:36:14,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:36:14,852 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:36:14,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:36:14,877 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:36:14,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14 WrapperNode [2020-10-20 06:36:14,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:36:14,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:36:14,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:36:14,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:36:14,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:36:14,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:36:14,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:36:14,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:36:14,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (1/1) ... [2020-10-20 06:36:14,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:36:14,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:36:14,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:36:14,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:36:14,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (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 06:36:14,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:36:14,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:36:15,135 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:36:15,136 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 06:36:15,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:36:15 BoogieIcfgContainer [2020-10-20 06:36:15,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:36:15,138 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:36:15,138 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:36:15,141 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:36:15,142 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:36:15,142 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:36:14" (1/3) ... [2020-10-20 06:36:15,143 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@367c913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:36:15, skipping insertion in model container [2020-10-20 06:36:15,143 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:36:15,144 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:14" (2/3) ... [2020-10-20 06:36:15,144 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@367c913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:36:15, skipping insertion in model container [2020-10-20 06:36:15,144 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:36:15,144 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:36:15" (3/3) ... [2020-10-20 06:36:15,146 INFO L373 chiAutomizerObserver]: Analyzing ICFG a.01.c [2020-10-20 06:36:15,212 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:36:15,212 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:36:15,212 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:36:15,213 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:36:15,213 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:36:15,213 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:36:15,213 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:36:15,214 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:36:15,238 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-20 06:36:15,273 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:15,274 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:15,274 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:15,281 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:36:15,282 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:36:15,282 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:36:15,282 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-20 06:36:15,283 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:15,284 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:15,284 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:15,284 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:36:15,284 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:36:15,294 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 10#L11-2true [2020-10-20 06:36:15,295 INFO L796 eck$LassoCheckResult]: Loop: 10#L11-2true assume !!(main_~x~0 > 0);main_~y~0 := 0; 5#L13-2true assume !(main_~y~0 < main_~x~0); 3#L13-3true main_~x~0 := main_~x~0 - 1; 10#L11-2true [2020-10-20 06:36:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-20 06:36:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:15,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134446371] [2020-10-20 06:36:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,432 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-10-20 06:36:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:15,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773776228] [2020-10-20 06:36:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:15,504 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 06:36:15,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773776228] [2020-10-20 06:36:15,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:36:15,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:36:15,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641946964] [2020-10-20 06:36:15,513 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:36:15,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:36:15,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:36:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:36:15,535 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-10-20 06:36:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:36:15,566 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-10-20 06:36:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:36:15,569 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-10-20 06:36:15,578 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 06:36:15,582 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2020-10-20 06:36:15,583 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-10-20 06:36:15,584 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-20 06:36:15,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2020-10-20 06:36:15,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:36:15,585 INFO L691 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-10-20 06:36:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2020-10-20 06:36:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-10-20 06:36:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 06:36:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2020-10-20 06:36:15,610 INFO L714 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-10-20 06:36:15,610 INFO L594 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-10-20 06:36:15,611 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:36:15,611 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2020-10-20 06:36:15,611 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-20 06:36:15,611 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:15,611 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:15,612 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:36:15,612 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 06:36:15,612 INFO L794 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 27#L11-2 [2020-10-20 06:36:15,612 INFO L796 eck$LassoCheckResult]: Loop: 27#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 29#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 30#L13-2 assume !(main_~y~0 < main_~x~0); 26#L13-3 main_~x~0 := main_~x~0 - 1; 27#L11-2 [2020-10-20 06:36:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-10-20 06:36:15,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:15,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194588415] [2020-10-20 06:36:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,622 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2020-10-20 06:36:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:15,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956647628] [2020-10-20 06:36:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,638 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,639 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 29869391, now seen corresponding path program 1 times [2020-10-20 06:36:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:15,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253264259] [2020-10-20 06:36:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:15,654 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:15,657 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:15,742 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:15,743 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:15,743 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:15,744 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:15,744 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:36:15,744 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:15,744 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:15,744 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:15,745 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration2_Loop [2020-10-20 06:36:15,745 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:15,745 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:15,765 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 06:36:15,787 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 06:36:15,791 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 06:36:15,885 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:15,886 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 06:36:15,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:15,892 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 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) [2020-10-20 06:36:15,938 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:36:15,938 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:15,982 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:36:15,984 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:15,985 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:15,985 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:15,985 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:15,985 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:36:15,985 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:15,985 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:15,985 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:15,986 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration2_Loop [2020-10-20 06:36:15,986 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:15,986 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:15,988 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 06:36:16,001 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 06:36:16,005 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 06:36:16,077 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:16,083 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 06:36:16,094 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 06:36:16,097 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:16,097 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:36:16,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:16,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:16,098 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:16,101 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:36:16,102 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:16,105 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:36:16,114 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:36:16,114 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:16,130 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:36:16,130 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:36:16,131 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:36:16,132 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:16,166 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:36:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:36:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 06:36:16,234 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-20 06:36:16,236 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-20 06:36:16,274 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5 states and 6 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 9 states and 12 transitions. Complement of second has 4 states. [2020-10-20 06:36:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:36:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-20 06:36:16,278 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 4 letters. [2020-10-20 06:36:16,278 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:16,278 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 4 letters. [2020-10-20 06:36:16,279 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:16,279 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 8 letters. [2020-10-20 06:36:16,279 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:16,280 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 12 transitions. [2020-10-20 06:36:16,281 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:36:16,281 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 11 transitions. [2020-10-20 06:36:16,282 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-10-20 06:36:16,282 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-10-20 06:36:16,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2020-10-20 06:36:16,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:36:16,283 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-10-20 06:36:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2020-10-20 06:36:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-10-20 06:36:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 06:36:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-10-20 06:36:16,285 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:36:16,285 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:36:16,285 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:36:16,286 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-10-20 06:36:16,286 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:36:16,287 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:16,287 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:16,287 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-20 06:36:16,287 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-20 06:36:16,288 INFO L794 eck$LassoCheckResult]: Stem: 77#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 78#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 79#L13-2 [2020-10-20 06:36:16,288 INFO L796 eck$LassoCheckResult]: Loop: 79#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 79#L13-2 [2020-10-20 06:36:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-20 06:36:16,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:16,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435668795] [2020-10-20 06:36:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:16,294 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:16,297 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:16,299 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-10-20 06:36:16,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:16,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133590039] [2020-10-20 06:36:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:16,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:16,308 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:16,309 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-10-20 06:36:16,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:16,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504973803] [2020-10-20 06:36:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:16,316 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:16,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:16,322 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:16,366 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:16,367 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:16,367 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:16,367 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:16,367 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:36:16,367 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:16,367 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:16,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:16,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration3_Loop [2020-10-20 06:36:16,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:16,370 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:16,371 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 06:36:16,379 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 06:36:16,386 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 06:36:16,428 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:16,428 INFO L404 LassoAnalysis]: Checking for nontermination... 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 06:36:16,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:16,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:16,444 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:36:16,444 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 06:36:16,477 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:16,477 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:16,505 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:36:16,506 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:16,657 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:36:16,659 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:16,659 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:16,660 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:16,660 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:16,660 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:36:16,660 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:16,660 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:16,660 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:16,660 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration3_Loop [2020-10-20 06:36:16,660 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:16,660 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:16,662 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 06:36:16,666 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 06:36:16,674 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 06:36:16,717 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:16,717 INFO L489 LassoAnalysis]: Using template 'affine'. 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 06:36:16,728 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 06:36:16,730 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:16,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:16,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:16,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:16,735 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:36:16,735 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:36:16,741 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 06:36:16,785 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 06:36:16,786 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:16,787 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:36:16,787 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:16,794 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:16,794 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:16,796 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:36:16,797 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:36:16,800 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:36:16,805 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-20 06:36:16,805 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:36:16,811 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:36:16,811 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:36:16,811 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:36:16,812 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2020-10-20 06:36:16,852 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:36:16,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:16,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:36:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:16,894 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 06:36:16,895 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-20 06:36:16,895 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-10-20 06:36:16,920 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 15 states and 20 transitions. Complement of second has 5 states. [2020-10-20 06:36:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-20 06:36:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-20 06:36:16,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-10-20 06:36:16,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:16,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-10-20 06:36:16,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:16,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-10-20 06:36:16,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:16,924 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 20 transitions. [2020-10-20 06:36:16,926 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:36:16,927 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 11 states and 15 transitions. [2020-10-20 06:36:16,927 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-10-20 06:36:16,927 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-10-20 06:36:16,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 15 transitions. [2020-10-20 06:36:16,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:36:16,927 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 15 transitions. [2020-10-20 06:36:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 15 transitions. [2020-10-20 06:36:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 7. [2020-10-20 06:36:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 06:36:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2020-10-20 06:36:16,932 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2020-10-20 06:36:16,932 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2020-10-20 06:36:16,932 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:36:16,932 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2020-10-20 06:36:16,936 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-10-20 06:36:16,937 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:16,937 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:16,937 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2020-10-20 06:36:16,938 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-20 06:36:16,938 INFO L794 eck$LassoCheckResult]: Stem: 128#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 129#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 131#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 132#L13-2 assume !(main_~y~0 < main_~x~0); 126#L13-3 main_~x~0 := main_~x~0 - 1; 127#L11-2 assume !!(main_~x~0 > 0);main_~y~0 := 0; 130#L13-2 [2020-10-20 06:36:16,938 INFO L796 eck$LassoCheckResult]: Loop: 130#L13-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 130#L13-2 [2020-10-20 06:36:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 2 times [2020-10-20 06:36:16,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:16,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179632833] [2020-10-20 06:36:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:36:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179632833] [2020-10-20 06:36:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264487008] [2020-10-20 06:36:17,003 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:36:17,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 06:36:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:36:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:36:17,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:36:17,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-20 06:36:17,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885953427] [2020-10-20 06:36:17,091 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 06:36:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:17,091 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-10-20 06:36:17,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:17,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058198465] [2020-10-20 06:36:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:17,106 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:17,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:17,116 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:17,129 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:17,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:17,130 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:17,130 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:17,130 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:36:17,130 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:17,130 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:17,130 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:17,130 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration4_Loop [2020-10-20 06:36:17,131 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:17,131 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:17,132 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 06:36:17,140 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 06:36:17,147 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 06:36:17,225 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:17,225 INFO L404 LassoAnalysis]: Checking for nontermination... 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 06:36:17,236 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:17,236 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:17,240 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:36:17,240 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 06:36:17,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:17,290 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 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 06:36:17,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:36:17,347 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 [2020-10-20 06:36:17,587 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:36:17,589 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:17,590 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:17,590 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:17,590 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:17,590 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:36:17,590 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:17,590 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:17,590 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:17,590 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.01.c_Iteration4_Loop [2020-10-20 06:36:17,591 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:17,591 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:17,593 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 06:36:17,600 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 06:36:17,609 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 06:36:17,654 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:17,655 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:17,665 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 06:36:17,667 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:17,667 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:17,667 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:17,667 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:17,672 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:36:17,674 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:36:17,679 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:17,722 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 06:36:17,724 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:17,724 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:36:17,724 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:17,724 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:17,724 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:17,726 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:36:17,726 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:36:17,729 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:36:17,742 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-20 06:36:17,742 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:17,754 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:36:17,754 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:36:17,755 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:36:17,755 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:17,781 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:36:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,807 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 06:36:17,808 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-20 06:36:17,808 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-10-20 06:36:17,860 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 13 states and 17 transitions. Complement of second has 5 states. [2020-10-20 06:36:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-20 06:36:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-20 06:36:17,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2020-10-20 06:36:17,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:17,863 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:36:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,888 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 06:36:17,889 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-20 06:36:17,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-10-20 06:36:17,899 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 13 states and 17 transitions. Complement of second has 5 states. [2020-10-20 06:36:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-20 06:36:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-20 06:36:17,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2020-10-20 06:36:17,901 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:17,901 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:36:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:17,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:36:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:17,924 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 06:36:17,925 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-20 06:36:17,925 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-10-20 06:36:17,937 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 10 states and 12 transitions. Complement of second has 4 states. [2020-10-20 06:36:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-20 06:36:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-10-20 06:36:17,938 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2020-10-20 06:36:17,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:17,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2020-10-20 06:36:17,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:17,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2020-10-20 06:36:17,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:17,940 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2020-10-20 06:36:17,941 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:36:17,941 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 0 states and 0 transitions. [2020-10-20 06:36:17,941 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:36:17,941 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:36:17,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:36:17,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:36:17,941 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:17,942 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:17,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:36:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:36:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:36:17,943 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 6 states. [2020-10-20 06:36:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:36:17,943 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-20 06:36:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 06:36:17,944 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-20 06:36:17,944 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:36:17,944 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:36:17,944 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:36:17,944 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:36:17,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:36:17,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:36:17,944 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:17,944 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:17,945 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:17,945 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 06:36:17,945 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:36:17,945 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:36:17,945 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 06:36:17,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:36:17 BoogieIcfgContainer [2020-10-20 06:36:17,952 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:36:17,952 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:36:17,952 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:36:17,952 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:36:17,953 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:36:15" (3/4) ... [2020-10-20 06:36:17,957 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:36:17,957 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:36:17,960 INFO L168 Benchmark]: Toolchain (without parser) took 3415.74 ms. Allocated memory was 36.2 MB in the beginning and 53.5 MB in the end (delta: 17.3 MB). Free memory was 10.2 MB in the beginning and 20.6 MB in the end (delta: -10.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,961 INFO L168 Benchmark]: CDTParser took 1.09 ms. Allocated memory is still 35.7 MB. Free memory was 14.5 MB in the beginning and 14.5 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.21 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 9.3 MB in the beginning and 28.8 MB in the end (delta: -19.4 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.52 ms. Allocated memory is still 44.6 MB. Free memory was 28.6 MB in the beginning and 27.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,963 INFO L168 Benchmark]: Boogie Preprocessor took 16.94 ms. Allocated memory is still 44.6 MB. Free memory was 27.2 MB in the beginning and 26.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,964 INFO L168 Benchmark]: RCFGBuilder took 213.28 ms. Allocated memory is still 44.6 MB. Free memory was 26.0 MB in the beginning and 17.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,965 INFO L168 Benchmark]: BuchiAutomizer took 2813.52 ms. Allocated memory was 44.6 MB in the beginning and 53.5 MB in the end (delta: 8.9 MB). Free memory was 17.1 MB in the beginning and 21.1 MB in the end (delta: -4.0 MB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,966 INFO L168 Benchmark]: Witness Printer took 4.85 ms. Allocated memory is still 53.5 MB. Free memory was 21.1 MB in the beginning and 20.6 MB in the end (delta: 486.6 kB). Peak memory consumption was 486.6 kB. Max. memory is 14.3 GB. [2020-10-20 06:36:17,972 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.09 ms. Allocated memory is still 35.7 MB. Free memory was 14.5 MB in the beginning and 14.5 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 324.21 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 9.3 MB in the beginning and 28.8 MB in the end (delta: -19.4 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 28.52 ms. Allocated memory is still 44.6 MB. Free memory was 28.6 MB in the beginning and 27.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 16.94 ms. Allocated memory is still 44.6 MB. Free memory was 27.2 MB in the beginning and 26.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 213.28 ms. Allocated memory is still 44.6 MB. Free memory was 26.0 MB in the beginning and 17.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 2813.52 ms. Allocated memory was 44.6 MB in the beginning and 53.5 MB in the end (delta: 8.9 MB). Free memory was 17.1 MB in the beginning and 21.1 MB in the end (delta: -4.0 MB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. * Witness Printer took 4.85 ms. Allocated memory is still 53.5 MB. Free memory was 21.1 MB in the beginning and 20.6 MB in the end (delta: 486.6 kB). Peak memory consumption was 486.6 kB. 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 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 3 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One nondeterministic module has affine ranking function -1 * y + x and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.7s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.1s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 20 SDtfs, 14 SDslu, 3 SDs, 0 SdLazy, 42 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp95 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...