./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/b.12.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/b.12.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 f29b9a2e4c338e2b37ca8ba7d6a8b859a8519aff ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 06:36:34,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:36:34,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:36:34,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:36:34,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:36:34,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:36:34,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:36:34,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:36:34,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:36:34,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:36:34,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:36:34,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:36:34,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:36:34,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:36:34,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:36:34,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:36:34,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:36:34,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:36:34,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:36:34,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:36:34,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:36:34,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:36:34,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:36:34,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:36:34,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:36:34,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:36:34,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:36:34,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:36:34,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:36:34,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:36:34,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:36:34,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:36:34,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:36:34,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:36:34,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:36:34,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:36:34,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:36:34,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:36:34,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:36:34,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:36:34,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:36:34,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:36:34,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:36:34,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:36:34,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:36:34,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:36:34,552 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:36:34,552 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:36:34,552 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:36:34,553 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:36:34,553 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:36:34,553 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:36:34,554 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:36:34,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:36:34,555 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:36:34,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:36:34,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:36:34,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:36:34,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:36:34,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:36:34,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:36:34,557 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:36:34,557 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:36:34,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:36:34,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:36:34,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:36:34,558 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:36:34,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:36:34,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:36:34,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:36:34,559 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:36:34,560 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:36:34,561 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 -> f29b9a2e4c338e2b37ca8ba7d6a8b859a8519aff [2020-10-20 06:36:34,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:36:34,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:36:34,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:36:34,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:36:34,825 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:36:34,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/b.12.c [2020-10-20 06:36:34,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8f0f51f9/9ba55e999f0b40f383f3dce39410cebc/FLAG17e58f63c [2020-10-20 06:36:35,360 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:36:35,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/b.12.c [2020-10-20 06:36:35,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8f0f51f9/9ba55e999f0b40f383f3dce39410cebc/FLAG17e58f63c [2020-10-20 06:36:35,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8f0f51f9/9ba55e999f0b40f383f3dce39410cebc [2020-10-20 06:36:35,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:36:35,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:36:35,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:36:35,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:36:35,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:36:35,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:36:35" (1/1) ... [2020-10-20 06:36:35,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b180d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:35, skipping insertion in model container [2020-10-20 06:36:35,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:36:35" (1/1) ... [2020-10-20 06:36:35,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:36:35,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:36:36,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:36:36,087 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:36:36,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:36:36,118 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:36:36,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36 WrapperNode [2020-10-20 06:36:36,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:36:36,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:36:36,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:36:36,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:36:36,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:36:36,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:36:36,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:36:36,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:36:36,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (1/1) ... [2020-10-20 06:36:36,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:36:36,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:36:36,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:36:36,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:36:36,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (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 06:36:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:36:36,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:36:36,422 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:36:36,422 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-20 06:36:36,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:36:36 BoogieIcfgContainer [2020-10-20 06:36:36,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:36:36,425 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:36:36,425 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:36:36,429 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:36:36,430 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:36:36,431 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:36:35" (1/3) ... [2020-10-20 06:36:36,432 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3b9bdd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:36:36, skipping insertion in model container [2020-10-20 06:36:36,433 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:36:36,433 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:36:36" (2/3) ... [2020-10-20 06:36:36,433 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3b9bdd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:36:36, skipping insertion in model container [2020-10-20 06:36:36,434 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:36:36,434 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:36:36" (3/3) ... [2020-10-20 06:36:36,436 INFO L373 chiAutomizerObserver]: Analyzing ICFG b.12.c [2020-10-20 06:36:36,481 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:36:36,482 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:36:36,482 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:36:36,482 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:36:36,482 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:36:36,482 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:36:36,482 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:36:36,483 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:36:36,496 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-20 06:36:36,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:36,516 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:36,517 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:36,523 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:36:36,523 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:36:36,523 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:36:36,523 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-20 06:36:36,524 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:36,525 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:36,525 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:36,525 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:36:36,526 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:36:36,532 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 8#L15-2true [2020-10-20 06:36:36,533 INFO L796 eck$LassoCheckResult]: Loop: 8#L15-2true assume !!(main_~x~0 > 0 || main_~y~0 > 0); 6#L12true assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 8#L15-2true [2020-10-20 06:36:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:36,538 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-20 06:36:36,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:36,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278738897] [2020-10-20 06:36:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:36,625 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:36,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:36,647 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-10-20 06:36:36,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:36,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078249334] [2020-10-20 06:36:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:36,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:36,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:36,666 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-10-20 06:36:36,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:36,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561573798] [2020-10-20 06:36:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:36,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:36,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:36,694 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:36,757 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:36,758 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:36,758 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:36,758 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:36,758 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:36:36,758 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:36,759 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:36,759 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:36,759 INFO L133 ssoRankerPreferences]: Filename of dumped script: b.12.c_Iteration1_Loop [2020-10-20 06:36:36,759 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:36,759 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:36,784 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 06:36:36,794 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 06:36:36,800 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 06:36:36,893 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:36,894 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:36,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:36,917 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:36,927 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:36:36,927 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:36,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:36,975 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:36,985 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:36:36,985 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,020 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:37,020 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:36:37,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:37,092 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:36:37,094 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:37,095 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:37,095 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:37,095 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:37,095 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:36:37,095 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,095 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:37,095 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:37,096 INFO L133 ssoRankerPreferences]: Filename of dumped script: b.12.c_Iteration1_Loop [2020-10-20 06:36:37,096 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:37,096 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:37,098 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 06:36:37,115 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 06:36:37,121 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 06:36:37,172 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:37,178 INFO L489 LassoAnalysis]: Using template 'affine'. 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 06:36:37,190 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 06:36:37,193 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:37,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:37,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:37,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:37,200 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:36:37,200 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:36:37,207 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:37,253 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,255 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:37,256 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:37,256 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:37,256 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:37,260 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:36:37,261 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:36:37,266 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:37,312 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 06:36:37,314 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:37,315 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:36:37,315 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:37,315 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:37,315 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:37,317 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:36:37,317 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,326 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:36:37,331 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:36:37,332 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:37,345 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:36:37,346 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:36:37,346 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:36:37,347 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,383 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:36:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:37,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:36:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:37,465 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 06:36:37,483 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 06:36:37,485 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2020-10-20 06:36:37,542 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 23 states and 34 transitions. Complement of second has 5 states. [2020-10-20 06:36:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:36:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-10-20 06:36:37,546 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 2 letters. [2020-10-20 06:36:37,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:37,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-20 06:36:37,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:37,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 4 letters. [2020-10-20 06:36:37,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:37,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 34 transitions. [2020-10-20 06:36:37,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:37,557 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 10 states and 15 transitions. [2020-10-20 06:36:37,558 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-10-20 06:36:37,558 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-10-20 06:36:37,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 15 transitions. [2020-10-20 06:36:37,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:36:37,559 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2020-10-20 06:36:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 15 transitions. [2020-10-20 06:36:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-10-20 06:36:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 06:36:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2020-10-20 06:36:37,581 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-10-20 06:36:37,582 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-10-20 06:36:37,582 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:36:37,582 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 14 transitions. [2020-10-20 06:36:37,583 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:37,583 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:37,583 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:37,584 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-20 06:36:37,584 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:36:37,584 INFO L794 eck$LassoCheckResult]: Stem: 67#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 68#L15-2 assume !!(main_~x~0 > 0 || main_~y~0 > 0); 69#L12 [2020-10-20 06:36:37,584 INFO L796 eck$LassoCheckResult]: Loop: 69#L12 assume !(main_~x~0 > 0); 63#L15 assume main_~y~0 > 0;main_~y~0 := main_~y~0 - 1; 64#L15-2 assume !!(main_~x~0 > 0 || main_~y~0 > 0); 69#L12 [2020-10-20 06:36:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-20 06:36:37,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:37,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288237495] [2020-10-20 06:36:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:37,590 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:37,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:37,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash 44774, now seen corresponding path program 1 times [2020-10-20 06:36:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500808136] [2020-10-20 06:36:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:37,603 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:37,606 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:37,609 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash 29865565, now seen corresponding path program 1 times [2020-10-20 06:36:37,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:37,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347265289] [2020-10-20 06:36:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:37,616 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:37,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:37,623 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:37,672 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:37,672 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:37,672 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:37,672 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:37,673 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:36:37,673 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,673 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:37,673 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:37,673 INFO L133 ssoRankerPreferences]: Filename of dumped script: b.12.c_Iteration2_Loop [2020-10-20 06:36:37,673 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:37,673 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:37,675 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 06:36:37,683 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 06:36:37,688 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 06:36:37,696 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 06:36:37,750 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:37,750 INFO L404 LassoAnalysis]: Checking for nontermination... 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 06:36:37,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:37,758 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:37,761 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:36:37,761 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:37,789 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:37,789 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,793 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:36:37,793 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:36:37,817 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 06:36:37,843 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:36:37,843 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:36:37,905 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:36:37,907 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:36:37,907 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:36:37,907 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:36:37,907 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:36:37,907 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:36:37,908 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:37,908 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:36:37,908 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:36:37,908 INFO L133 ssoRankerPreferences]: Filename of dumped script: b.12.c_Iteration2_Loop [2020-10-20 06:36:37,908 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:36:37,908 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:36:37,910 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 06:36:37,913 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 06:36:37,921 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 06:36:37,928 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 06:36:37,992 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:36:37,992 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:38,008 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 06:36:38,010 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:38,011 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:38,011 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:38,011 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:38,014 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:36:38,014 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:36:38,021 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:38,070 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:38,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:38,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:38,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:38,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:38,076 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:36:38,076 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:36:38,081 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 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 06:36:38,124 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 06:36:38,126 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:36:38,126 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:36:38,126 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:36:38,127 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:36:38,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:36:38,128 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:36:38,128 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:36:38,131 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:36:38,135 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:36:38,135 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:36:38,147 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:36:38,147 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:36:38,147 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:36:38,147 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:36:38,181 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:36:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:36:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:38,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:36:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:36:38,267 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 06:36:38,268 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:36:38,268 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 14 transitions. cyclomatic complexity: 7 Second operand 4 states. [2020-10-20 06:36:38,343 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 14 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 35 states and 53 transitions. Complement of second has 7 states. [2020-10-20 06:36:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 06:36:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:36:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-10-20 06:36:38,345 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 2 letters. Loop has 3 letters. [2020-10-20 06:36:38,345 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:38,345 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 5 letters. Loop has 3 letters. [2020-10-20 06:36:38,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:38,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 2 letters. Loop has 6 letters. [2020-10-20 06:36:38,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:36:38,346 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 53 transitions. [2020-10-20 06:36:38,349 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:38,350 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 24 states and 35 transitions. [2020-10-20 06:36:38,350 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-20 06:36:38,350 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-10-20 06:36:38,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2020-10-20 06:36:38,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:36:38,351 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2020-10-20 06:36:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2020-10-20 06:36:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-10-20 06:36:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 06:36:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2020-10-20 06:36:38,355 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 31 transitions. [2020-10-20 06:36:38,355 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 31 transitions. [2020-10-20 06:36:38,355 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:36:38,355 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 31 transitions. [2020-10-20 06:36:38,356 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 06:36:38,357 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:36:38,357 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:36:38,357 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:36:38,357 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:36:38,357 INFO L794 eck$LassoCheckResult]: Stem: 152#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 153#L15-2 assume !!(main_~x~0 > 0 || main_~y~0 > 0); 163#L12 assume !(main_~x~0 > 0); 147#L15 [2020-10-20 06:36:38,358 INFO L796 eck$LassoCheckResult]: Loop: 147#L15 assume !(main_~y~0 > 0); 148#L15-2 assume !!(main_~x~0 > 0 || main_~y~0 > 0); 154#L12 assume !(main_~x~0 > 0); 147#L15 [2020-10-20 06:36:38,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-10-20 06:36:38,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:38,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902550297] [2020-10-20 06:36:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:38,363 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:36:38,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:36:38,368 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:36:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:36:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 49336, now seen corresponding path program 1 times [2020-10-20 06:36:38,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:36:38,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991981817] [2020-10-20 06:36:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:36:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:36:38,408 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 06:36:38,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991981817] [2020-10-20 06:36:38,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:36:38,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:36:38,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626066110] [2020-10-20 06:36:38,413 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:36:38,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:36:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:36:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:36:38,418 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. cyclomatic complexity: 15 Second operand 4 states. [2020-10-20 06:36:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:36:38,449 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2020-10-20 06:36:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:36:38,449 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 30 transitions. [2020-10-20 06:36:38,450 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:36:38,450 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2020-10-20 06:36:38,451 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:36:38,451 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:36:38,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:36:38,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:36:38,451 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:38,451 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:38,451 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:36:38,451 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:36:38,451 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:36:38,452 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:36:38,452 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 06:36:38,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:36:38 BoogieIcfgContainer [2020-10-20 06:36:38,460 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:36:38,461 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:36:38,461 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:36:38,461 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:36:38,462 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:36:36" (3/4) ... [2020-10-20 06:36:38,466 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:36:38,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:36:38,469 INFO L168 Benchmark]: Toolchain (without parser) took 2691.27 ms. Allocated memory was 35.1 MB in the beginning and 51.4 MB in the end (delta: 16.3 MB). Free memory was 12.4 MB in the beginning and 19.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,471 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 40.5 kB). Peak memory consumption was 40.5 kB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.56 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 11.5 MB in the beginning and 24.9 MB in the end (delta: -13.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.30 ms. Allocated memory is still 43.5 MB. Free memory was 24.9 MB in the beginning and 23.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,474 INFO L168 Benchmark]: Boogie Preprocessor took 20.07 ms. Allocated memory is still 43.5 MB. Free memory was 23.4 MB in the beginning and 22.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,475 INFO L168 Benchmark]: RCFGBuilder took 249.90 ms. Allocated memory was 43.5 MB in the beginning and 46.1 MB in the end (delta: 2.6 MB). Free memory was 22.1 MB in the beginning and 25.3 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,476 INFO L168 Benchmark]: BuchiAutomizer took 2035.19 ms. Allocated memory was 46.1 MB in the beginning and 51.4 MB in the end (delta: 5.2 MB). Free memory was 25.1 MB in the beginning and 20.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,477 INFO L168 Benchmark]: Witness Printer took 5.64 ms. Allocated memory is still 51.4 MB. Free memory was 20.3 MB in the beginning and 19.9 MB in the end (delta: 414.7 kB). Peak memory consumption was 414.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:36:38,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 40.5 kB). Peak memory consumption was 40.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 336.56 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 11.5 MB in the beginning and 24.9 MB in the end (delta: -13.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.30 ms. Allocated memory is still 43.5 MB. Free memory was 24.9 MB in the beginning and 23.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 20.07 ms. Allocated memory is still 43.5 MB. Free memory was 23.4 MB in the beginning and 22.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 249.90 ms. Allocated memory was 43.5 MB in the beginning and 46.1 MB in the end (delta: 2.6 MB). Free memory was 22.1 MB in the beginning and 25.3 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 2035.19 ms. Allocated memory was 46.1 MB in the beginning and 51.4 MB in the end (delta: 5.2 MB). Free memory was 25.1 MB in the beginning and 20.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * Witness Printer took 5.64 ms. Allocated memory is still 51.4 MB. Free memory was 20.3 MB in the beginning and 19.9 MB in the end (delta: 414.7 kB). Peak memory consumption was 414.7 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 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function x and consists of 4 locations. One deterministic module has affine ranking function y and consists of 5 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.9s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 20 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 16 SDtfs, 16 SDslu, 11 SDs, 0 SdLazy, 32 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax202 hnf98 lsp42 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...