./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.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 2b329fcd1c2ada34efa1c491c6d8d75d6e8a1856 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:43:10,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:43:10,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:43:10,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:43:10,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:43:10,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:43:10,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:43:10,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:43:10,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:43:10,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:43:10,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:43:10,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:43:10,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:43:10,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:43:10,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:43:10,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:43:10,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:43:10,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:43:10,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:43:10,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:43:10,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:43:10,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:43:10,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:43:10,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:43:10,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:43:10,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:43:10,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:43:10,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:43:10,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:43:10,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:43:10,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:43:10,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:43:10,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:43:10,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:43:10,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:43:10,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:43:10,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:43:10,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:43:10,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:43:10,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:43:10,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:43:10,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:43:10,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:43:10,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:43:10,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:43:10,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:43:10,555 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:43:10,555 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:43:10,555 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:43:10,555 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:43:10,556 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:43:10,556 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:43:10,556 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:43:10,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:43:10,557 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:43:10,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:43:10,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:43:10,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:43:10,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:43:10,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:43:10,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:43:10,559 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:43:10,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:43:10,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:43:10,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:43:10,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:43:10,560 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:43:10,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:43:10,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:43:10,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:43:10,561 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:43:10,562 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:43:10,563 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 -> 2b329fcd1c2ada34efa1c491c6d8d75d6e8a1856 [2020-10-19 18:43:10,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:43:10,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:43:10,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:43:10,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:43:10,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:43:10,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.c [2020-10-19 18:43:10,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3cafc0a9/4de2a956519242158ea3253fefd1b167/FLAG3c4bff7e2 [2020-10-19 18:43:11,431 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:43:11,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.c [2020-10-19 18:43:11,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3cafc0a9/4de2a956519242158ea3253fefd1b167/FLAG3c4bff7e2 [2020-10-19 18:43:11,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3cafc0a9/4de2a956519242158ea3253fefd1b167 [2020-10-19 18:43:11,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:43:11,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:43:11,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:43:11,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:43:11,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:43:11,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:43:11" (1/1) ... [2020-10-19 18:43:11,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2e156b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:11, skipping insertion in model container [2020-10-19 18:43:11,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:43:11" (1/1) ... [2020-10-19 18:43:11,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:43:11,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:43:12,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:43:12,044 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:43:12,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:43:12,070 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:43:12,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12 WrapperNode [2020-10-19 18:43:12,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:43:12,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:43:12,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:43:12,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:43:12,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:43:12,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:43:12,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:43:12,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:43:12,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... [2020-10-19 18:43:12,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:43:12,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:43:12,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:43:12,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:43:12,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:43:12,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:43:12,392 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:43:12,392 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-19 18:43:12,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:43:12 BoogieIcfgContainer [2020-10-19 18:43:12,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:43:12,394 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:43:12,395 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:43:12,398 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:43:12,399 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:43:12,399 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:43:11" (1/3) ... [2020-10-19 18:43:12,400 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@560060e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:43:12, skipping insertion in model container [2020-10-19 18:43:12,400 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:43:12,400 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:43:12" (2/3) ... [2020-10-19 18:43:12,401 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@560060e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:43:12, skipping insertion in model container [2020-10-19 18:43:12,401 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:43:12,401 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:43:12" (3/3) ... [2020-10-19 18:43:12,403 INFO L373 chiAutomizerObserver]: Analyzing ICFG UpAndDownIneq.c [2020-10-19 18:43:12,446 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:43:12,447 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:43:12,447 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:43:12,447 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:43:12,448 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:43:12,448 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:43:12,448 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:43:12,448 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:43:12,463 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-10-19 18:43:12,482 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:43:12,483 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:12,483 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:12,488 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:43:12,488 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:12,488 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:43:12,489 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-10-19 18:43:12,490 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 18:43:12,490 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:12,490 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:12,491 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:43:12,491 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:12,497 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 5#L18-1true [2020-10-19 18:43:12,498 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-1true assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6#L12true assume main_~i~0 >= 10;main_~up~0 := 0; 3#L12-2true assume main_~i~0 <= 0;main_~up~0 := 1; 9#L15-1true assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5#L18-1true [2020-10-19 18:43:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-19 18:43:12,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:12,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127601024] [2020-10-19 18:43:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,585 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,602 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:12,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1234538, now seen corresponding path program 1 times [2020-10-19 18:43:12,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:12,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089446050] [2020-10-19 18:43:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:12,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089446050] [2020-10-19 18:43:12,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:43:12,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:43:12,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077399821] [2020-10-19 18:43:12,692 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:12,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:43:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:43:12,718 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-10-19 18:43:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:12,774 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2020-10-19 18:43:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:43:12,778 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 21 transitions. [2020-10-19 18:43:12,780 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:43:12,787 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 9 states and 13 transitions. [2020-10-19 18:43:12,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-19 18:43:12,789 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-10-19 18:43:12,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 13 transitions. [2020-10-19 18:43:12,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:43:12,791 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-10-19 18:43:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 13 transitions. [2020-10-19 18:43:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-19 18:43:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 18:43:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2020-10-19 18:43:12,829 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-10-19 18:43:12,829 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-10-19 18:43:12,830 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:43:12,830 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 13 transitions. [2020-10-19 18:43:12,831 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-10-19 18:43:12,831 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:12,831 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:12,832 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:43:12,832 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:12,832 INFO L794 eck$LassoCheckResult]: Stem: 37#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 38#L18-1 [2020-10-19 18:43:12,833 INFO L796 eck$LassoCheckResult]: Loop: 38#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 43#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 35#L12-2 assume !(main_~i~0 <= 0); 36#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 38#L18-1 [2020-10-19 18:43:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-10-19 18:43:12,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:12,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110456990] [2020-10-19 18:43:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,846 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,848 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1234602, now seen corresponding path program 1 times [2020-10-19 18:43:12,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:12,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142677659] [2020-10-19 18:43:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,864 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,871 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,873 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:12,874 INFO L82 PathProgramCache]: Analyzing trace with hash 29863753, now seen corresponding path program 1 times [2020-10-19 18:43:12,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:12,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331849179] [2020-10-19 18:43:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:12,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:12,895 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:13,072 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2020-10-19 18:43:13,104 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:13,105 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:13,105 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:13,105 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:13,106 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:13,106 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,107 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:13,107 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:13,107 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration2_Loop [2020-10-19 18:43:13,107 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:13,108 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:13,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,263 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:13,264 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 [2020-10-19 18:43:13,278 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:13,278 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:13,288 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:13,288 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 [2020-10-19 18:43:13,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:13,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:13,328 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:13,328 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) [2020-10-19 18:43:13,373 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:13,373 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,378 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:13,378 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:13,426 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:13,426 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:13,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:13,468 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,483 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:13,513 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:13,513 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:13,513 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:13,513 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:13,513 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:13,513 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,514 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:13,514 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:13,514 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration2_Loop [2020-10-19 18:43:13,515 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:13,515 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:13,517 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:13,623 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:13,630 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2020-10-19 18:43:13,642 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:13,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:13,645 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:13,645 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:13,645 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:13,651 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:13,651 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:13,657 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) [2020-10-19 18:43:13,701 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:13,703 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:13,703 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:13,703 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:13,703 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,707 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:13,708 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:13,713 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:13,748 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:13,750 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:13,750 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:13,751 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:13,751 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:13,752 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:13,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:13,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,760 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 [2020-10-19 18:43:13,794 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:13,800 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:13,801 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:13,801 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:13,801 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:13,801 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:13,804 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:13,804 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:13,807 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:13,813 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:13,814 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:13,821 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:13,821 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:13,822 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:13,822 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:13,857 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:13,933 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 [2020-10-19 18:43:13,934 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-10-19 18:43:13,989 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 24 states and 36 transitions. Complement of second has 7 states. [2020-10-19 18:43:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2020-10-19 18:43:13,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 1 letters. Loop has 4 letters. [2020-10-19 18:43:13,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:13,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 4 letters. [2020-10-19 18:43:13,996 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:13,996 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 1 letters. Loop has 8 letters. [2020-10-19 18:43:13,996 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:13,997 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 36 transitions. [2020-10-19 18:43:13,998 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-10-19 18:43:14,000 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 36 transitions. [2020-10-19 18:43:14,000 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-19 18:43:14,000 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-10-19 18:43:14,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 36 transitions. [2020-10-19 18:43:14,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:14,001 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 36 transitions. [2020-10-19 18:43:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 36 transitions. [2020-10-19 18:43:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-19 18:43:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 18:43:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2020-10-19 18:43:14,006 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 34 transitions. [2020-10-19 18:43:14,006 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 34 transitions. [2020-10-19 18:43:14,006 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:43:14,006 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 34 transitions. [2020-10-19 18:43:14,007 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-10-19 18:43:14,008 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:14,008 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:14,008 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:43:14,008 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:14,009 INFO L794 eck$LassoCheckResult]: Stem: 111#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 112#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 122#L12 [2020-10-19 18:43:14,009 INFO L796 eck$LassoCheckResult]: Loop: 122#L12 assume !(main_~i~0 >= 10); 125#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 128#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 126#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 122#L12 [2020-10-19 18:43:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-19 18:43:14,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971994103] [2020-10-19 18:43:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,015 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,018 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,019 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1389492, now seen corresponding path program 1 times [2020-10-19 18:43:14,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970725363] [2020-10-19 18:43:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:14,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970725363] [2020-10-19 18:43:14,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:43:14,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:43:14,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425548725] [2020-10-19 18:43:14,037 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:43:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:43:14,037 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. cyclomatic complexity: 14 Second operand 3 states. [2020-10-19 18:43:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:14,049 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2020-10-19 18:43:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:43:14,050 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 41 transitions. [2020-10-19 18:43:14,052 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-10-19 18:43:14,053 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 28 states and 40 transitions. [2020-10-19 18:43:14,053 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-10-19 18:43:14,053 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-10-19 18:43:14,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 40 transitions. [2020-10-19 18:43:14,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:14,054 INFO L691 BuchiCegarLoop]: Abstraction has 28 states and 40 transitions. [2020-10-19 18:43:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 40 transitions. [2020-10-19 18:43:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-19 18:43:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 18:43:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-10-19 18:43:14,058 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-10-19 18:43:14,059 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-10-19 18:43:14,059 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:43:14,059 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 39 transitions. [2020-10-19 18:43:14,060 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-10-19 18:43:14,060 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:14,061 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:14,061 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:43:14,061 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:14,061 INFO L794 eck$LassoCheckResult]: Stem: 169#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 170#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 178#L12 [2020-10-19 18:43:14,062 INFO L796 eck$LassoCheckResult]: Loop: 178#L12 assume !(main_~i~0 >= 10); 185#L12-2 assume !(main_~i~0 <= 0); 189#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 187#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 178#L12 [2020-10-19 18:43:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 2 times [2020-10-19 18:43:14,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699561116] [2020-10-19 18:43:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,068 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,072 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1391414, now seen corresponding path program 1 times [2020-10-19 18:43:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523876412] [2020-10-19 18:43:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,083 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 925835935, now seen corresponding path program 1 times [2020-10-19 18:43:14,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368299058] [2020-10-19 18:43:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,091 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,096 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,098 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:14,135 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:14,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:14,136 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:14,136 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:14,136 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:14,136 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,136 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:14,137 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:14,137 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration4_Loop [2020-10-19 18:43:14,137 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:14,138 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:14,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,208 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:14,208 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-19 18:43:14,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:14,213 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:14,218 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:14,268 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,272 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:14,273 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:14,319 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,324 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:14,324 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,370 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:14,371 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,419 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:14,419 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,476 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:14,479 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:14,479 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:14,479 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:14,479 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:14,479 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:14,480 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,480 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:14,480 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:14,480 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration4_Loop [2020-10-19 18:43:14,480 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:14,480 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:14,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:14,548 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:14,549 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,565 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:14,567 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:14,568 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:14,568 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:14,568 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:14,572 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:14,572 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,585 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,632 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:14,634 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:14,634 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:14,634 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:14,634 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:14,635 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:14,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:14,636 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,638 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,687 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:14,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:14,690 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:14,690 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:14,691 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:14,700 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:14,700 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,713 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,763 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:14,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:14,765 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:14,765 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:14,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:14,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:14,767 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:14,767 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,770 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:14,774 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:14,774 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:14,795 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:14,795 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:14,795 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:14,795 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:14,830 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:14,922 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 18:43:14,922 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 15 Second operand 5 states. [2020-10-19 18:43:14,955 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 45 states and 68 transitions. Complement of second has 7 states. [2020-10-19 18:43:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:43:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-19 18:43:14,957 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 2 letters. Loop has 4 letters. [2020-10-19 18:43:14,957 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:14,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2020-10-19 18:43:14,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:14,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 2 letters. Loop has 8 letters. [2020-10-19 18:43:14,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:14,958 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 68 transitions. [2020-10-19 18:43:14,962 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-10-19 18:43:14,964 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 55 transitions. [2020-10-19 18:43:14,964 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2020-10-19 18:43:14,965 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-19 18:43:14,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 55 transitions. [2020-10-19 18:43:14,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:14,965 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-10-19 18:43:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 55 transitions. [2020-10-19 18:43:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-19 18:43:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:43:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 44 transitions. [2020-10-19 18:43:14,973 INFO L714 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2020-10-19 18:43:14,973 INFO L594 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2020-10-19 18:43:14,974 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 18:43:14,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 44 transitions. [2020-10-19 18:43:14,975 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-10-19 18:43:14,975 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:14,975 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:14,976 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:43:14,976 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:14,976 INFO L794 eck$LassoCheckResult]: Stem: 284#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 285#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 295#L12 assume !(main_~i~0 >= 10); 291#L12-2 [2020-10-19 18:43:14,977 INFO L796 eck$LassoCheckResult]: Loop: 291#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 294#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 286#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 287#L12 assume !(main_~i~0 >= 10); 291#L12-2 [2020-10-19 18:43:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-10-19 18:43:14,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371453815] [2020-10-19 18:43:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,983 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,987 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1513900, now seen corresponding path program 1 times [2020-10-19 18:43:14,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:14,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979205756] [2020-10-19 18:43:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:14,998 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:14,999 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918576, now seen corresponding path program 1 times [2020-10-19 18:43:15,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:15,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814226131] [2020-10-19 18:43:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:15,007 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:15,012 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:15,013 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:15,040 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:15,040 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:15,041 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:15,041 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:15,041 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:15,041 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,041 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:15,041 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:15,041 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration5_Loop [2020-10-19 18:43:15,041 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:15,041 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:15,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,111 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:15,112 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:15,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:15,121 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:15,121 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:15,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:15,167 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:15,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:15,207 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,246 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:15,248 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:15,248 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:15,248 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:15,248 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:15,248 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:15,249 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,249 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:15,249 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:15,249 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration5_Loop [2020-10-19 18:43:15,249 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:15,249 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:15,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,260 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,318 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:15,318 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:15,321 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:15,323 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:15,324 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:15,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:15,324 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:15,324 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:15,326 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:15,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,329 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:15,332 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:15,332 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,356 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:15,356 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:15,357 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:15,357 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 1 Supporting invariants [] [2020-10-19 18:43:15,403 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:15,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:15,505 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 18:43:15,505 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 30 states and 44 transitions. cyclomatic complexity: 17 Second operand 4 states. [2020-10-19 18:43:15,535 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 30 states and 44 transitions. cyclomatic complexity: 17. Second operand 4 states. Result 76 states and 108 transitions. Complement of second has 7 states. [2020-10-19 18:43:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-10-19 18:43:15,537 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-19 18:43:15,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:15,538 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-19 18:43:15,538 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:15,538 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-19 18:43:15,539 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:15,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 76 states and 108 transitions. [2020-10-19 18:43:15,542 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 26 [2020-10-19 18:43:15,543 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 76 states to 68 states and 98 transitions. [2020-10-19 18:43:15,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-10-19 18:43:15,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-10-19 18:43:15,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 98 transitions. [2020-10-19 18:43:15,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:15,545 INFO L691 BuchiCegarLoop]: Abstraction has 68 states and 98 transitions. [2020-10-19 18:43:15,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states and 98 transitions. [2020-10-19 18:43:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-19 18:43:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-19 18:43:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2020-10-19 18:43:15,552 INFO L714 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2020-10-19 18:43:15,552 INFO L594 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2020-10-19 18:43:15,552 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 18:43:15,552 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2020-10-19 18:43:15,554 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-10-19 18:43:15,554 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:15,554 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:15,555 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-19 18:43:15,555 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:15,555 INFO L794 eck$LassoCheckResult]: Stem: 436#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 437#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 449#L12 assume !(main_~i~0 >= 10); 452#L12-2 assume !(main_~i~0 <= 0); 433#L15-1 [2020-10-19 18:43:15,555 INFO L796 eck$LassoCheckResult]: Loop: 433#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 438#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 439#L12 assume !(main_~i~0 >= 10); 432#L12-2 assume !(main_~i~0 <= 0); 433#L15-1 [2020-10-19 18:43:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 963408, now seen corresponding path program 1 times [2020-10-19 18:43:15,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:15,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610013561] [2020-10-19 18:43:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:15,561 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:15,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:15,565 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:15,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1678392, now seen corresponding path program 1 times [2020-10-19 18:43:15,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:15,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859188338] [2020-10-19 18:43:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:15,571 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:15,574 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:15,575 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:15,576 INFO L82 PathProgramCache]: Analyzing trace with hash 670044167, now seen corresponding path program 1 times [2020-10-19 18:43:15,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:15,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490700021] [2020-10-19 18:43:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:15,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490700021] [2020-10-19 18:43:15,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:43:15,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:43:15,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516275542] [2020-10-19 18:43:15,653 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:15,653 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:15,653 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:15,654 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:15,654 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:15,654 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,654 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:15,654 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:15,654 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration6_Loop [2020-10-19 18:43:15,654 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:15,654 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:15,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,722 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:15,722 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,725 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:15,725 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,749 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:15,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:15,856 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:15,857 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:15,857 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:15,857 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:15,858 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:15,858 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:15,858 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,858 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:15,858 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:15,858 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration6_Loop [2020-10-19 18:43:15,858 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:15,858 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:15,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:15,923 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:15,923 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,928 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:15,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:15,930 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:15,930 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:15,930 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:15,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:15,931 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:15,931 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:15,938 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:15,941 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:15,941 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:15,950 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:15,950 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:15,950 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:15,950 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 17 Supporting invariants [] [2020-10-19 18:43:15,970 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:16,038 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 18:43:16,038 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 35 Second operand 4 states. [2020-10-19 18:43:16,086 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 35. Second operand 4 states. Result 155 states and 227 transitions. Complement of second has 7 states. [2020-10-19 18:43:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2020-10-19 18:43:16,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 4 letters. [2020-10-19 18:43:16,087 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:16,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 8 letters. Loop has 4 letters. [2020-10-19 18:43:16,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:16,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 8 letters. [2020-10-19 18:43:16,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:16,088 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 155 states and 227 transitions. [2020-10-19 18:43:16,092 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 43 [2020-10-19 18:43:16,094 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 155 states to 151 states and 219 transitions. [2020-10-19 18:43:16,095 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2020-10-19 18:43:16,095 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 78 [2020-10-19 18:43:16,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 219 transitions. [2020-10-19 18:43:16,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:16,096 INFO L691 BuchiCegarLoop]: Abstraction has 151 states and 219 transitions. [2020-10-19 18:43:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states and 219 transitions. [2020-10-19 18:43:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2020-10-19 18:43:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-19 18:43:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 189 transitions. [2020-10-19 18:43:16,109 INFO L714 BuchiCegarLoop]: Abstraction has 125 states and 189 transitions. [2020-10-19 18:43:16,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:43:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:43:16,110 INFO L87 Difference]: Start difference. First operand 125 states and 189 transitions. Second operand 3 states. [2020-10-19 18:43:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:16,120 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2020-10-19 18:43:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:43:16,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 129 transitions. [2020-10-19 18:43:16,123 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-10-19 18:43:16,124 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 83 states and 115 transitions. [2020-10-19 18:43:16,124 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-10-19 18:43:16,125 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2020-10-19 18:43:16,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 115 transitions. [2020-10-19 18:43:16,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:16,125 INFO L691 BuchiCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-10-19 18:43:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 115 transitions. [2020-10-19 18:43:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-19 18:43:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:43:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2020-10-19 18:43:16,131 INFO L714 BuchiCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-10-19 18:43:16,131 INFO L594 BuchiCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-10-19 18:43:16,131 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 18:43:16,131 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 78 states and 110 transitions. [2020-10-19 18:43:16,132 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 21 [2020-10-19 18:43:16,133 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:16,133 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:16,133 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-10-19 18:43:16,133 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:16,134 INFO L794 eck$LassoCheckResult]: Stem: 919#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 920#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 972#L12 assume !(main_~i~0 >= 10); 970#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 965#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 962#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 957#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 915#L12-2 [2020-10-19 18:43:16,134 INFO L796 eck$LassoCheckResult]: Loop: 915#L12-2 assume !(main_~i~0 <= 0); 916#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 921#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 922#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 915#L12-2 [2020-10-19 18:43:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918578, now seen corresponding path program 1 times [2020-10-19 18:43:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:16,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297140257] [2020-10-19 18:43:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297140257] [2020-10-19 18:43:16,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:43:16,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:43:16,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537227253] [2020-10-19 18:43:16,177 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1575402, now seen corresponding path program 2 times [2020-10-19 18:43:16,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:16,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083057462] [2020-10-19 18:43:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:16,183 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:16,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:16,188 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:16,224 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:16,224 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:16,225 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:16,225 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:16,225 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:16,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:16,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:16,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration7_Loop [2020-10-19 18:43:16,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:16,226 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:16,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,307 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:16,307 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:16,316 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:16,319 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:16,319 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:16,341 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:16,341 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,348 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:16,348 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,371 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:16,371 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:16,374 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:16,375 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:16,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:16,412 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:16,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:16,542 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:16,544 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:16,544 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:16,544 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:16,544 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:16,544 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:16,544 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,545 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:16,545 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:16,545 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration7_Loop [2020-10-19 18:43:16,545 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:16,545 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:16,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,616 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:16,616 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,620 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:16,621 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:16,621 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:16,622 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:16,622 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:16,624 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:16,624 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:16,628 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,650 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:16,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:16,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:16,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:16,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:16,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:16,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:16,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:16,660 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,686 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:16,687 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:16,688 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:16,688 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:16,688 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:16,690 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:16,690 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:16,696 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:16,719 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:16,719 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:16,719 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:16,719 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:16,720 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:16,721 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:16,721 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:16,724 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:16,734 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:16,734 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:16,737 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:16,737 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:16,737 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:16,737 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,765 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:16,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:16,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:16,805 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 [2020-10-19 18:43:16,805 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 78 states and 110 transitions. cyclomatic complexity: 43 Second operand 4 states. [2020-10-19 18:43:16,840 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 78 states and 110 transitions. cyclomatic complexity: 43. Second operand 4 states. Result 148 states and 199 transitions. Complement of second has 7 states. [2020-10-19 18:43:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-10-19 18:43:16,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-19 18:43:16,842 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:16,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 11 letters. Loop has 4 letters. [2020-10-19 18:43:16,842 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:16,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 8 letters. [2020-10-19 18:43:16,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:16,843 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 199 transitions. [2020-10-19 18:43:16,845 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2020-10-19 18:43:16,847 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 121 states and 162 transitions. [2020-10-19 18:43:16,847 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2020-10-19 18:43:16,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-10-19 18:43:16,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 162 transitions. [2020-10-19 18:43:16,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:16,848 INFO L691 BuchiCegarLoop]: Abstraction has 121 states and 162 transitions. [2020-10-19 18:43:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 162 transitions. [2020-10-19 18:43:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2020-10-19 18:43:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-19 18:43:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2020-10-19 18:43:16,855 INFO L714 BuchiCegarLoop]: Abstraction has 101 states and 140 transitions. [2020-10-19 18:43:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:43:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:43:16,856 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand 4 states. [2020-10-19 18:43:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:16,882 INFO L93 Difference]: Finished difference Result 135 states and 179 transitions. [2020-10-19 18:43:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:43:16,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 179 transitions. [2020-10-19 18:43:16,885 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2020-10-19 18:43:16,887 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 128 states and 168 transitions. [2020-10-19 18:43:16,887 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2020-10-19 18:43:16,888 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2020-10-19 18:43:16,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 168 transitions. [2020-10-19 18:43:16,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:16,888 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 168 transitions. [2020-10-19 18:43:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 168 transitions. [2020-10-19 18:43:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 109. [2020-10-19 18:43:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-19 18:43:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-10-19 18:43:16,895 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-10-19 18:43:16,895 INFO L594 BuchiCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-10-19 18:43:16,895 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 18:43:16,895 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 109 states and 142 transitions. [2020-10-19 18:43:16,896 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 23 [2020-10-19 18:43:16,897 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:16,897 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:16,897 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2020-10-19 18:43:16,897 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:16,898 INFO L794 eck$LassoCheckResult]: Stem: 1438#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 1439#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1490#L12 assume !(main_~i~0 >= 10); 1491#L12-2 assume !(main_~i~0 <= 0); 1535#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 1533#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1531#L12 assume !(main_~i~0 >= 10); 1434#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 1435#L15-1 [2020-10-19 18:43:16,898 INFO L796 eck$LassoCheckResult]: Loop: 1435#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 1440#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1441#L12 assume !(main_~i~0 >= 10); 1518#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 1435#L15-1 [2020-10-19 18:43:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash 670103747, now seen corresponding path program 1 times [2020-10-19 18:43:16,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:16,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058066681] [2020-10-19 18:43:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:16,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:16,908 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:16,910 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1678390, now seen corresponding path program 2 times [2020-10-19 18:43:16,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:16,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121036577] [2020-10-19 18:43:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:16,915 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:16,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:16,924 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1635542008, now seen corresponding path program 1 times [2020-10-19 18:43:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:16,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760772746] [2020-10-19 18:43:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:43:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760772746] [2020-10-19 18:43:16,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:43:16,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:43:16,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916229421] [2020-10-19 18:43:16,985 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:16,985 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:16,986 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:16,986 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:16,986 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:16,986 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:16,986 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:16,987 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:16,987 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration8_Loop [2020-10-19 18:43:16,987 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:16,987 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:16,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:16,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,069 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:17,069 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,073 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,073 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:17,076 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:17,076 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,099 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,099 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:17,102 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:17,102 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_11=1} Honda state: {v_rep~unnamed0~0~true_11=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,125 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:17,128 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:17,128 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_11=0} Honda state: {v_rep~unnamed0~0~false_11=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:17,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,151 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,178 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:17,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:17,244 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:17,246 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:17,246 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:17,246 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:17,246 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:17,246 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:17,247 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,247 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:17,247 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:17,247 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration8_Loop [2020-10-19 18:43:17,247 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:17,247 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:17,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,313 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:17,314 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:17,322 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:17,324 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:17,324 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:17,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:17,324 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:17,324 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,325 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:17,325 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:17,328 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 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,348 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:17,349 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:17,349 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:17,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:17,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:17,351 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:17,352 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:17,355 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 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,379 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:17,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:17,381 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:17,381 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:17,381 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:17,383 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:17,383 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:17,388 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:17,424 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:17,426 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:17,426 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:17,427 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:17,427 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:17,427 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:17,428 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:17,429 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,432 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:17,443 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:17,443 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:17,447 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:17,448 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:17,448 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:17,448 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,479 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:17,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:17,521 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 [2020-10-19 18:43:17,522 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 109 states and 142 transitions. cyclomatic complexity: 46 Second operand 3 states. [2020-10-19 18:43:17,563 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 109 states and 142 transitions. cyclomatic complexity: 46. Second operand 3 states. Result 215 states and 277 transitions. Complement of second has 7 states. [2020-10-19 18:43:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:43:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 21 transitions. [2020-10-19 18:43:17,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 8 letters. Loop has 4 letters. [2020-10-19 18:43:17,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:17,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 12 letters. Loop has 4 letters. [2020-10-19 18:43:17,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:17,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 8 letters. Loop has 8 letters. [2020-10-19 18:43:17,566 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:17,566 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 215 states and 277 transitions. [2020-10-19 18:43:17,569 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 32 [2020-10-19 18:43:17,570 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 215 states to 187 states and 239 transitions. [2020-10-19 18:43:17,570 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2020-10-19 18:43:17,571 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 74 [2020-10-19 18:43:17,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 187 states and 239 transitions. [2020-10-19 18:43:17,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:17,571 INFO L691 BuchiCegarLoop]: Abstraction has 187 states and 239 transitions. [2020-10-19 18:43:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states and 239 transitions. [2020-10-19 18:43:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2020-10-19 18:43:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-19 18:43:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2020-10-19 18:43:17,592 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 218 transitions. [2020-10-19 18:43:17,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:17,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:43:17,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:43:17,593 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand 4 states. [2020-10-19 18:43:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:17,630 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2020-10-19 18:43:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:43:17,631 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 162 states and 201 transitions. [2020-10-19 18:43:17,633 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 28 [2020-10-19 18:43:17,634 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 162 states to 110 states and 138 transitions. [2020-10-19 18:43:17,634 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 61 [2020-10-19 18:43:17,635 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 64 [2020-10-19 18:43:17,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 138 transitions. [2020-10-19 18:43:17,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:17,635 INFO L691 BuchiCegarLoop]: Abstraction has 110 states and 138 transitions. [2020-10-19 18:43:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states and 138 transitions. [2020-10-19 18:43:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2020-10-19 18:43:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-19 18:43:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-10-19 18:43:17,639 INFO L714 BuchiCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-10-19 18:43:17,639 INFO L594 BuchiCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-10-19 18:43:17,639 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 18:43:17,639 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 83 states and 103 transitions. [2020-10-19 18:43:17,640 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-10-19 18:43:17,640 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:17,640 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:17,641 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-19 18:43:17,641 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 1, 1, 1] [2020-10-19 18:43:17,641 INFO L794 eck$LassoCheckResult]: Stem: 2153#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2154#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2171#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 2174#L12-2 assume !(main_~i~0 <= 0); 2173#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2170#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2159#L12 assume !(main_~i~0 >= 10); 2160#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2218#L15-1 [2020-10-19 18:43:17,641 INFO L796 eck$LassoCheckResult]: Loop: 2218#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2155#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2156#L12 assume !(main_~i~0 >= 10); 2219#L12-2 assume !(main_~i~0 <= 0); 2220#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2229#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2228#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 2149#L12-2 assume !(main_~i~0 <= 0); 2150#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2223#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2222#L12 assume !(main_~i~0 >= 10); 2221#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2218#L15-1 [2020-10-19 18:43:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 612845445, now seen corresponding path program 1 times [2020-10-19 18:43:17,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:17,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836557899] [2020-10-19 18:43:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:17,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836557899] [2020-10-19 18:43:17,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034217807] [2020-10-19 18:43:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:17,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:43:17,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:17,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:17,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-10-19 18:43:17,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303046072] [2020-10-19 18:43:17,686 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1192554916, now seen corresponding path program 1 times [2020-10-19 18:43:17,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:17,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603600120] [2020-10-19 18:43:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-19 18:43:17,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603600120] [2020-10-19 18:43:17,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242111114] [2020-10-19 18:43:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:17,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:43:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-19 18:43:17,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:17,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-10-19 18:43:17,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117336056] [2020-10-19 18:43:17,750 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:17,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:43:17,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:43:17,751 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. cyclomatic complexity: 28 Second operand 4 states. [2020-10-19 18:43:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:17,781 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-19 18:43:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:43:17,782 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 87 states and 106 transitions. [2020-10-19 18:43:17,783 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-10-19 18:43:17,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 87 states to 80 states and 98 transitions. [2020-10-19 18:43:17,784 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2020-10-19 18:43:17,785 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2020-10-19 18:43:17,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 98 transitions. [2020-10-19 18:43:17,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:17,785 INFO L691 BuchiCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-10-19 18:43:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states and 98 transitions. [2020-10-19 18:43:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-10-19 18:43:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-19 18:43:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-19 18:43:17,788 INFO L714 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-19 18:43:17,788 INFO L594 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-19 18:43:17,788 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 18:43:17,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 84 transitions. [2020-10-19 18:43:17,789 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-19 18:43:17,789 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:17,790 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:17,790 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1, 1] [2020-10-19 18:43:17,790 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 18:43:17,791 INFO L794 eck$LassoCheckResult]: Stem: 2386#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2387#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2408#L12 assume !(main_~i~0 >= 10); 2409#L12-2 assume !(main_~i~0 <= 0); 2448#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2446#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2445#L12 assume !(main_~i~0 >= 10); 2444#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2443#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2441#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2414#L12 assume !(main_~i~0 >= 10); 2415#L12-2 [2020-10-19 18:43:17,791 INFO L796 eck$LassoCheckResult]: Loop: 2415#L12-2 assume !(main_~i~0 <= 0); 2429#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2428#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2426#L12 assume !(main_~i~0 >= 10); 2415#L12-2 [2020-10-19 18:43:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash 52759419, now seen corresponding path program 2 times [2020-10-19 18:43:17,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:17,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871905114] [2020-10-19 18:43:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:17,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:17,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:17,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1573482, now seen corresponding path program 2 times [2020-10-19 18:43:17,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:17,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476414224] [2020-10-19 18:43:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:17,809 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:17,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:17,813 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:17,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1971928860, now seen corresponding path program 3 times [2020-10-19 18:43:17,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:17,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674702148] [2020-10-19 18:43:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:17,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:17,826 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:17,828 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:17,854 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:17,854 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:17,854 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:17,854 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:17,855 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:17,855 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,855 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:17,855 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:17,856 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration10_Loop [2020-10-19 18:43:17,856 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:17,856 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:17,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:17,917 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:17,918 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,922 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:17,926 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:17,926 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,949 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:17,951 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:17,952 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_13=1} Honda state: {v_rep~unnamed0~0~true_13=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:17,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:17,977 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:18,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:18,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:18,030 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:18,031 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:18,032 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:18,032 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:18,032 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:18,032 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:18,032 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:18,032 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:18,032 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:18,032 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration10_Loop [2020-10-19 18:43:18,032 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:18,033 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:18,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:18,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:18,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:18,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:18,092 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:18,093 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:18,097 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:18,098 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:18,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:18,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:18,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:18,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:18,099 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:18,100 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:18,101 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 58 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:18,123 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:18,124 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:18,124 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:18,125 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:18,125 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:18,125 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:18,126 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:18,126 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:18,131 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:18,134 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:18,134 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:18,138 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:18,138 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:18,138 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:18,139 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 17 Supporting invariants [] [2020-10-19 18:43:18,161 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,207 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 [2020-10-19 18:43:18,207 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-10-19 18:43:18,255 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 108 states and 129 transitions. Complement of second has 7 states. [2020-10-19 18:43:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2020-10-19 18:43:18,256 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 11 letters. Loop has 4 letters. [2020-10-19 18:43:18,256 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:18,256 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:43:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,295 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 18:43:18,295 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-10-19 18:43:18,342 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 108 states and 129 transitions. Complement of second has 7 states. [2020-10-19 18:43:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2020-10-19 18:43:18,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 11 letters. Loop has 4 letters. [2020-10-19 18:43:18,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:18,344 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:43:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,391 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 2 loop predicates [2020-10-19 18:43:18,391 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-10-19 18:43:18,443 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 123 states and 147 transitions. Complement of second has 8 states. [2020-10-19 18:43:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:43:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 21 transitions. [2020-10-19 18:43:18,446 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 11 letters. Loop has 4 letters. [2020-10-19 18:43:18,446 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:18,447 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 15 letters. Loop has 4 letters. [2020-10-19 18:43:18,447 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:18,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-10-19 18:43:18,448 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:18,448 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 147 transitions. [2020-10-19 18:43:18,450 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 26 [2020-10-19 18:43:18,450 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 88 states and 106 transitions. [2020-10-19 18:43:18,451 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2020-10-19 18:43:18,451 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2020-10-19 18:43:18,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 106 transitions. [2020-10-19 18:43:18,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:18,451 INFO L691 BuchiCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-10-19 18:43:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states and 106 transitions. [2020-10-19 18:43:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2020-10-19 18:43:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-19 18:43:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-19 18:43:18,454 INFO L714 BuchiCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-19 18:43:18,454 INFO L594 BuchiCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-19 18:43:18,454 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-19 18:43:18,454 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 69 transitions. [2020-10-19 18:43:18,455 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-19 18:43:18,455 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:18,455 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:18,456 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 1, 1, 1, 1] [2020-10-19 18:43:18,457 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 1, 1] [2020-10-19 18:43:18,457 INFO L794 eck$LassoCheckResult]: Stem: 2971#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2972#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3010#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3012#L12-2 assume !(main_~i~0 <= 0); 3011#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3009#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3008#L12 assume !(main_~i~0 >= 10); 3007#L12-2 assume !(main_~i~0 <= 0); 3005#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3003#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3001#L12 assume !(main_~i~0 >= 10); 2988#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2994#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2997#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2995#L12 assume !(main_~i~0 >= 10); 2993#L12-2 assume !(main_~i~0 <= 0); 2981#L15-1 [2020-10-19 18:43:18,457 INFO L796 eck$LassoCheckResult]: Loop: 2981#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2973#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2974#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 2977#L12-2 assume !(main_~i~0 <= 0); 2979#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2980#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3021#L12 assume !(main_~i~0 >= 10); 3006#L12-2 assume !(main_~i~0 <= 0); 2999#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3002#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3000#L12 assume !(main_~i~0 >= 10); 2998#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2994#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2997#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2995#L12 assume !(main_~i~0 >= 10); 2993#L12-2 assume !(main_~i~0 <= 0); 2981#L15-1 [2020-10-19 18:43:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash -120270543, now seen corresponding path program 1 times [2020-10-19 18:43:18,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:18,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148208834] [2020-10-19 18:43:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148208834] [2020-10-19 18:43:18,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540287763] [2020-10-19 18:43:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:18,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-19 18:43:18,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515916798] [2020-10-19 18:43:18,528 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash 511811097, now seen corresponding path program 2 times [2020-10-19 18:43:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:18,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754791649] [2020-10-19 18:43:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754791649] [2020-10-19 18:43:18,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440661325] [2020-10-19 18:43:18,557 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:18,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:43:18,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:18,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:18,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-19 18:43:18,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793396392] [2020-10-19 18:43:18,645 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:18,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:43:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:43:18,646 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. cyclomatic complexity: 20 Second operand 5 states. [2020-10-19 18:43:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:18,760 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-10-19 18:43:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:43:18,761 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 100 transitions. [2020-10-19 18:43:18,762 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-19 18:43:18,763 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 79 states and 97 transitions. [2020-10-19 18:43:18,764 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2020-10-19 18:43:18,764 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2020-10-19 18:43:18,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 97 transitions. [2020-10-19 18:43:18,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:18,764 INFO L691 BuchiCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-10-19 18:43:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states and 97 transitions. [2020-10-19 18:43:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-10-19 18:43:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-19 18:43:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-10-19 18:43:18,766 INFO L714 BuchiCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-19 18:43:18,767 INFO L594 BuchiCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-19 18:43:18,767 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-10-19 18:43:18,767 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 66 states and 82 transitions. [2020-10-19 18:43:18,767 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-19 18:43:18,768 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:18,768 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:18,769 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 3, 1, 1, 1, 1] [2020-10-19 18:43:18,769 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 4, 3, 2, 1, 1] [2020-10-19 18:43:18,769 INFO L794 eck$LassoCheckResult]: Stem: 3208#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3209#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3213#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3267#L12-2 assume !(main_~i~0 <= 0); 3266#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3265#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3214#L12 assume !(main_~i~0 >= 10); 3215#L12-2 assume !(main_~i~0 <= 0); 3269#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3268#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3216#L12 assume !(main_~i~0 >= 10); 3217#L12-2 assume !(main_~i~0 <= 0); 3258#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3255#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3256#L12 assume !(main_~i~0 >= 10); 3235#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3227#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3228#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3223#L12 assume !(main_~i~0 >= 10); 3224#L12-2 assume !(main_~i~0 <= 0); 3218#L15-1 [2020-10-19 18:43:18,769 INFO L796 eck$LassoCheckResult]: Loop: 3218#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3219#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3264#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3204#L12-2 assume !(main_~i~0 <= 0); 3205#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3210#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3211#L12 assume !(main_~i~0 >= 10); 3263#L12-2 assume !(main_~i~0 <= 0); 3262#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3261#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3260#L12 assume !(main_~i~0 >= 10); 3259#L12-2 assume !(main_~i~0 <= 0); 3257#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3254#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3230#L12 assume !(main_~i~0 >= 10); 3231#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3227#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3228#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3223#L12 assume !(main_~i~0 >= 10); 3224#L12-2 assume !(main_~i~0 <= 0); 3218#L15-1 [2020-10-19 18:43:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -353280474, now seen corresponding path program 2 times [2020-10-19 18:43:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:18,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811559497] [2020-10-19 18:43:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811559497] [2020-10-19 18:43:18,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018195549] [2020-10-19 18:43:18,801 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:18,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:43:18,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:18,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-19 18:43:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986357560] [2020-10-19 18:43:18,845 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1575127282, now seen corresponding path program 3 times [2020-10-19 18:43:18,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:18,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20400992] [2020-10-19 18:43:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20400992] [2020-10-19 18:43:18,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977422292] [2020-10-19 18:43:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:18,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 18:43:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:43:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:18,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:18,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-19 18:43:18,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504540866] [2020-10-19 18:43:18,920 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:18,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:43:18,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:43:18,920 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. cyclomatic complexity: 22 Second operand 6 states. [2020-10-19 18:43:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:18,977 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-19 18:43:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:43:18,977 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 119 transitions. [2020-10-19 18:43:18,979 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2020-10-19 18:43:18,980 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 95 states and 116 transitions. [2020-10-19 18:43:18,980 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-10-19 18:43:18,980 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-10-19 18:43:18,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 116 transitions. [2020-10-19 18:43:18,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:18,981 INFO L691 BuchiCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-10-19 18:43:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 116 transitions. [2020-10-19 18:43:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-10-19 18:43:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:43:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-19 18:43:18,983 INFO L714 BuchiCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-19 18:43:18,983 INFO L594 BuchiCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-19 18:43:18,984 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-10-19 18:43:18,984 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 78 states and 96 transitions. [2020-10-19 18:43:18,985 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2020-10-19 18:43:18,985 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:18,985 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:18,986 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 1, 1, 1, 1] [2020-10-19 18:43:18,986 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 4, 2, 1, 1] [2020-10-19 18:43:18,987 INFO L794 eck$LassoCheckResult]: Stem: 3498#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3499#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3503#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3567#L12-2 assume !(main_~i~0 <= 0); 3566#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3565#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3504#L12 assume !(main_~i~0 >= 10); 3505#L12-2 assume !(main_~i~0 <= 0); 3569#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3568#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3506#L12 assume !(main_~i~0 >= 10); 3507#L12-2 assume !(main_~i~0 <= 0); 3571#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3570#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3545#L12 assume !(main_~i~0 >= 10); 3564#L12-2 assume !(main_~i~0 <= 0); 3548#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3544#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3546#L12 assume !(main_~i~0 >= 10); 3523#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3517#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3518#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3513#L12 assume !(main_~i~0 >= 10); 3514#L12-2 assume !(main_~i~0 <= 0); 3509#L15-1 [2020-10-19 18:43:18,987 INFO L796 eck$LassoCheckResult]: Loop: 3509#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3500#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3501#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3494#L12-2 assume !(main_~i~0 <= 0); 3495#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3508#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3563#L12 assume !(main_~i~0 >= 10); 3562#L12-2 assume !(main_~i~0 <= 0); 3561#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3560#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3559#L12 assume !(main_~i~0 >= 10); 3558#L12-2 assume !(main_~i~0 <= 0); 3557#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3556#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3555#L12 assume !(main_~i~0 >= 10); 3554#L12-2 assume !(main_~i~0 <= 0); 3547#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3543#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3524#L12 assume !(main_~i~0 >= 10); 3525#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3517#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3518#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3513#L12 assume !(main_~i~0 >= 10); 3514#L12-2 assume !(main_~i~0 <= 0); 3509#L15-1 [2020-10-19 18:43:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:18,987 INFO L82 PathProgramCache]: Analyzing trace with hash 828663963, now seen corresponding path program 3 times [2020-10-19 18:43:18,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:18,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549617953] [2020-10-19 18:43:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549617953] [2020-10-19 18:43:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038587862] [2020-10-19 18:43:19,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-19 18:43:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-19 18:43:19,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601327599] [2020-10-19 18:43:19,071 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash -779498109, now seen corresponding path program 4 times [2020-10-19 18:43:19,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891267768] [2020-10-19 18:43:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891267768] [2020-10-19 18:43:19,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736531784] [2020-10-19 18:43:19,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:19,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:43:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-19 18:43:19,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406387547] [2020-10-19 18:43:19,161 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:19,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:19,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:43:19,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:43:19,161 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. cyclomatic complexity: 24 Second operand 7 states. [2020-10-19 18:43:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:19,230 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2020-10-19 18:43:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:43:19,231 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 113 states and 138 transitions. [2020-10-19 18:43:19,232 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2020-10-19 18:43:19,233 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 113 states to 111 states and 135 transitions. [2020-10-19 18:43:19,233 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-10-19 18:43:19,233 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2020-10-19 18:43:19,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 135 transitions. [2020-10-19 18:43:19,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:19,234 INFO L691 BuchiCegarLoop]: Abstraction has 111 states and 135 transitions. [2020-10-19 18:43:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states and 135 transitions. [2020-10-19 18:43:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2020-10-19 18:43:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-19 18:43:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2020-10-19 18:43:19,236 INFO L714 BuchiCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-10-19 18:43:19,237 INFO L594 BuchiCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-10-19 18:43:19,237 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-10-19 18:43:19,237 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 110 transitions. [2020-10-19 18:43:19,238 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 28 [2020-10-19 18:43:19,238 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:19,238 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:19,239 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 6, 5, 1, 1, 1, 1] [2020-10-19 18:43:19,239 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 6, 6, 5, 2, 1, 1] [2020-10-19 18:43:19,240 INFO L794 eck$LassoCheckResult]: Stem: 3842#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3843#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3847#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3919#L12-2 assume !(main_~i~0 <= 0); 3918#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3917#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3848#L12 assume !(main_~i~0 >= 10); 3849#L12-2 assume !(main_~i~0 <= 0); 3926#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3924#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3850#L12 assume !(main_~i~0 >= 10); 3851#L12-2 assume !(main_~i~0 <= 0); 3927#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3925#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3923#L12 assume !(main_~i~0 >= 10); 3922#L12-2 assume !(main_~i~0 <= 0); 3921#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3920#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3892#L12 assume !(main_~i~0 >= 10); 3902#L12-2 assume !(main_~i~0 <= 0); 3895#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3891#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3893#L12 assume !(main_~i~0 >= 10); 3869#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3861#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3862#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3857#L12 assume !(main_~i~0 >= 10); 3858#L12-2 assume !(main_~i~0 <= 0); 3853#L15-1 [2020-10-19 18:43:19,240 INFO L796 eck$LassoCheckResult]: Loop: 3853#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3844#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3845#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3838#L12-2 assume !(main_~i~0 <= 0); 3839#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3852#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3916#L12 assume !(main_~i~0 >= 10); 3915#L12-2 assume !(main_~i~0 <= 0); 3914#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3913#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3912#L12 assume !(main_~i~0 >= 10); 3911#L12-2 assume !(main_~i~0 <= 0); 3910#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3909#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3908#L12 assume !(main_~i~0 >= 10); 3907#L12-2 assume !(main_~i~0 <= 0); 3906#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3905#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3904#L12 assume !(main_~i~0 >= 10); 3903#L12-2 assume !(main_~i~0 <= 0); 3896#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3894#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3864#L12 assume !(main_~i~0 >= 10); 3865#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3861#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3862#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3857#L12 assume !(main_~i~0 >= 10); 3858#L12-2 assume !(main_~i~0 <= 0); 3853#L15-1 [2020-10-19 18:43:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1716309872, now seen corresponding path program 4 times [2020-10-19 18:43:19,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662868486] [2020-10-19 18:43:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662868486] [2020-10-19 18:43:19,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214528926] [2020-10-19 18:43:19,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:19,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:43:19,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-19 18:43:19,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5404521] [2020-10-19 18:43:19,342 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash 759947640, now seen corresponding path program 5 times [2020-10-19 18:43:19,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351185806] [2020-10-19 18:43:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351185806] [2020-10-19 18:43:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873705175] [2020-10-19 18:43:19,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:19,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-19 18:43:19,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-19 18:43:19,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567132715] [2020-10-19 18:43:19,437 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:19,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:43:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:43:19,438 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. cyclomatic complexity: 26 Second operand 8 states. [2020-10-19 18:43:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:19,514 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2020-10-19 18:43:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:43:19,515 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 157 transitions. [2020-10-19 18:43:19,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 33 [2020-10-19 18:43:19,517 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 154 transitions. [2020-10-19 18:43:19,517 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2020-10-19 18:43:19,517 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2020-10-19 18:43:19,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 154 transitions. [2020-10-19 18:43:19,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:19,518 INFO L691 BuchiCegarLoop]: Abstraction has 127 states and 154 transitions. [2020-10-19 18:43:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 154 transitions. [2020-10-19 18:43:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2020-10-19 18:43:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-19 18:43:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-10-19 18:43:19,521 INFO L714 BuchiCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-19 18:43:19,521 INFO L594 BuchiCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-19 18:43:19,521 INFO L427 BuchiCegarLoop]: ======== Iteration 15============ [2020-10-19 18:43:19,521 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 124 transitions. [2020-10-19 18:43:19,522 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 32 [2020-10-19 18:43:19,522 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:19,522 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:19,524 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 7, 6, 1, 1, 1, 1] [2020-10-19 18:43:19,524 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 7, 6, 2, 1, 1] [2020-10-19 18:43:19,525 INFO L794 eck$LassoCheckResult]: Stem: 4240#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4241#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4245#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4325#L12-2 assume !(main_~i~0 <= 0); 4324#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4323#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4246#L12 assume !(main_~i~0 >= 10); 4247#L12-2 assume !(main_~i~0 <= 0); 4336#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4334#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4248#L12 assume !(main_~i~0 >= 10); 4249#L12-2 assume !(main_~i~0 <= 0); 4337#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4335#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4333#L12 assume !(main_~i~0 >= 10); 4332#L12-2 assume !(main_~i~0 <= 0); 4331#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4330#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4329#L12 assume !(main_~i~0 >= 10); 4328#L12-2 assume !(main_~i~0 <= 0); 4327#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4326#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4295#L12 assume !(main_~i~0 >= 10); 4322#L12-2 assume !(main_~i~0 <= 0); 4298#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4294#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4296#L12 assume !(main_~i~0 >= 10); 4267#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4259#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4260#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4255#L12 assume !(main_~i~0 >= 10); 4256#L12-2 assume !(main_~i~0 <= 0); 4251#L15-1 [2020-10-19 18:43:19,525 INFO L796 eck$LassoCheckResult]: Loop: 4251#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4242#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4243#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4236#L12-2 assume !(main_~i~0 <= 0); 4237#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4250#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4321#L12 assume !(main_~i~0 >= 10); 4320#L12-2 assume !(main_~i~0 <= 0); 4319#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4318#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4317#L12 assume !(main_~i~0 >= 10); 4316#L12-2 assume !(main_~i~0 <= 0); 4315#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4314#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4313#L12 assume !(main_~i~0 >= 10); 4312#L12-2 assume !(main_~i~0 <= 0); 4311#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4310#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4309#L12 assume !(main_~i~0 >= 10); 4308#L12-2 assume !(main_~i~0 <= 0); 4307#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4306#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4305#L12 assume !(main_~i~0 >= 10); 4304#L12-2 assume !(main_~i~0 <= 0); 4297#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4293#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4262#L12 assume !(main_~i~0 >= 10); 4263#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4259#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4260#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4255#L12 assume !(main_~i~0 >= 10); 4256#L12-2 assume !(main_~i~0 <= 0); 4251#L15-1 [2020-10-19 18:43:19,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash 750974469, now seen corresponding path program 5 times [2020-10-19 18:43:19,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967497958] [2020-10-19 18:43:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967497958] [2020-10-19 18:43:19,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516891192] [2020-10-19 18:43:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-19 18:43:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-19 18:43:19,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840633077] [2020-10-19 18:43:19,621 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash -246877459, now seen corresponding path program 6 times [2020-10-19 18:43:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369295220] [2020-10-19 18:43:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369295220] [2020-10-19 18:43:19,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054570085] [2020-10-19 18:43:19,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-19 18:43:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-19 18:43:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579753706] [2020-10-19 18:43:19,729 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:43:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:43:19,730 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. cyclomatic complexity: 28 Second operand 9 states. [2020-10-19 18:43:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:19,800 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2020-10-19 18:43:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:43:19,801 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 145 states and 176 transitions. [2020-10-19 18:43:19,802 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 37 [2020-10-19 18:43:19,803 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 145 states to 143 states and 173 transitions. [2020-10-19 18:43:19,803 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2020-10-19 18:43:19,804 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2020-10-19 18:43:19,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 173 transitions. [2020-10-19 18:43:19,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:19,804 INFO L691 BuchiCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-10-19 18:43:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states and 173 transitions. [2020-10-19 18:43:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2020-10-19 18:43:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-19 18:43:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-10-19 18:43:19,808 INFO L714 BuchiCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-10-19 18:43:19,808 INFO L594 BuchiCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-10-19 18:43:19,808 INFO L427 BuchiCegarLoop]: ======== Iteration 16============ [2020-10-19 18:43:19,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 138 transitions. [2020-10-19 18:43:19,809 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2020-10-19 18:43:19,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:19,809 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:19,810 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 8, 7, 1, 1, 1, 1] [2020-10-19 18:43:19,811 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 8, 8, 7, 2, 1, 1] [2020-10-19 18:43:19,811 INFO L794 eck$LassoCheckResult]: Stem: 4692#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4693#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4697#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4785#L12-2 assume !(main_~i~0 <= 0); 4784#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4783#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4698#L12 assume !(main_~i~0 >= 10); 4699#L12-2 assume !(main_~i~0 <= 0); 4800#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4798#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4700#L12 assume !(main_~i~0 >= 10); 4701#L12-2 assume !(main_~i~0 <= 0); 4801#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4799#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4797#L12 assume !(main_~i~0 >= 10); 4796#L12-2 assume !(main_~i~0 <= 0); 4795#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4794#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4793#L12 assume !(main_~i~0 >= 10); 4792#L12-2 assume !(main_~i~0 <= 0); 4791#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4790#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4789#L12 assume !(main_~i~0 >= 10); 4788#L12-2 assume !(main_~i~0 <= 0); 4787#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4786#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4750#L12 assume !(main_~i~0 >= 10); 4760#L12-2 assume !(main_~i~0 <= 0); 4753#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4749#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4751#L12 assume !(main_~i~0 >= 10); 4719#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4711#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4712#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4707#L12 assume !(main_~i~0 >= 10); 4708#L12-2 assume !(main_~i~0 <= 0); 4703#L15-1 [2020-10-19 18:43:19,811 INFO L796 eck$LassoCheckResult]: Loop: 4703#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4694#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4695#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4688#L12-2 assume !(main_~i~0 <= 0); 4689#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4702#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4782#L12 assume !(main_~i~0 >= 10); 4781#L12-2 assume !(main_~i~0 <= 0); 4780#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4779#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4778#L12 assume !(main_~i~0 >= 10); 4777#L12-2 assume !(main_~i~0 <= 0); 4776#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4775#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4774#L12 assume !(main_~i~0 >= 10); 4773#L12-2 assume !(main_~i~0 <= 0); 4772#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4771#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4770#L12 assume !(main_~i~0 >= 10); 4769#L12-2 assume !(main_~i~0 <= 0); 4768#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4767#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4766#L12 assume !(main_~i~0 >= 10); 4765#L12-2 assume !(main_~i~0 <= 0); 4764#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4763#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4762#L12 assume !(main_~i~0 >= 10); 4761#L12-2 assume !(main_~i~0 <= 0); 4754#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4752#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4714#L12 assume !(main_~i~0 >= 10); 4715#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4711#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4712#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4707#L12 assume !(main_~i~0 >= 10); 4708#L12-2 assume !(main_~i~0 <= 0); 4703#L15-1 [2020-10-19 18:43:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2128148730, now seen corresponding path program 6 times [2020-10-19 18:43:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218552819] [2020-10-19 18:43:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218552819] [2020-10-19 18:43:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232768988] [2020-10-19 18:43:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:19,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-19 18:43:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:43:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:19,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:19,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-19 18:43:19,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178312748] [2020-10-19 18:43:19,940 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1690714594, now seen corresponding path program 7 times [2020-10-19 18:43:19,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:19,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338263485] [2020-10-19 18:43:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 53 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338263485] [2020-10-19 18:43:20,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964074712] [2020-10-19 18:43:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:43:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 53 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:20,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-19 18:43:20,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401067637] [2020-10-19 18:43:20,052 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:20,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:43:20,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:43:20,053 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. cyclomatic complexity: 30 Second operand 10 states. [2020-10-19 18:43:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:20,159 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2020-10-19 18:43:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:43:20,160 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 161 states and 195 transitions. [2020-10-19 18:43:20,162 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 41 [2020-10-19 18:43:20,163 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 161 states to 159 states and 192 transitions. [2020-10-19 18:43:20,164 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2020-10-19 18:43:20,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-10-19 18:43:20,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 159 states and 192 transitions. [2020-10-19 18:43:20,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:20,164 INFO L691 BuchiCegarLoop]: Abstraction has 159 states and 192 transitions. [2020-10-19 18:43:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states and 192 transitions. [2020-10-19 18:43:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2020-10-19 18:43:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-19 18:43:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2020-10-19 18:43:20,168 INFO L714 BuchiCegarLoop]: Abstraction has 126 states and 152 transitions. [2020-10-19 18:43:20,168 INFO L594 BuchiCegarLoop]: Abstraction has 126 states and 152 transitions. [2020-10-19 18:43:20,168 INFO L427 BuchiCegarLoop]: ======== Iteration 17============ [2020-10-19 18:43:20,168 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 126 states and 152 transitions. [2020-10-19 18:43:20,169 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 40 [2020-10-19 18:43:20,169 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:20,169 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:20,170 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 9, 8, 1, 1, 1, 1] [2020-10-19 18:43:20,170 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 9, 8, 2, 1, 1] [2020-10-19 18:43:20,171 INFO L794 eck$LassoCheckResult]: Stem: 5198#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 5199#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5203#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5299#L12-2 assume !(main_~i~0 <= 0); 5298#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5297#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5204#L12 assume !(main_~i~0 >= 10); 5205#L12-2 assume !(main_~i~0 <= 0); 5318#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5316#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5206#L12 assume !(main_~i~0 >= 10); 5207#L12-2 assume !(main_~i~0 <= 0); 5319#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5317#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5315#L12 assume !(main_~i~0 >= 10); 5314#L12-2 assume !(main_~i~0 <= 0); 5313#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5312#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5311#L12 assume !(main_~i~0 >= 10); 5310#L12-2 assume !(main_~i~0 <= 0); 5309#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5308#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5307#L12 assume !(main_~i~0 >= 10); 5306#L12-2 assume !(main_~i~0 <= 0); 5305#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5304#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5303#L12 assume !(main_~i~0 >= 10); 5302#L12-2 assume !(main_~i~0 <= 0); 5301#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5300#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5260#L12 assume !(main_~i~0 >= 10); 5270#L12-2 assume !(main_~i~0 <= 0); 5263#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5259#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5261#L12 assume !(main_~i~0 >= 10); 5225#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5217#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5218#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5213#L12 assume !(main_~i~0 >= 10); 5214#L12-2 assume !(main_~i~0 <= 0); 5209#L15-1 [2020-10-19 18:43:20,171 INFO L796 eck$LassoCheckResult]: Loop: 5209#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5200#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5201#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5194#L12-2 assume !(main_~i~0 <= 0); 5195#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5208#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5296#L12 assume !(main_~i~0 >= 10); 5295#L12-2 assume !(main_~i~0 <= 0); 5294#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5293#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5292#L12 assume !(main_~i~0 >= 10); 5291#L12-2 assume !(main_~i~0 <= 0); 5290#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5289#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5288#L12 assume !(main_~i~0 >= 10); 5287#L12-2 assume !(main_~i~0 <= 0); 5286#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5285#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5284#L12 assume !(main_~i~0 >= 10); 5283#L12-2 assume !(main_~i~0 <= 0); 5282#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5281#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5280#L12 assume !(main_~i~0 >= 10); 5279#L12-2 assume !(main_~i~0 <= 0); 5278#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5277#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5276#L12 assume !(main_~i~0 >= 10); 5275#L12-2 assume !(main_~i~0 <= 0); 5274#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5273#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5272#L12 assume !(main_~i~0 >= 10); 5271#L12-2 assume !(main_~i~0 <= 0); 5264#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5262#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5220#L12 assume !(main_~i~0 >= 10); 5221#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5217#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5218#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5213#L12 assume !(main_~i~0 >= 10); 5214#L12-2 assume !(main_~i~0 <= 0); 5209#L15-1 [2020-10-19 18:43:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,172 INFO L82 PathProgramCache]: Analyzing trace with hash -6653585, now seen corresponding path program 7 times [2020-10-19 18:43:20,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696186359] [2020-10-19 18:43:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696186359] [2020-10-19 18:43:20,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095536609] [2020-10-19 18:43:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-19 18:43:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:43:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:20,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-19 18:43:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144191287] [2020-10-19 18:43:20,305 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash 711528023, now seen corresponding path program 8 times [2020-10-19 18:43:20,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428099314] [2020-10-19 18:43:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428099314] [2020-10-19 18:43:20,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034687764] [2020-10-19 18:43:20,383 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:20,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:43:20,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:20,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:43:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:20,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-19 18:43:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008023554] [2020-10-19 18:43:20,425 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:43:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:43:20,426 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. cyclomatic complexity: 32 Second operand 11 states. [2020-10-19 18:43:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:20,495 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2020-10-19 18:43:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:43:20,496 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 177 states and 214 transitions. [2020-10-19 18:43:20,497 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 45 [2020-10-19 18:43:20,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 177 states to 175 states and 211 transitions. [2020-10-19 18:43:20,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2020-10-19 18:43:20,499 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2020-10-19 18:43:20,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 211 transitions. [2020-10-19 18:43:20,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:20,500 INFO L691 BuchiCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-10-19 18:43:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states and 211 transitions. [2020-10-19 18:43:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-10-19 18:43:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-19 18:43:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2020-10-19 18:43:20,504 INFO L714 BuchiCegarLoop]: Abstraction has 138 states and 166 transitions. [2020-10-19 18:43:20,505 INFO L594 BuchiCegarLoop]: Abstraction has 138 states and 166 transitions. [2020-10-19 18:43:20,505 INFO L427 BuchiCegarLoop]: ======== Iteration 18============ [2020-10-19 18:43:20,505 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 138 states and 166 transitions. [2020-10-19 18:43:20,506 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 44 [2020-10-19 18:43:20,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:20,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:20,507 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1, 1] [2020-10-19 18:43:20,507 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [11, 10, 10, 9, 2, 1, 1] [2020-10-19 18:43:20,508 INFO L794 eck$LassoCheckResult]: Stem: 5758#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 5759#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5763#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5867#L12-2 assume !(main_~i~0 <= 0); 5866#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5865#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5764#L12 assume !(main_~i~0 >= 10); 5765#L12-2 assume !(main_~i~0 <= 0); 5890#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5888#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5766#L12 assume !(main_~i~0 >= 10); 5767#L12-2 assume !(main_~i~0 <= 0); 5891#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5889#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5887#L12 assume !(main_~i~0 >= 10); 5886#L12-2 assume !(main_~i~0 <= 0); 5885#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5884#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5883#L12 assume !(main_~i~0 >= 10); 5882#L12-2 assume !(main_~i~0 <= 0); 5881#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5880#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5879#L12 assume !(main_~i~0 >= 10); 5878#L12-2 assume !(main_~i~0 <= 0); 5877#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5876#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5875#L12 assume !(main_~i~0 >= 10); 5874#L12-2 assume !(main_~i~0 <= 0); 5873#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5872#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5871#L12 assume !(main_~i~0 >= 10); 5870#L12-2 assume !(main_~i~0 <= 0); 5869#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5868#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5825#L12 assume !(main_~i~0 >= 10); 5864#L12-2 assume !(main_~i~0 <= 0); 5828#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5824#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5826#L12 assume !(main_~i~0 >= 10); 5783#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5777#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5778#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5773#L12 assume !(main_~i~0 >= 10); 5774#L12-2 assume !(main_~i~0 <= 0); 5769#L15-1 [2020-10-19 18:43:20,508 INFO L796 eck$LassoCheckResult]: Loop: 5769#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5760#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5761#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5754#L12-2 assume !(main_~i~0 <= 0); 5755#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5768#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5863#L12 assume !(main_~i~0 >= 10); 5862#L12-2 assume !(main_~i~0 <= 0); 5861#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5860#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5859#L12 assume !(main_~i~0 >= 10); 5858#L12-2 assume !(main_~i~0 <= 0); 5857#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5856#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5855#L12 assume !(main_~i~0 >= 10); 5854#L12-2 assume !(main_~i~0 <= 0); 5853#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5852#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5851#L12 assume !(main_~i~0 >= 10); 5850#L12-2 assume !(main_~i~0 <= 0); 5849#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5848#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5847#L12 assume !(main_~i~0 >= 10); 5846#L12-2 assume !(main_~i~0 <= 0); 5845#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5844#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5843#L12 assume !(main_~i~0 >= 10); 5842#L12-2 assume !(main_~i~0 <= 0); 5841#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5840#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5839#L12 assume !(main_~i~0 >= 10); 5838#L12-2 assume !(main_~i~0 <= 0); 5837#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5836#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5835#L12 assume !(main_~i~0 >= 10); 5834#L12-2 assume !(main_~i~0 <= 0); 5827#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5823#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5784#L12 assume !(main_~i~0 >= 10); 5785#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5777#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5778#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5773#L12 assume !(main_~i~0 >= 10); 5774#L12-2 assume !(main_~i~0 <= 0); 5769#L15-1 [2020-10-19 18:43:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1242347364, now seen corresponding path program 8 times [2020-10-19 18:43:20,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94196365] [2020-10-19 18:43:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94196365] [2020-10-19 18:43:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295872896] [2020-10-19 18:43:20,595 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:20,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:43:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:43:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:20,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-19 18:43:20,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612655434] [2020-10-19 18:43:20,654 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 18:43:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1875470260, now seen corresponding path program 9 times [2020-10-19 18:43:20,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497120329] [2020-10-19 18:43:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 67 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497120329] [2020-10-19 18:43:20,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365503097] [2020-10-19 18:43:20,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:20,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-19 18:43:20,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:43:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 67 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:43:20,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:20,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-19 18:43:20,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264002646] [2020-10-19 18:43:20,795 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:43:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:43:20,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:43:20,796 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. cyclomatic complexity: 34 Second operand 12 states. [2020-10-19 18:43:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:20,939 INFO L93 Difference]: Finished difference Result 307 states and 361 transitions. [2020-10-19 18:43:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:43:20,940 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 307 states and 361 transitions. [2020-10-19 18:43:20,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 104 [2020-10-19 18:43:20,945 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 307 states to 299 states and 352 transitions. [2020-10-19 18:43:20,945 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 104 [2020-10-19 18:43:20,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 176 [2020-10-19 18:43:20,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 299 states and 352 transitions. [2020-10-19 18:43:20,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:20,946 INFO L691 BuchiCegarLoop]: Abstraction has 299 states and 352 transitions. [2020-10-19 18:43:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states and 352 transitions. [2020-10-19 18:43:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 214. [2020-10-19 18:43:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 258 transitions. [2020-10-19 18:43:20,952 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 258 transitions. [2020-10-19 18:43:20,952 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 258 transitions. [2020-10-19 18:43:20,953 INFO L427 BuchiCegarLoop]: ======== Iteration 19============ [2020-10-19 18:43:20,953 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 258 transitions. [2020-10-19 18:43:20,954 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:20,955 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:20,955 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:20,956 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:20,956 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [12, 11, 11, 10, 2, 1, 1] [2020-10-19 18:43:20,957 INFO L794 eck$LassoCheckResult]: Stem: 6486#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 6487#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6491#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 6599#L12-2 assume !(main_~i~0 <= 0); 6597#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6595#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6492#L12 assume !(main_~i~0 >= 10); 6493#L12-2 assume !(main_~i~0 <= 0); 6639#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6636#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6494#L12 assume !(main_~i~0 >= 10); 6495#L12-2 assume !(main_~i~0 <= 0); 6625#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6624#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6623#L12 assume !(main_~i~0 >= 10); 6622#L12-2 assume !(main_~i~0 <= 0); 6621#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6620#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6619#L12 assume !(main_~i~0 >= 10); 6618#L12-2 assume !(main_~i~0 <= 0); 6617#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6616#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6615#L12 assume !(main_~i~0 >= 10); 6614#L12-2 assume !(main_~i~0 <= 0); 6613#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6612#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6611#L12 assume !(main_~i~0 >= 10); 6610#L12-2 assume !(main_~i~0 <= 0); 6609#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6608#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6607#L12 assume !(main_~i~0 >= 10); 6606#L12-2 assume !(main_~i~0 <= 0); 6605#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6604#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6603#L12 assume !(main_~i~0 >= 10); 6602#L12-2 assume !(main_~i~0 <= 0); 6601#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6600#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6594#L12 assume !(main_~i~0 >= 10); 6598#L12-2 assume !(main_~i~0 <= 0); 6596#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6593#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6547#L12 assume !(main_~i~0 >= 10); 6548#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 6628#L15-1 [2020-10-19 18:43:20,957 INFO L796 eck$LassoCheckResult]: Loop: 6628#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 6690#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6688#L12 assume !(main_~i~0 >= 10); 6629#L12-2 assume !(main_~i~0 <= 0); 6554#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 6552#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6545#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 6546#L12-2 assume !(main_~i~0 <= 0); 6695#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6488#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6489#L12 assume !(main_~i~0 >= 10); 6482#L12-2 assume !(main_~i~0 <= 0); 6483#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6496#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6694#L12 assume !(main_~i~0 >= 10); 6693#L12-2 assume !(main_~i~0 <= 0); 6692#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6691#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6689#L12 assume !(main_~i~0 >= 10); 6687#L12-2 assume !(main_~i~0 <= 0); 6686#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6684#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6682#L12 assume !(main_~i~0 >= 10); 6680#L12-2 assume !(main_~i~0 <= 0); 6678#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6676#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6674#L12 assume !(main_~i~0 >= 10); 6672#L12-2 assume !(main_~i~0 <= 0); 6670#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6668#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6666#L12 assume !(main_~i~0 >= 10); 6664#L12-2 assume !(main_~i~0 <= 0); 6662#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6660#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6658#L12 assume !(main_~i~0 >= 10); 6656#L12-2 assume !(main_~i~0 <= 0); 6654#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6652#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6650#L12 assume !(main_~i~0 >= 10); 6648#L12-2 assume !(main_~i~0 <= 0); 6646#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6644#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6642#L12 assume !(main_~i~0 >= 10); 6640#L12-2 assume !(main_~i~0 <= 0); 6637#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6634#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6631#L12 assume !(main_~i~0 >= 10); 6632#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 6628#L15-1 [2020-10-19 18:43:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 2 times [2020-10-19 18:43:20,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685606093] [2020-10-19 18:43:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:20,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:20,971 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:20,974 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1107487295, now seen corresponding path program 10 times [2020-10-19 18:43:20,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259562095] [2020-10-19 18:43:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:20,983 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:20,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:20,992 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash -429277470, now seen corresponding path program 9 times [2020-10-19 18:43:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:20,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305275535] [2020-10-19 18:43:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 587 proven. 3 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:21,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305275535] [2020-10-19 18:43:21,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555557083] [2020-10-19 18:43:21,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:21,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-10-19 18:43:21,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:43:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 587 proven. 3 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:21,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:21,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-19 18:43:21,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982785178] [2020-10-19 18:43:21,386 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 52 [2020-10-19 18:43:21,405 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:21,406 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:21,406 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:21,406 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:21,406 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:21,406 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,406 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:21,407 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:21,407 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration19_Loop [2020-10-19 18:43:21,407 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:21,407 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:21,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,492 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:21,493 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:21,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:21,518 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:21,518 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_15=1} Honda state: {v_rep~unnamed0~0~true_15=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,550 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:21,550 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:21,554 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:21,555 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_15=0} Honda state: {v_rep~unnamed0~0~false_15=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,587 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:21,588 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:21,590 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:21,590 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:21,614 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:21,642 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:21,642 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,646 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:21,666 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:21,667 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:21,667 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:21,667 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:21,667 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:21,667 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,667 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:21,667 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:21,667 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration19_Loop [2020-10-19 18:43:21,667 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:21,668 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:21,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:21,738 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:21,738 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:21,748 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,749 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:21,750 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:21,750 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:21,750 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:21,751 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:21,751 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:21,756 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 83 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 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,776 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:21,777 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:21,777 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:21,778 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:21,778 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:21,778 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:21,778 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:21,779 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:21,780 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 84 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,803 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:21,804 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:21,804 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:21,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:21,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:21,805 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:21,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:21,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:21,807 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:21,809 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:43:21,809 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:21,813 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:21,813 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:21,813 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:21,813 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:43:21,834 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:43:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:21,899 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-10-19 18:43:21,899 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 258 transitions. cyclomatic complexity: 49 Second operand 5 states. [2020-10-19 18:43:22,029 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 258 transitions. cyclomatic complexity: 49. Second operand 5 states. Result 493 states and 601 transitions. Complement of second has 15 states. [2020-10-19 18:43:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 1 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:43:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2020-10-19 18:43:22,030 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 36 transitions. Stem has 44 letters. Loop has 48 letters. [2020-10-19 18:43:22,032 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:22,032 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 36 transitions. Stem has 92 letters. Loop has 48 letters. [2020-10-19 18:43:22,032 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:22,032 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 36 transitions. Stem has 44 letters. Loop has 96 letters. [2020-10-19 18:43:22,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:22,034 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 493 states and 601 transitions. [2020-10-19 18:43:22,037 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:22,040 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 493 states to 439 states and 521 transitions. [2020-10-19 18:43:22,040 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 178 [2020-10-19 18:43:22,041 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-19 18:43:22,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 439 states and 521 transitions. [2020-10-19 18:43:22,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:22,041 INFO L691 BuchiCegarLoop]: Abstraction has 439 states and 521 transitions. [2020-10-19 18:43:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states and 521 transitions. [2020-10-19 18:43:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 427. [2020-10-19 18:43:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-19 18:43:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 508 transitions. [2020-10-19 18:43:22,049 INFO L714 BuchiCegarLoop]: Abstraction has 427 states and 508 transitions. [2020-10-19 18:43:22,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:43:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:43:22,050 INFO L87 Difference]: Start difference. First operand 427 states and 508 transitions. Second operand 5 states. [2020-10-19 18:43:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:22,073 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2020-10-19 18:43:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:43:22,074 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 236 states and 278 transitions. [2020-10-19 18:43:22,075 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:22,077 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 236 states to 221 states and 263 transitions. [2020-10-19 18:43:22,077 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 135 [2020-10-19 18:43:22,077 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-19 18:43:22,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 263 transitions. [2020-10-19 18:43:22,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:22,078 INFO L691 BuchiCegarLoop]: Abstraction has 221 states and 263 transitions. [2020-10-19 18:43:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 263 transitions. [2020-10-19 18:43:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2020-10-19 18:43:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2020-10-19 18:43:22,083 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 256 transitions. [2020-10-19 18:43:22,083 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 256 transitions. [2020-10-19 18:43:22,083 INFO L427 BuchiCegarLoop]: ======== Iteration 20============ [2020-10-19 18:43:22,083 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 256 transitions. [2020-10-19 18:43:22,085 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:22,085 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:22,085 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:22,086 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:22,086 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [13, 12, 12, 10, 3, 1, 1] [2020-10-19 18:43:22,086 INFO L794 eck$LassoCheckResult]: Stem: 8449#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 8450#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8462#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 8516#L12-2 assume !(main_~i~0 <= 0); 8515#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8514#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8512#L12 assume !(main_~i~0 >= 10); 8513#L12-2 assume !(main_~i~0 <= 0); 8595#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8594#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8457#L12 assume !(main_~i~0 >= 10); 8458#L12-2 assume !(main_~i~0 <= 0); 8522#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8520#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8521#L12 assume !(main_~i~0 >= 10); 8593#L12-2 assume !(main_~i~0 <= 0); 8592#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8591#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8590#L12 assume !(main_~i~0 >= 10); 8589#L12-2 assume !(main_~i~0 <= 0); 8588#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8587#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8586#L12 assume !(main_~i~0 >= 10); 8585#L12-2 assume !(main_~i~0 <= 0); 8584#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8583#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8582#L12 assume !(main_~i~0 >= 10); 8581#L12-2 assume !(main_~i~0 <= 0); 8580#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8579#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8578#L12 assume !(main_~i~0 >= 10); 8577#L12-2 assume !(main_~i~0 <= 0); 8576#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8575#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8574#L12 assume !(main_~i~0 >= 10); 8573#L12-2 assume !(main_~i~0 <= 0); 8572#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8571#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8568#L12 assume !(main_~i~0 >= 10); 8570#L12-2 assume !(main_~i~0 <= 0); 8569#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8567#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8455#L12 assume !(main_~i~0 >= 10); 8456#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 8596#L15-1 [2020-10-19 18:43:22,086 INFO L796 eck$LassoCheckResult]: Loop: 8596#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 8565#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8566#L12 assume !(main_~i~0 >= 10); 8445#L12-2 assume !(main_~i~0 <= 0); 8446#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 8451#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8452#L12 assume !(main_~i~0 >= 10); 8531#L12-2 assume !(main_~i~0 <= 0); 8529#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 8528#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8525#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 8526#L12-2 assume !(main_~i~0 <= 0); 8459#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8460#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8527#L12 assume !(main_~i~0 >= 10); 8523#L12-2 assume !(main_~i~0 <= 0); 8524#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8631#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8630#L12 assume !(main_~i~0 >= 10); 8629#L12-2 assume !(main_~i~0 <= 0); 8628#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8627#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8626#L12 assume !(main_~i~0 >= 10); 8625#L12-2 assume !(main_~i~0 <= 0); 8624#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8623#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8622#L12 assume !(main_~i~0 >= 10); 8621#L12-2 assume !(main_~i~0 <= 0); 8620#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8619#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8618#L12 assume !(main_~i~0 >= 10); 8617#L12-2 assume !(main_~i~0 <= 0); 8616#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8615#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8614#L12 assume !(main_~i~0 >= 10); 8613#L12-2 assume !(main_~i~0 <= 0); 8612#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8611#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8610#L12 assume !(main_~i~0 >= 10); 8609#L12-2 assume !(main_~i~0 <= 0); 8608#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8607#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8606#L12 assume !(main_~i~0 >= 10); 8605#L12-2 assume !(main_~i~0 <= 0); 8604#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8603#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8602#L12 assume !(main_~i~0 >= 10); 8601#L12-2 assume !(main_~i~0 <= 0); 8598#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8600#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8599#L12 assume !(main_~i~0 >= 10); 8597#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 8596#L15-1 [2020-10-19 18:43:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 3 times [2020-10-19 18:43:22,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:22,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998333294] [2020-10-19 18:43:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:22,094 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:22,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:22,103 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:22,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2004957192, now seen corresponding path program 11 times [2020-10-19 18:43:22,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:22,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274466322] [2020-10-19 18:43:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:22,110 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:22,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:22,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash -364906343, now seen corresponding path program 10 times [2020-10-19 18:43:22,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:22,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35894525] [2020-10-19 18:43:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 671 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:22,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35894525] [2020-10-19 18:43:22,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956395922] [2020-10-19 18:43:22,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:22,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:43:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:43:22,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 671 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:22,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:22,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-19 18:43:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446250270] [2020-10-19 18:43:22,544 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 53 [2020-10-19 18:43:22,561 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:22,562 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:22,562 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:22,562 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:22,562 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:22,562 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,562 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:22,562 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:22,562 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration20_Loop [2020-10-19 18:43:22,562 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:22,562 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:22,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,631 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:22,631 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 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 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:22,636 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:22,639 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:22,640 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_17=1} Honda state: {v_rep~unnamed0~0~true_17=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:22,663 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,688 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:22,688 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:22,695 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:22,716 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:22,716 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:22,716 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:22,716 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:22,716 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:22,716 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,716 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:22,716 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:22,716 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration20_Loop [2020-10-19 18:43:22,716 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:22,717 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:22,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:22,780 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:22,780 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,783 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:22,784 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:22,784 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:22,785 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:22,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:22,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:22,785 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:22,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:22,788 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:22,796 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:22,796 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 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:22,799 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:22,799 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:22,800 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:22,800 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:22,827 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:43:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:22,909 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-10-19 18:43:22,909 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 256 transitions. cyclomatic complexity: 47 Second operand 6 states. [2020-10-19 18:43:23,086 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 256 transitions. cyclomatic complexity: 47. Second operand 6 states. Result 565 states and 685 transitions. Complement of second has 19 states. [2020-10-19 18:43:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 18:43:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 45 transitions. [2020-10-19 18:43:23,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 45 transitions. Stem has 44 letters. Loop has 52 letters. [2020-10-19 18:43:23,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:23,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 45 transitions. Stem has 96 letters. Loop has 52 letters. [2020-10-19 18:43:23,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:23,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 45 transitions. Stem has 44 letters. Loop has 104 letters. [2020-10-19 18:43:23,090 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:23,090 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 565 states and 685 transitions. [2020-10-19 18:43:23,093 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:23,098 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 565 states to 483 states and 571 transitions. [2020-10-19 18:43:23,099 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 182 [2020-10-19 18:43:23,099 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 188 [2020-10-19 18:43:23,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 483 states and 571 transitions. [2020-10-19 18:43:23,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:23,100 INFO L691 BuchiCegarLoop]: Abstraction has 483 states and 571 transitions. [2020-10-19 18:43:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states and 571 transitions. [2020-10-19 18:43:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 469. [2020-10-19 18:43:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-19 18:43:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 556 transitions. [2020-10-19 18:43:23,108 INFO L714 BuchiCegarLoop]: Abstraction has 469 states and 556 transitions. [2020-10-19 18:43:23,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:43:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:43:23,109 INFO L87 Difference]: Start difference. First operand 469 states and 556 transitions. Second operand 6 states. [2020-10-19 18:43:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:23,147 INFO L93 Difference]: Finished difference Result 248 states and 288 transitions. [2020-10-19 18:43:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:43:23,150 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 248 states and 288 transitions. [2020-10-19 18:43:23,152 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:23,154 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 248 states to 225 states and 265 transitions. [2020-10-19 18:43:23,154 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2020-10-19 18:43:23,154 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2020-10-19 18:43:23,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 225 states and 265 transitions. [2020-10-19 18:43:23,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:23,155 INFO L691 BuchiCegarLoop]: Abstraction has 225 states and 265 transitions. [2020-10-19 18:43:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states and 265 transitions. [2020-10-19 18:43:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2020-10-19 18:43:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 254 transitions. [2020-10-19 18:43:23,159 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 254 transitions. [2020-10-19 18:43:23,159 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 254 transitions. [2020-10-19 18:43:23,160 INFO L427 BuchiCegarLoop]: ======== Iteration 21============ [2020-10-19 18:43:23,160 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 254 transitions. [2020-10-19 18:43:23,161 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:23,161 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:23,161 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:23,167 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:23,168 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [14, 13, 13, 10, 4, 1, 1] [2020-10-19 18:43:23,168 INFO L794 eck$LassoCheckResult]: Stem: 10571#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 10572#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10584#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 10637#L12-2 assume !(main_~i~0 <= 0); 10636#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10635#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10633#L12 assume !(main_~i~0 >= 10); 10634#L12-2 assume !(main_~i~0 <= 0); 10675#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10674#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10578#L12 assume !(main_~i~0 >= 10); 10579#L12-2 assume !(main_~i~0 <= 0); 10643#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10641#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10642#L12 assume !(main_~i~0 >= 10); 10673#L12-2 assume !(main_~i~0 <= 0); 10672#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10671#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10670#L12 assume !(main_~i~0 >= 10); 10669#L12-2 assume !(main_~i~0 <= 0); 10668#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10667#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10666#L12 assume !(main_~i~0 >= 10); 10665#L12-2 assume !(main_~i~0 <= 0); 10664#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10663#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10662#L12 assume !(main_~i~0 >= 10); 10661#L12-2 assume !(main_~i~0 <= 0); 10660#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10659#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10658#L12 assume !(main_~i~0 >= 10); 10657#L12-2 assume !(main_~i~0 <= 0); 10656#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10655#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10654#L12 assume !(main_~i~0 >= 10); 10653#L12-2 assume !(main_~i~0 <= 0); 10652#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10651#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10647#L12 assume !(main_~i~0 >= 10); 10650#L12-2 assume !(main_~i~0 <= 0); 10649#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10646#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10648#L12 assume !(main_~i~0 >= 10); 10688#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 10689#L15-1 [2020-10-19 18:43:23,168 INFO L796 eck$LassoCheckResult]: Loop: 10689#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10684#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10685#L12 assume !(main_~i~0 >= 10); 10692#L12-2 assume !(main_~i~0 <= 0); 10686#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10687#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10577#L12 assume !(main_~i~0 >= 10); 10567#L12-2 assume !(main_~i~0 <= 0); 10568#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10780#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10779#L12 assume !(main_~i~0 >= 10); 10759#L12-2 assume !(main_~i~0 <= 0); 10680#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10679#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10677#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 10678#L12-2 assume !(main_~i~0 <= 0); 10725#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10573#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10574#L12 assume !(main_~i~0 >= 10); 10676#L12-2 assume !(main_~i~0 <= 0); 10580#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10581#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10724#L12 assume !(main_~i~0 >= 10); 10723#L12-2 assume !(main_~i~0 <= 0); 10722#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10721#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10720#L12 assume !(main_~i~0 >= 10); 10719#L12-2 assume !(main_~i~0 <= 0); 10718#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10717#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10716#L12 assume !(main_~i~0 >= 10); 10715#L12-2 assume !(main_~i~0 <= 0); 10714#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10713#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10712#L12 assume !(main_~i~0 >= 10); 10711#L12-2 assume !(main_~i~0 <= 0); 10710#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10709#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10708#L12 assume !(main_~i~0 >= 10); 10707#L12-2 assume !(main_~i~0 <= 0); 10706#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10705#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10704#L12 assume !(main_~i~0 >= 10); 10703#L12-2 assume !(main_~i~0 <= 0); 10702#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10701#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10700#L12 assume !(main_~i~0 >= 10); 10699#L12-2 assume !(main_~i~0 <= 0); 10698#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10697#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10696#L12 assume !(main_~i~0 >= 10); 10695#L12-2 assume !(main_~i~0 <= 0); 10691#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10694#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10693#L12 assume !(main_~i~0 >= 10); 10690#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 10689#L15-1 [2020-10-19 18:43:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 4 times [2020-10-19 18:43:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:23,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920711412] [2020-10-19 18:43:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:23,176 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:23,181 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:23,184 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash -102857041, now seen corresponding path program 12 times [2020-10-19 18:43:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:23,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065185821] [2020-10-19 18:43:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:23,191 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:23,196 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:23,199 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1080327888, now seen corresponding path program 11 times [2020-10-19 18:43:23,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122362477] [2020-10-19 18:43:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 755 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:23,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122362477] [2020-10-19 18:43:23,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552976058] [2020-10-19 18:43:23,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:23,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-19 18:43:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:43:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 755 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:23,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:23,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-19 18:43:23,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790053918] [2020-10-19 18:43:23,612 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 57 [2020-10-19 18:43:23,625 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:23,625 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:23,625 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:23,625 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:23,625 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:23,625 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:23,626 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:23,626 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:23,626 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration21_Loop [2020-10-19 18:43:23,626 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:23,626 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:23,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,694 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:23,694 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 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 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:23,698 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:23,698 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 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 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:23,724 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:23,724 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:23,728 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:23,749 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:23,750 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:23,750 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:23,750 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:23,750 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:23,750 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:23,750 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:23,750 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:23,750 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration21_Loop [2020-10-19 18:43:23,750 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:23,750 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:23,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:23,815 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:23,815 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:23,823 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:23,825 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:23,825 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:23,825 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:23,825 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:23,825 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:23,826 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:23,826 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:23,828 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:23,831 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:23,831 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 96 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:23,833 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:23,833 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:23,834 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:23,834 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:43:23,853 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:43:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:23,991 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2020-10-19 18:43:23,991 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 254 transitions. cyclomatic complexity: 45 Second operand 7 states. [2020-10-19 18:43:24,257 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 254 transitions. cyclomatic complexity: 45. Second operand 7 states. Result 653 states and 789 transitions. Complement of second has 23 states. [2020-10-19 18:43:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 1 stem states 10 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:43:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 54 transitions. [2020-10-19 18:43:24,259 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 44 letters. Loop has 56 letters. [2020-10-19 18:43:24,259 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:24,259 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 100 letters. Loop has 56 letters. [2020-10-19 18:43:24,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:24,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 44 letters. Loop has 112 letters. [2020-10-19 18:43:24,261 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:24,261 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 653 states and 789 transitions. [2020-10-19 18:43:24,265 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:24,268 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 653 states to 535 states and 631 transitions. [2020-10-19 18:43:24,268 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 186 [2020-10-19 18:43:24,269 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2020-10-19 18:43:24,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 535 states and 631 transitions. [2020-10-19 18:43:24,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:24,269 INFO L691 BuchiCegarLoop]: Abstraction has 535 states and 631 transitions. [2020-10-19 18:43:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states and 631 transitions. [2020-10-19 18:43:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2020-10-19 18:43:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-19 18:43:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 614 transitions. [2020-10-19 18:43:24,277 INFO L714 BuchiCegarLoop]: Abstraction has 519 states and 614 transitions. [2020-10-19 18:43:24,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:24,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:43:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:43:24,278 INFO L87 Difference]: Start difference. First operand 519 states and 614 transitions. Second operand 7 states. [2020-10-19 18:43:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:24,323 INFO L93 Difference]: Finished difference Result 260 states and 298 transitions. [2020-10-19 18:43:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:43:24,324 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 260 states and 298 transitions. [2020-10-19 18:43:24,326 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:24,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 260 states to 229 states and 267 transitions. [2020-10-19 18:43:24,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 143 [2020-10-19 18:43:24,328 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2020-10-19 18:43:24,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 267 transitions. [2020-10-19 18:43:24,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:24,329 INFO L691 BuchiCegarLoop]: Abstraction has 229 states and 267 transitions. [2020-10-19 18:43:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 267 transitions. [2020-10-19 18:43:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2020-10-19 18:43:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2020-10-19 18:43:24,334 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 252 transitions. [2020-10-19 18:43:24,334 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 252 transitions. [2020-10-19 18:43:24,334 INFO L427 BuchiCegarLoop]: ======== Iteration 22============ [2020-10-19 18:43:24,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 252 transitions. [2020-10-19 18:43:24,335 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:24,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:24,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:24,336 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:24,336 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [15, 14, 14, 10, 5, 1, 1] [2020-10-19 18:43:24,337 INFO L794 eck$LassoCheckResult]: Stem: 12876#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 12877#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12888#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 12940#L12-2 assume !(main_~i~0 <= 0); 12939#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12938#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12936#L12 assume !(main_~i~0 >= 10); 12937#L12-2 assume !(main_~i~0 <= 0); 12946#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12947#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12883#L12 assume !(main_~i~0 >= 10); 12884#L12-2 assume !(main_~i~0 <= 0); 12948#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12944#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12945#L12 assume !(main_~i~0 >= 10); 13050#L12-2 assume !(main_~i~0 <= 0); 13049#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13048#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13047#L12 assume !(main_~i~0 >= 10); 13046#L12-2 assume !(main_~i~0 <= 0); 13045#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13044#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13043#L12 assume !(main_~i~0 >= 10); 13042#L12-2 assume !(main_~i~0 <= 0); 13041#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13040#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13039#L12 assume !(main_~i~0 >= 10); 13038#L12-2 assume !(main_~i~0 <= 0); 13037#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13036#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13035#L12 assume !(main_~i~0 >= 10); 13034#L12-2 assume !(main_~i~0 <= 0); 13033#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13032#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13031#L12 assume !(main_~i~0 >= 10); 13030#L12-2 assume !(main_~i~0 <= 0); 13029#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13028#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13024#L12 assume !(main_~i~0 >= 10); 13027#L12-2 assume !(main_~i~0 <= 0); 13026#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13023#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12882#L12 assume !(main_~i~0 >= 10); 12872#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 12873#L15-1 [2020-10-19 18:43:24,337 INFO L796 eck$LassoCheckResult]: Loop: 12873#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12878#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12879#L12 assume !(main_~i~0 >= 10); 12987#L12-2 assume !(main_~i~0 <= 0); 12986#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12985#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12984#L12 assume !(main_~i~0 >= 10); 12983#L12-2 assume !(main_~i~0 <= 0); 12982#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12981#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12980#L12 assume !(main_~i~0 >= 10); 12961#L12-2 assume !(main_~i~0 <= 0); 12960#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12958#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12959#L12 assume !(main_~i~0 >= 10); 12962#L12-2 assume !(main_~i~0 <= 0); 12954#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12953#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12950#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 12951#L12-2 assume !(main_~i~0 <= 0); 13025#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13022#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12952#L12 assume !(main_~i~0 >= 10); 12949#L12-2 assume !(main_~i~0 <= 0); 12885#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12886#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13021#L12 assume !(main_~i~0 >= 10); 13020#L12-2 assume !(main_~i~0 <= 0); 13019#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13018#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13017#L12 assume !(main_~i~0 >= 10); 13016#L12-2 assume !(main_~i~0 <= 0); 13015#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13014#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13013#L12 assume !(main_~i~0 >= 10); 13012#L12-2 assume !(main_~i~0 <= 0); 13011#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13010#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13009#L12 assume !(main_~i~0 >= 10); 13008#L12-2 assume !(main_~i~0 <= 0); 13007#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13006#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13005#L12 assume !(main_~i~0 >= 10); 13004#L12-2 assume !(main_~i~0 <= 0); 13003#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13002#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13001#L12 assume !(main_~i~0 >= 10); 13000#L12-2 assume !(main_~i~0 <= 0); 12999#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12998#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12997#L12 assume !(main_~i~0 >= 10); 12996#L12-2 assume !(main_~i~0 <= 0); 12995#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12994#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12993#L12 assume !(main_~i~0 >= 10); 12992#L12-2 assume !(main_~i~0 <= 0); 12989#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12991#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12990#L12 assume !(main_~i~0 >= 10); 12988#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 12873#L15-1 [2020-10-19 18:43:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 5 times [2020-10-19 18:43:24,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:24,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444520318] [2020-10-19 18:43:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:24,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:24,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:24,349 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 591532518, now seen corresponding path program 13 times [2020-10-19 18:43:24,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:24,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416360564] [2020-10-19 18:43:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:24,356 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:24,361 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:24,363 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1205670279, now seen corresponding path program 12 times [2020-10-19 18:43:24,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:24,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960005142] [2020-10-19 18:43:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 839 proven. 36 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:24,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960005142] [2020-10-19 18:43:24,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717070747] [2020-10-19 18:43:24,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:24,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-10-19 18:43:24,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:24,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:43:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 839 proven. 36 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:24,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:24,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-19 18:43:24,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994615915] [2020-10-19 18:43:24,801 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 60 [2020-10-19 18:43:24,822 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:24,822 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:24,823 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:24,823 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:24,823 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:24,823 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:24,823 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:24,823 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:24,824 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration22_Loop [2020-10-19 18:43:24,824 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:24,824 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:24,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,888 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:24,889 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 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 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:24,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:24,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:24,895 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:24,895 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_21=0} Honda state: {v_rep~unnamed0~0~false_21=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 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 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:24,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:24,920 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 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 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:24,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:24,945 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:24,948 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:24,969 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:24,969 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:24,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:24,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:24,969 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:24,969 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:24,969 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:24,969 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:24,969 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration22_Loop [2020-10-19 18:43:24,969 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:24,969 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:24,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:24,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:25,038 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:25,039 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 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 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:25,042 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:25,043 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:25,044 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:25,044 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:25,044 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:25,046 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:25,046 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:25,049 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 102 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 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:25,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:25,073 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:25,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:25,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:25,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:25,074 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:25,074 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:25,078 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 103 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 103 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:25,101 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:25,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:25,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:25,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:25,103 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:25,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:25,103 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:25,103 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:25,105 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:25,108 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:25,108 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 104 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 104 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:25,111 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:25,111 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:25,111 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:25,111 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:43:25,131 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:25,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:43:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:25,224 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 7 loop predicates [2020-10-19 18:43:25,224 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 252 transitions. cyclomatic complexity: 43 Second operand 8 states. [2020-10-19 18:43:25,538 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 252 transitions. cyclomatic complexity: 43. Second operand 8 states. Result 757 states and 913 transitions. Complement of second has 27 states. [2020-10-19 18:43:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 1 stem states 12 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 18:43:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 63 transitions. [2020-10-19 18:43:25,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 63 transitions. Stem has 44 letters. Loop has 60 letters. [2020-10-19 18:43:25,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:25,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 63 transitions. Stem has 104 letters. Loop has 60 letters. [2020-10-19 18:43:25,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:25,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 63 transitions. Stem has 44 letters. Loop has 120 letters. [2020-10-19 18:43:25,546 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:25,547 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 757 states and 913 transitions. [2020-10-19 18:43:25,551 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:25,554 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 757 states to 595 states and 701 transitions. [2020-10-19 18:43:25,555 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 190 [2020-10-19 18:43:25,555 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-19 18:43:25,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 595 states and 701 transitions. [2020-10-19 18:43:25,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:25,556 INFO L691 BuchiCegarLoop]: Abstraction has 595 states and 701 transitions. [2020-10-19 18:43:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states and 701 transitions. [2020-10-19 18:43:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 577. [2020-10-19 18:43:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-19 18:43:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 682 transitions. [2020-10-19 18:43:25,565 INFO L714 BuchiCegarLoop]: Abstraction has 577 states and 682 transitions. [2020-10-19 18:43:25,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:43:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:43:25,566 INFO L87 Difference]: Start difference. First operand 577 states and 682 transitions. Second operand 8 states. [2020-10-19 18:43:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:25,625 INFO L93 Difference]: Finished difference Result 272 states and 308 transitions. [2020-10-19 18:43:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:43:25,626 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 308 transitions. [2020-10-19 18:43:25,627 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:25,629 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 233 states and 269 transitions. [2020-10-19 18:43:25,629 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 147 [2020-10-19 18:43:25,629 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 147 [2020-10-19 18:43:25,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 233 states and 269 transitions. [2020-10-19 18:43:25,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:25,630 INFO L691 BuchiCegarLoop]: Abstraction has 233 states and 269 transitions. [2020-10-19 18:43:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states and 269 transitions. [2020-10-19 18:43:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 214. [2020-10-19 18:43:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 250 transitions. [2020-10-19 18:43:25,635 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 250 transitions. [2020-10-19 18:43:25,635 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 250 transitions. [2020-10-19 18:43:25,636 INFO L427 BuchiCegarLoop]: ======== Iteration 23============ [2020-10-19 18:43:25,636 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 250 transitions. [2020-10-19 18:43:25,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:25,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:25,638 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:25,639 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:25,639 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [16, 15, 15, 10, 6, 1, 1] [2020-10-19 18:43:25,640 INFO L794 eck$LassoCheckResult]: Stem: 15388#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 15389#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15400#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 15453#L12-2 assume !(main_~i~0 <= 0); 15452#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15451#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15449#L12 assume !(main_~i~0 >= 10); 15450#L12-2 assume !(main_~i~0 <= 0); 15566#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15564#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15395#L12 assume !(main_~i~0 >= 10); 15396#L12-2 assume !(main_~i~0 <= 0); 15459#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15457#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15458#L12 assume !(main_~i~0 >= 10); 15561#L12-2 assume !(main_~i~0 <= 0); 15559#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15557#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15555#L12 assume !(main_~i~0 >= 10); 15553#L12-2 assume !(main_~i~0 <= 0); 15551#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15549#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15547#L12 assume !(main_~i~0 >= 10); 15545#L12-2 assume !(main_~i~0 <= 0); 15543#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15541#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15539#L12 assume !(main_~i~0 >= 10); 15537#L12-2 assume !(main_~i~0 <= 0); 15535#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15533#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15531#L12 assume !(main_~i~0 >= 10); 15529#L12-2 assume !(main_~i~0 <= 0); 15527#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15525#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15523#L12 assume !(main_~i~0 >= 10); 15521#L12-2 assume !(main_~i~0 <= 0); 15519#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15517#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15508#L12 assume !(main_~i~0 >= 10); 15514#L12-2 assume !(main_~i~0 <= 0); 15511#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15507#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15500#L12 assume !(main_~i~0 >= 10); 15384#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 15385#L15-1 [2020-10-19 18:43:25,640 INFO L796 eck$LassoCheckResult]: Loop: 15385#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15390#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15391#L12 assume !(main_~i~0 >= 10); 15394#L12-2 assume !(main_~i~0 <= 0); 15497#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15496#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15495#L12 assume !(main_~i~0 >= 10); 15494#L12-2 assume !(main_~i~0 <= 0); 15493#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15492#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15491#L12 assume !(main_~i~0 >= 10); 15490#L12-2 assume !(main_~i~0 <= 0); 15489#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15488#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15487#L12 assume !(main_~i~0 >= 10); 15472#L12-2 assume !(main_~i~0 <= 0); 15473#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15469#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15467#L12 assume !(main_~i~0 >= 10); 15468#L12-2 assume !(main_~i~0 <= 0); 15465#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15464#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15461#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 15462#L12-2 assume !(main_~i~0 <= 0); 15569#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15568#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15463#L12 assume !(main_~i~0 >= 10); 15460#L12-2 assume !(main_~i~0 <= 0); 15397#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15398#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15567#L12 assume !(main_~i~0 >= 10); 15565#L12-2 assume !(main_~i~0 <= 0); 15563#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15562#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15560#L12 assume !(main_~i~0 >= 10); 15558#L12-2 assume !(main_~i~0 <= 0); 15556#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15554#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15552#L12 assume !(main_~i~0 >= 10); 15550#L12-2 assume !(main_~i~0 <= 0); 15548#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15546#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15544#L12 assume !(main_~i~0 >= 10); 15542#L12-2 assume !(main_~i~0 <= 0); 15540#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15538#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15536#L12 assume !(main_~i~0 >= 10); 15534#L12-2 assume !(main_~i~0 <= 0); 15532#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15530#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15528#L12 assume !(main_~i~0 >= 10); 15526#L12-2 assume !(main_~i~0 <= 0); 15524#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15522#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15520#L12 assume !(main_~i~0 >= 10); 15518#L12-2 assume !(main_~i~0 <= 0); 15516#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15515#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15512#L12 assume !(main_~i~0 >= 10); 15509#L12-2 assume !(main_~i~0 <= 0); 15499#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15505#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15503#L12 assume !(main_~i~0 >= 10); 15498#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 15385#L15-1 [2020-10-19 18:43:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 6 times [2020-10-19 18:43:25,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:25,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221204862] [2020-10-19 18:43:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:25,649 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:25,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:25,658 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1930483299, now seen corresponding path program 14 times [2020-10-19 18:43:25,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:25,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734823593] [2020-10-19 18:43:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:25,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:25,674 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:25,677 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash -422612802, now seen corresponding path program 13 times [2020-10-19 18:43:25,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:25,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630431592] [2020-10-19 18:43:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 923 proven. 55 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:25,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630431592] [2020-10-19 18:43:25,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66223024] [2020-10-19 18:43:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:43:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 923 proven. 55 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:25,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:25,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-19 18:43:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133520348] [2020-10-19 18:43:26,202 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 64 [2020-10-19 18:43:26,215 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:26,215 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:26,216 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:26,216 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:26,216 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:26,216 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,216 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:26,216 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:26,216 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration23_Loop [2020-10-19 18:43:26,216 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:26,216 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:26,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,280 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:26,280 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:26,283 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:26,284 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,287 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:26,288 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_23=1} Honda state: {v_rep~unnamed0~0~true_23=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:26,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:26,325 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 107 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 108 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 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:26,351 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:26,354 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:26,376 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:26,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:26,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:26,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:26,377 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:26,377 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,377 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:26,377 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:26,377 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration23_Loop [2020-10-19 18:43:26,377 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:26,377 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:26,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:26,468 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:26,469 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 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 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,472 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:26,473 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:26,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:26,473 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:26,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:26,474 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:26,474 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:26,479 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 110 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 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,501 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:26,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:26,502 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:26,502 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:26,502 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:26,502 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:26,503 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:26,503 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:26,505 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:26,508 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:26,508 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 111 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 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:26,510 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:26,510 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:26,510 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:26,511 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:43:26,530 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:26,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:43:26,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:26,652 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2020-10-19 18:43:26,652 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 250 transitions. cyclomatic complexity: 41 Second operand 9 states. [2020-10-19 18:43:27,069 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 250 transitions. cyclomatic complexity: 41. Second operand 9 states. Result 877 states and 1057 transitions. Complement of second has 31 states. [2020-10-19 18:43:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 16 states 1 stem states 14 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 18:43:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 72 transitions. [2020-10-19 18:43:27,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 72 transitions. Stem has 44 letters. Loop has 64 letters. [2020-10-19 18:43:27,071 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:27,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 72 transitions. Stem has 108 letters. Loop has 64 letters. [2020-10-19 18:43:27,071 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:27,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 72 transitions. Stem has 44 letters. Loop has 128 letters. [2020-10-19 18:43:27,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:27,072 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 877 states and 1057 transitions. [2020-10-19 18:43:27,075 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:27,078 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 877 states to 663 states and 781 transitions. [2020-10-19 18:43:27,078 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 194 [2020-10-19 18:43:27,078 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 203 [2020-10-19 18:43:27,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 663 states and 781 transitions. [2020-10-19 18:43:27,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:27,079 INFO L691 BuchiCegarLoop]: Abstraction has 663 states and 781 transitions. [2020-10-19 18:43:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states and 781 transitions. [2020-10-19 18:43:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 643. [2020-10-19 18:43:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-10-19 18:43:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 760 transitions. [2020-10-19 18:43:27,087 INFO L714 BuchiCegarLoop]: Abstraction has 643 states and 760 transitions. [2020-10-19 18:43:27,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:43:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:43:27,088 INFO L87 Difference]: Start difference. First operand 643 states and 760 transitions. Second operand 9 states. [2020-10-19 18:43:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:27,143 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2020-10-19 18:43:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:43:27,144 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 284 states and 318 transitions. [2020-10-19 18:43:27,146 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:27,148 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 284 states to 237 states and 271 transitions. [2020-10-19 18:43:27,148 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2020-10-19 18:43:27,148 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 151 [2020-10-19 18:43:27,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 237 states and 271 transitions. [2020-10-19 18:43:27,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:27,148 INFO L691 BuchiCegarLoop]: Abstraction has 237 states and 271 transitions. [2020-10-19 18:43:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states and 271 transitions. [2020-10-19 18:43:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 214. [2020-10-19 18:43:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2020-10-19 18:43:27,153 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 248 transitions. [2020-10-19 18:43:27,153 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 248 transitions. [2020-10-19 18:43:27,153 INFO L427 BuchiCegarLoop]: ======== Iteration 24============ [2020-10-19 18:43:27,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 248 transitions. [2020-10-19 18:43:27,155 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:27,155 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:27,155 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:27,156 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:27,156 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [17, 16, 16, 10, 7, 1, 1] [2020-10-19 18:43:27,156 INFO L794 eck$LassoCheckResult]: Stem: 18131#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 18132#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18142#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 18195#L12-2 assume !(main_~i~0 <= 0); 18194#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18193#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18191#L12 assume !(main_~i~0 >= 10); 18192#L12-2 assume !(main_~i~0 <= 0); 18201#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18202#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18138#L12 assume !(main_~i~0 >= 10); 18139#L12-2 assume !(main_~i~0 <= 0); 18203#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18199#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18200#L12 assume !(main_~i~0 >= 10); 18305#L12-2 assume !(main_~i~0 <= 0); 18304#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18303#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18302#L12 assume !(main_~i~0 >= 10); 18301#L12-2 assume !(main_~i~0 <= 0); 18300#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18299#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18298#L12 assume !(main_~i~0 >= 10); 18297#L12-2 assume !(main_~i~0 <= 0); 18296#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18295#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18294#L12 assume !(main_~i~0 >= 10); 18293#L12-2 assume !(main_~i~0 <= 0); 18292#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18291#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18290#L12 assume !(main_~i~0 >= 10); 18289#L12-2 assume !(main_~i~0 <= 0); 18288#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18287#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18286#L12 assume !(main_~i~0 >= 10); 18285#L12-2 assume !(main_~i~0 <= 0); 18284#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18283#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18279#L12 assume !(main_~i~0 >= 10); 18282#L12-2 assume !(main_~i~0 <= 0); 18281#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18278#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18137#L12 assume !(main_~i~0 >= 10); 18127#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 18128#L15-1 [2020-10-19 18:43:27,156 INFO L796 eck$LassoCheckResult]: Loop: 18128#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18133#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18134#L12 assume !(main_~i~0 >= 10); 18242#L12-2 assume !(main_~i~0 <= 0); 18241#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18240#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18239#L12 assume !(main_~i~0 >= 10); 18238#L12-2 assume !(main_~i~0 <= 0); 18237#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18236#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18235#L12 assume !(main_~i~0 >= 10); 18234#L12-2 assume !(main_~i~0 <= 0); 18233#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18232#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18231#L12 assume !(main_~i~0 >= 10); 18230#L12-2 assume !(main_~i~0 <= 0); 18229#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18228#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18227#L12 assume !(main_~i~0 >= 10); 18216#L12-2 assume !(main_~i~0 <= 0); 18217#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18213#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18211#L12 assume !(main_~i~0 >= 10); 18212#L12-2 assume !(main_~i~0 <= 0); 18209#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18208#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18205#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 18206#L12-2 assume !(main_~i~0 <= 0); 18280#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18277#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18207#L12 assume !(main_~i~0 >= 10); 18204#L12-2 assume !(main_~i~0 <= 0); 18140#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18141#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18276#L12 assume !(main_~i~0 >= 10); 18275#L12-2 assume !(main_~i~0 <= 0); 18274#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18273#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18272#L12 assume !(main_~i~0 >= 10); 18271#L12-2 assume !(main_~i~0 <= 0); 18270#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18269#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18268#L12 assume !(main_~i~0 >= 10); 18267#L12-2 assume !(main_~i~0 <= 0); 18266#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18265#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18264#L12 assume !(main_~i~0 >= 10); 18263#L12-2 assume !(main_~i~0 <= 0); 18262#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18261#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18260#L12 assume !(main_~i~0 >= 10); 18259#L12-2 assume !(main_~i~0 <= 0); 18258#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18257#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18256#L12 assume !(main_~i~0 >= 10); 18255#L12-2 assume !(main_~i~0 <= 0); 18254#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18253#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18252#L12 assume !(main_~i~0 >= 10); 18251#L12-2 assume !(main_~i~0 <= 0); 18250#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18249#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18248#L12 assume !(main_~i~0 >= 10); 18247#L12-2 assume !(main_~i~0 <= 0); 18244#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18246#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18245#L12 assume !(main_~i~0 >= 10); 18243#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 18128#L15-1 [2020-10-19 18:43:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 7 times [2020-10-19 18:43:27,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:27,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023858133] [2020-10-19 18:43:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:27,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:27,170 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:27,178 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1504997932, now seen corresponding path program 15 times [2020-10-19 18:43:27,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:27,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423804436] [2020-10-19 18:43:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:27,188 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:27,195 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:27,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash -92185483, now seen corresponding path program 14 times [2020-10-19 18:43:27,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:27,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872802588] [2020-10-19 18:43:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1007 proven. 78 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:27,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872802588] [2020-10-19 18:43:27,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766344176] [2020-10-19 18:43:27,276 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:27,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:43:27,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:43:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1007 proven. 78 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:27,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:27,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-19 18:43:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2392194] [2020-10-19 18:43:27,736 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 66 [2020-10-19 18:43:27,752 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:27,752 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:27,752 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:27,752 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:27,752 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:27,753 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,753 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:27,753 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:27,753 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration24_Loop [2020-10-19 18:43:27,753 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:27,753 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:27,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,817 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:27,817 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 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 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:27,821 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 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 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,844 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:27,844 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:27,847 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:27,869 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:27,869 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:27,869 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:27,870 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:27,870 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:27,870 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:27,870 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:27,870 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration24_Loop [2020-10-19 18:43:27,870 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:27,870 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:27,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:27,931 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:27,931 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 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 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,935 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:27,936 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:27,936 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:27,936 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:27,936 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:27,938 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:27,938 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:27,942 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 116 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,963 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:27,964 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:27,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:27,964 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:27,964 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:27,964 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:27,965 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:27,965 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:27,968 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:27,970 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:43:27,970 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 117 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 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:27,972 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:27,972 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:27,973 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:27,973 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:43:27,993 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:28,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:43:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:28,112 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 9 loop predicates [2020-10-19 18:43:28,113 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 248 transitions. cyclomatic complexity: 39 Second operand 10 states. [2020-10-19 18:43:28,563 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 248 transitions. cyclomatic complexity: 39. Second operand 10 states. Result 1013 states and 1221 transitions. Complement of second has 35 states. [2020-10-19 18:43:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 1 stem states 16 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 18:43:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 81 transitions. [2020-10-19 18:43:28,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 81 transitions. Stem has 44 letters. Loop has 68 letters. [2020-10-19 18:43:28,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:28,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 81 transitions. Stem has 112 letters. Loop has 68 letters. [2020-10-19 18:43:28,566 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:28,566 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 81 transitions. Stem has 44 letters. Loop has 136 letters. [2020-10-19 18:43:28,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:28,568 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1013 states and 1221 transitions. [2020-10-19 18:43:28,573 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:28,577 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1013 states to 739 states and 871 transitions. [2020-10-19 18:43:28,577 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 198 [2020-10-19 18:43:28,577 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2020-10-19 18:43:28,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 739 states and 871 transitions. [2020-10-19 18:43:28,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:28,578 INFO L691 BuchiCegarLoop]: Abstraction has 739 states and 871 transitions. [2020-10-19 18:43:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states and 871 transitions. [2020-10-19 18:43:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 717. [2020-10-19 18:43:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-19 18:43:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 848 transitions. [2020-10-19 18:43:28,589 INFO L714 BuchiCegarLoop]: Abstraction has 717 states and 848 transitions. [2020-10-19 18:43:28,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:43:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:43:28,590 INFO L87 Difference]: Start difference. First operand 717 states and 848 transitions. Second operand 10 states. [2020-10-19 18:43:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:28,647 INFO L93 Difference]: Finished difference Result 296 states and 328 transitions. [2020-10-19 18:43:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:43:28,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 296 states and 328 transitions. [2020-10-19 18:43:28,649 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:28,651 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 296 states to 241 states and 273 transitions. [2020-10-19 18:43:28,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2020-10-19 18:43:28,651 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 155 [2020-10-19 18:43:28,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 241 states and 273 transitions. [2020-10-19 18:43:28,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:28,652 INFO L691 BuchiCegarLoop]: Abstraction has 241 states and 273 transitions. [2020-10-19 18:43:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states and 273 transitions. [2020-10-19 18:43:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 214. [2020-10-19 18:43:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 246 transitions. [2020-10-19 18:43:28,656 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 246 transitions. [2020-10-19 18:43:28,656 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 246 transitions. [2020-10-19 18:43:28,656 INFO L427 BuchiCegarLoop]: ======== Iteration 25============ [2020-10-19 18:43:28,657 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 246 transitions. [2020-10-19 18:43:28,658 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:28,658 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:28,658 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:28,659 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:28,659 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [18, 17, 17, 10, 8, 1, 1] [2020-10-19 18:43:28,659 INFO L794 eck$LassoCheckResult]: Stem: 21129#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 21130#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21141#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 21194#L12-2 assume !(main_~i~0 <= 0); 21193#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21192#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21190#L12 assume !(main_~i~0 >= 10); 21191#L12-2 assume !(main_~i~0 <= 0); 21201#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21317#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21137#L12 assume !(main_~i~0 >= 10); 21138#L12-2 assume !(main_~i~0 <= 0); 21200#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21198#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21199#L12 assume !(main_~i~0 >= 10); 21299#L12-2 assume !(main_~i~0 <= 0); 21297#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21295#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21293#L12 assume !(main_~i~0 >= 10); 21291#L12-2 assume !(main_~i~0 <= 0); 21289#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21287#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21285#L12 assume !(main_~i~0 >= 10); 21283#L12-2 assume !(main_~i~0 <= 0); 21281#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21279#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21277#L12 assume !(main_~i~0 >= 10); 21275#L12-2 assume !(main_~i~0 <= 0); 21273#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21271#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21269#L12 assume !(main_~i~0 >= 10); 21267#L12-2 assume !(main_~i~0 <= 0); 21265#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21263#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21261#L12 assume !(main_~i~0 >= 10); 21259#L12-2 assume !(main_~i~0 <= 0); 21257#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21255#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21248#L12 assume !(main_~i~0 >= 10); 21252#L12-2 assume !(main_~i~0 <= 0); 21251#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21247#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21244#L12 assume !(main_~i~0 >= 10); 21125#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 21126#L15-1 [2020-10-19 18:43:28,659 INFO L796 eck$LassoCheckResult]: Loop: 21126#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21202#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21135#L12 assume !(main_~i~0 >= 10); 21136#L12-2 assume !(main_~i~0 <= 0); 21239#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21238#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21237#L12 assume !(main_~i~0 >= 10); 21236#L12-2 assume !(main_~i~0 <= 0); 21235#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21234#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21233#L12 assume !(main_~i~0 >= 10); 21232#L12-2 assume !(main_~i~0 <= 0); 21231#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21230#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21229#L12 assume !(main_~i~0 >= 10); 21228#L12-2 assume !(main_~i~0 <= 0); 21227#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21226#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21225#L12 assume !(main_~i~0 >= 10); 21224#L12-2 assume !(main_~i~0 <= 0); 21223#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21222#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21221#L12 assume !(main_~i~0 >= 10); 21215#L12-2 assume !(main_~i~0 <= 0); 21216#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21211#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21212#L12 assume !(main_~i~0 >= 10); 21217#L12-2 assume !(main_~i~0 <= 0); 21207#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21206#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21204#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 21203#L12-2 assume !(main_~i~0 <= 0); 21139#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21131#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21132#L12 assume !(main_~i~0 >= 10); 21205#L12-2 assume !(main_~i~0 <= 0); 21313#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21311#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21309#L12 assume !(main_~i~0 >= 10); 21307#L12-2 assume !(main_~i~0 <= 0); 21305#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21303#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21301#L12 assume !(main_~i~0 >= 10); 21300#L12-2 assume !(main_~i~0 <= 0); 21298#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21296#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21294#L12 assume !(main_~i~0 >= 10); 21292#L12-2 assume !(main_~i~0 <= 0); 21290#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21288#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21286#L12 assume !(main_~i~0 >= 10); 21284#L12-2 assume !(main_~i~0 <= 0); 21282#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21280#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21278#L12 assume !(main_~i~0 >= 10); 21276#L12-2 assume !(main_~i~0 <= 0); 21274#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21272#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21270#L12 assume !(main_~i~0 >= 10); 21268#L12-2 assume !(main_~i~0 <= 0); 21266#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21264#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21262#L12 assume !(main_~i~0 >= 10); 21260#L12-2 assume !(main_~i~0 <= 0); 21258#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21256#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21254#L12 assume !(main_~i~0 >= 10); 21253#L12-2 assume !(main_~i~0 <= 0); 21241#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21249#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21245#L12 assume !(main_~i~0 >= 10); 21240#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 21126#L15-1 [2020-10-19 18:43:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:28,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 8 times [2020-10-19 18:43:28,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:28,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738936337] [2020-10-19 18:43:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:28,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:28,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:28,675 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash 903675531, now seen corresponding path program 16 times [2020-10-19 18:43:28,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:28,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505195165] [2020-10-19 18:43:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:28,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:28,690 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:28,693 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash -950496084, now seen corresponding path program 15 times [2020-10-19 18:43:28,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:28,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427651731] [2020-10-19 18:43:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1091 proven. 105 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:28,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427651731] [2020-10-19 18:43:28,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775775032] [2020-10-19 18:43:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:28,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-10-19 18:43:28,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:43:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1091 proven. 105 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:28,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:28,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-19 18:43:28,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911314774] [2020-10-19 18:43:29,341 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 69 [2020-10-19 18:43:29,357 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:29,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:29,357 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:29,357 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:29,358 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:29,358 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,358 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:29,358 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:29,358 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration25_Loop [2020-10-19 18:43:29,358 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:29,358 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:29,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,425 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:29,426 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 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 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:29,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:29,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:29,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_27=1} Honda state: {v_rep~unnamed0~0~true_27=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:29,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:29,462 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 120 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 121 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 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:29,502 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:43:29,505 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:29,527 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:29,527 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:29,527 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:29,527 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:29,527 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:29,527 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,527 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:29,528 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:29,528 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration25_Loop [2020-10-19 18:43:29,528 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:29,528 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:29,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,540 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,545 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:29,615 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:29,615 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 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 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,619 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:29,620 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:29,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:29,621 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:29,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:29,622 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:43:29,622 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:43:29,625 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 123 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 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,649 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:29,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:29,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:29,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:29,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:29,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:29,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:29,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:43:29,654 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:29,655 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:43:29,656 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 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 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:29,659 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:29,659 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:29,659 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:29,659 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:43:29,679 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:43:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:29,814 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 10 loop predicates [2020-10-19 18:43:29,814 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 246 transitions. cyclomatic complexity: 37 Second operand 11 states. [2020-10-19 18:43:30,336 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 246 transitions. cyclomatic complexity: 37. Second operand 11 states. Result 1165 states and 1405 transitions. Complement of second has 39 states. [2020-10-19 18:43:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 1 stem states 18 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-19 18:43:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 90 transitions. [2020-10-19 18:43:30,338 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 90 transitions. Stem has 44 letters. Loop has 72 letters. [2020-10-19 18:43:30,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:30,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 90 transitions. Stem has 116 letters. Loop has 72 letters. [2020-10-19 18:43:30,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:30,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 90 transitions. Stem has 44 letters. Loop has 144 letters. [2020-10-19 18:43:30,341 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:30,341 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1165 states and 1405 transitions. [2020-10-19 18:43:30,346 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-10-19 18:43:30,350 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1165 states to 823 states and 971 transitions. [2020-10-19 18:43:30,350 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 202 [2020-10-19 18:43:30,351 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-19 18:43:30,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 823 states and 971 transitions. [2020-10-19 18:43:30,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:30,351 INFO L691 BuchiCegarLoop]: Abstraction has 823 states and 971 transitions. [2020-10-19 18:43:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states and 971 transitions. [2020-10-19 18:43:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 799. [2020-10-19 18:43:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-10-19 18:43:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 946 transitions. [2020-10-19 18:43:30,362 INFO L714 BuchiCegarLoop]: Abstraction has 799 states and 946 transitions. [2020-10-19 18:43:30,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:43:30,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:43:30,363 INFO L87 Difference]: Start difference. First operand 799 states and 946 transitions. Second operand 11 states. [2020-10-19 18:43:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:30,453 INFO L93 Difference]: Finished difference Result 308 states and 338 transitions. [2020-10-19 18:43:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:43:30,457 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 308 states and 338 transitions. [2020-10-19 18:43:30,459 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-10-19 18:43:30,461 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 308 states to 245 states and 275 transitions. [2020-10-19 18:43:30,461 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-19 18:43:30,461 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 159 [2020-10-19 18:43:30,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 245 states and 275 transitions. [2020-10-19 18:43:30,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:30,462 INFO L691 BuchiCegarLoop]: Abstraction has 245 states and 275 transitions. [2020-10-19 18:43:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states and 275 transitions. [2020-10-19 18:43:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2020-10-19 18:43:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:43:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2020-10-19 18:43:30,466 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 244 transitions. [2020-10-19 18:43:30,466 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 244 transitions. [2020-10-19 18:43:30,467 INFO L427 BuchiCegarLoop]: ======== Iteration 26============ [2020-10-19 18:43:30,467 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 244 transitions. [2020-10-19 18:43:30,468 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:30,468 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:30,468 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:30,469 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-10-19 18:43:30,469 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [19, 18, 18, 10, 9, 1, 1] [2020-10-19 18:43:30,469 INFO L794 eck$LassoCheckResult]: Stem: 24406#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 24407#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24417#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 24470#L12-2 assume !(main_~i~0 <= 0); 24469#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24468#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24466#L12 assume !(main_~i~0 >= 10); 24467#L12-2 assume !(main_~i~0 <= 0); 24596#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24594#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24413#L12 assume !(main_~i~0 >= 10); 24414#L12-2 assume !(main_~i~0 <= 0); 24476#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24474#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24475#L12 assume !(main_~i~0 >= 10); 24574#L12-2 assume !(main_~i~0 <= 0); 24572#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24570#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24568#L12 assume !(main_~i~0 >= 10); 24566#L12-2 assume !(main_~i~0 <= 0); 24564#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24562#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24560#L12 assume !(main_~i~0 >= 10); 24558#L12-2 assume !(main_~i~0 <= 0); 24556#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24554#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24552#L12 assume !(main_~i~0 >= 10); 24550#L12-2 assume !(main_~i~0 <= 0); 24548#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24546#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24544#L12 assume !(main_~i~0 >= 10); 24542#L12-2 assume !(main_~i~0 <= 0); 24540#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24538#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24536#L12 assume !(main_~i~0 >= 10); 24534#L12-2 assume !(main_~i~0 <= 0); 24532#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24530#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24523#L12 assume !(main_~i~0 >= 10); 24527#L12-2 assume !(main_~i~0 <= 0); 24526#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24522#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24519#L12 assume !(main_~i~0 >= 10); 24402#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 24403#L15-1 [2020-10-19 18:43:30,470 INFO L796 eck$LassoCheckResult]: Loop: 24403#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24408#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24409#L12 assume !(main_~i~0 >= 10); 24412#L12-2 assume !(main_~i~0 <= 0); 24514#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24513#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24512#L12 assume !(main_~i~0 >= 10); 24511#L12-2 assume !(main_~i~0 <= 0); 24510#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24509#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24508#L12 assume !(main_~i~0 >= 10); 24507#L12-2 assume !(main_~i~0 <= 0); 24506#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24505#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24504#L12 assume !(main_~i~0 >= 10); 24503#L12-2 assume !(main_~i~0 <= 0); 24502#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24501#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24500#L12 assume !(main_~i~0 >= 10); 24499#L12-2 assume !(main_~i~0 <= 0); 24498#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24497#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24496#L12 assume !(main_~i~0 >= 10); 24495#L12-2 assume !(main_~i~0 <= 0); 24494#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24493#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24492#L12 assume !(main_~i~0 >= 10); 24490#L12-2 assume !(main_~i~0 <= 0); 24488#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24489#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24484#L12 assume !(main_~i~0 >= 10); 24485#L12-2 assume !(main_~i~0 <= 0); 24482#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24481#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24478#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 24477#L12-2 assume !(main_~i~0 <= 0); 24415#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24416#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24479#L12 assume !(main_~i~0 >= 10); 24480#L12-2 assume !(main_~i~0 <= 0); 24588#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24586#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24584#L12 assume !(main_~i~0 >= 10); 24582#L12-2 assume !(main_~i~0 <= 0); 24580#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24578#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24576#L12 assume !(main_~i~0 >= 10); 24575#L12-2 assume !(main_~i~0 <= 0); 24573#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24571#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24569#L12 assume !(main_~i~0 >= 10); 24567#L12-2 assume !(main_~i~0 <= 0); 24565#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24563#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24561#L12 assume !(main_~i~0 >= 10); 24559#L12-2 assume !(main_~i~0 <= 0); 24557#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24555#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24553#L12 assume !(main_~i~0 >= 10); 24551#L12-2 assume !(main_~i~0 <= 0); 24549#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24547#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24545#L12 assume !(main_~i~0 >= 10); 24543#L12-2 assume !(main_~i~0 <= 0); 24541#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24539#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24537#L12 assume !(main_~i~0 >= 10); 24535#L12-2 assume !(main_~i~0 <= 0); 24533#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24531#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24529#L12 assume !(main_~i~0 >= 10); 24528#L12-2 assume !(main_~i~0 <= 0); 24516#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24524#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24520#L12 assume !(main_~i~0 >= 10); 24515#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 24403#L15-1 [2020-10-19 18:43:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 9 times [2020-10-19 18:43:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:30,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969246108] [2020-10-19 18:43:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:30,476 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:30,481 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:30,482 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash -917947454, now seen corresponding path program 17 times [2020-10-19 18:43:30,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:30,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911281847] [2020-10-19 18:43:30,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:30,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:30,497 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:30,500 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1759172963, now seen corresponding path program 16 times [2020-10-19 18:43:30,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:30,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030916726] [2020-10-19 18:43:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1175 proven. 136 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:30,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030916726] [2020-10-19 18:43:30,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076742419] [2020-10-19 18:43:30,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:43:30,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:43:30,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:43:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:43:30,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1175 proven. 136 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-19 18:43:30,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:43:30,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-19 18:43:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667696720] [2020-10-19 18:43:31,270 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 74 [2020-10-19 18:43:31,296 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:31,297 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:31,297 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:31,297 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:31,297 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:43:31,297 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:31,297 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:31,297 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:31,297 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration26_Loop [2020-10-19 18:43:31,298 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:31,298 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:31,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,388 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:31,389 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:31,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:31,392 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:31,398 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:43:31,399 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_29=1} Honda state: {v_rep~unnamed0~0~true_29=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:31,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:43:31,457 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 127 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 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:31,542 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:43:31,542 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:31,552 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:43:31,609 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:43:31,609 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:43:31,609 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:43:31,610 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:43:31,610 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:43:31,610 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:31,610 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:43:31,610 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:43:31,610 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration26_Loop [2020-10-19 18:43:31,611 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:43:31,611 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:43:31,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:43:31,700 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:43:31,700 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:31,705 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:43:31,707 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:43:31,707 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:43:31,707 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:43:31,707 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:43:31,707 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:43:31,708 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:43:31,709 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:31,711 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:43:31,714 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:43:31,714 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:43:31,717 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:43:31,718 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:43:31,718 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:43:31,718 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:43:31,780 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:43:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:43:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:43:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 18:43:31,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:43:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-19 18:43:32,000 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 11 loop predicates [2020-10-19 18:43:32,000 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 244 transitions. cyclomatic complexity: 35 Second operand 12 states. [2020-10-19 18:43:32,610 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 244 transitions. cyclomatic complexity: 35. Second operand 12 states. Result 1239 states and 1496 transitions. Complement of second has 43 states. [2020-10-19 18:43:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 22 states 1 stem states 20 non-accepting loop states 1 accepting loop states [2020-10-19 18:43:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 18:43:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 97 transitions. [2020-10-19 18:43:32,612 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 97 transitions. Stem has 44 letters. Loop has 76 letters. [2020-10-19 18:43:32,612 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:32,612 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 97 transitions. Stem has 120 letters. Loop has 76 letters. [2020-10-19 18:43:32,613 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:32,613 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 97 transitions. Stem has 44 letters. Loop has 152 letters. [2020-10-19 18:43:32,614 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:43:32,614 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1239 states and 1496 transitions. [2020-10-19 18:43:32,621 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:32,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1239 states to 787 states and 932 transitions. [2020-10-19 18:43:32,626 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 168 [2020-10-19 18:43:32,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 172 [2020-10-19 18:43:32,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 787 states and 932 transitions. [2020-10-19 18:43:32,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:32,626 INFO L691 BuchiCegarLoop]: Abstraction has 787 states and 932 transitions. [2020-10-19 18:43:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states and 932 transitions. [2020-10-19 18:43:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 401. [2020-10-19 18:43:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-19 18:43:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 456 transitions. [2020-10-19 18:43:32,636 INFO L714 BuchiCegarLoop]: Abstraction has 401 states and 456 transitions. [2020-10-19 18:43:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:43:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:43:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:43:32,637 INFO L87 Difference]: Start difference. First operand 401 states and 456 transitions. Second operand 12 states. [2020-10-19 18:43:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:43:32,780 INFO L93 Difference]: Finished difference Result 405 states and 418 transitions. [2020-10-19 18:43:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:43:32,780 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 405 states and 418 transitions. [2020-10-19 18:43:32,782 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:32,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 405 states to 292 states and 305 transitions. [2020-10-19 18:43:32,784 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 178 [2020-10-19 18:43:32,785 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 284 [2020-10-19 18:43:32,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 305 transitions. [2020-10-19 18:43:32,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:43:32,785 INFO L691 BuchiCegarLoop]: Abstraction has 292 states and 305 transitions. [2020-10-19 18:43:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 305 transitions. [2020-10-19 18:43:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 169. [2020-10-19 18:43:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-19 18:43:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2020-10-19 18:43:32,789 INFO L714 BuchiCegarLoop]: Abstraction has 169 states and 182 transitions. [2020-10-19 18:43:32,789 INFO L594 BuchiCegarLoop]: Abstraction has 169 states and 182 transitions. [2020-10-19 18:43:32,789 INFO L427 BuchiCegarLoop]: ======== Iteration 27============ [2020-10-19 18:43:32,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 169 states and 182 transitions. [2020-10-19 18:43:32,790 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-10-19 18:43:32,790 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:43:32,790 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:43:32,791 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-10-19 18:43:32,791 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [20, 19, 19, 10, 10, 1, 1] [2020-10-19 18:43:32,791 INFO L794 eck$LassoCheckResult]: Stem: 27489#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 27490#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27495#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 27487#L12-2 assume !(main_~i~0 <= 0); 27488#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27493#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27494#L12 assume !(main_~i~0 >= 10); 27485#L12-2 [2020-10-19 18:43:32,791 INFO L796 eck$LassoCheckResult]: Loop: 27485#L12-2 assume !(main_~i~0 <= 0); 27486#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27615#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27614#L12 assume !(main_~i~0 >= 10); 27613#L12-2 assume !(main_~i~0 <= 0); 27612#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27611#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27610#L12 assume !(main_~i~0 >= 10); 27609#L12-2 assume !(main_~i~0 <= 0); 27608#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27607#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27606#L12 assume !(main_~i~0 >= 10); 27605#L12-2 assume !(main_~i~0 <= 0); 27604#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27603#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27602#L12 assume !(main_~i~0 >= 10); 27601#L12-2 assume !(main_~i~0 <= 0); 27600#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27599#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27598#L12 assume !(main_~i~0 >= 10); 27597#L12-2 assume !(main_~i~0 <= 0); 27596#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27595#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27594#L12 assume !(main_~i~0 >= 10); 27593#L12-2 assume !(main_~i~0 <= 0); 27592#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27591#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27590#L12 assume !(main_~i~0 >= 10); 27589#L12-2 assume !(main_~i~0 <= 0); 27588#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27587#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27586#L12 assume !(main_~i~0 >= 10); 27585#L12-2 assume !(main_~i~0 <= 0); 27584#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27583#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27582#L12 assume !(main_~i~0 >= 10); 27580#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 27579#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27491#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27492#L12 assume !(main_~i~0 >= 10); 27496#L12-2 assume !(main_~i~0 <= 0); 27581#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27653#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27652#L12 assume !(main_~i~0 >= 10); 27651#L12-2 assume !(main_~i~0 <= 0); 27650#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27649#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27648#L12 assume !(main_~i~0 >= 10); 27647#L12-2 assume !(main_~i~0 <= 0); 27646#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27645#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27644#L12 assume !(main_~i~0 >= 10); 27643#L12-2 assume !(main_~i~0 <= 0); 27642#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27641#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27640#L12 assume !(main_~i~0 >= 10); 27639#L12-2 assume !(main_~i~0 <= 0); 27638#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27637#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27636#L12 assume !(main_~i~0 >= 10); 27635#L12-2 assume !(main_~i~0 <= 0); 27634#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27633#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27632#L12 assume !(main_~i~0 >= 10); 27631#L12-2 assume !(main_~i~0 <= 0); 27630#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27629#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27628#L12 assume !(main_~i~0 >= 10); 27627#L12-2 assume !(main_~i~0 <= 0); 27626#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27625#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27624#L12 assume !(main_~i~0 >= 10); 27623#L12-2 assume !(main_~i~0 <= 0); 27622#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27621#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27616#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 27617#L12-2 assume !(main_~i~0 <= 0); 27497#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27498#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27620#L12 assume !(main_~i~0 >= 10); 27485#L12-2 [2020-10-19 18:43:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1365704114, now seen corresponding path program 1 times [2020-10-19 18:43:32,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:32,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589228079] [2020-10-19 18:43:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:32,796 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:32,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:32,799 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1260641161, now seen corresponding path program 18 times [2020-10-19 18:43:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064019035] [2020-10-19 18:43:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:32,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:32,816 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:32,820 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:43:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash -689456170, now seen corresponding path program 17 times [2020-10-19 18:43:32,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:43:32,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383649193] [2020-10-19 18:43:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:43:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:32,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:43:32,839 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:43:32,842 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:43:33,470 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 78 [2020-10-19 18:43:33,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:43:33 BoogieIcfgContainer [2020-10-19 18:43:33,557 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:43:33,558 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:43:33,558 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:43:33,558 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:43:33,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:43:12" (3/4) ... [2020-10-19 18:43:33,563 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:43:33,624 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:43:33,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:43:33,625 INFO L168 Benchmark]: Toolchain (without parser) took 21796.58 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 520.6 MB). Free memory was 958.6 MB in the beginning and 1.5 GB in the end (delta: -525.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:43:33,626 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:43:33,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.01 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:43:33,626 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.40 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:43:33,627 INFO L168 Benchmark]: Boogie Preprocessor took 77.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:43:33,627 INFO L168 Benchmark]: RCFGBuilder took 214.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:43:33,628 INFO L168 Benchmark]: BuchiAutomizer took 21162.78 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 390.1 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -378.5 MB). Peak memory consumption was 695.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:43:33,628 INFO L168 Benchmark]: Witness Printer took 66.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 303.3 kB). Peak memory consumption was 303.3 kB. Max. memory is 11.5 GB. [2020-10-19 18:43:33,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 235.01 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.40 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 77.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 214.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21162.78 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 390.1 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -378.5 MB). Peak memory consumption was 695.2 MB. Max. memory is 11.5 GB. * Witness Printer took 66.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 303.3 kB). Peak memory consumption was 303.3 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 37 terminating modules (22 trivial, 14 deterministic, 1 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 1 and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 17 and consists of 4 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -1 * i and consists of 4 locations. One deterministic module has affine ranking function i and consists of 8 locations. One deterministic module has affine ranking function i and consists of 10 locations. One deterministic module has affine ranking function i and consists of 12 locations. One deterministic module has affine ranking function i and consists of 14 locations. One deterministic module has affine ranking function i and consists of 16 locations. One deterministic module has affine ranking function i and consists of 18 locations. One deterministic module has affine ranking function i and consists of 20 locations. One deterministic module has affine ranking function i and consists of 22 locations. One nondeterministic module has affine ranking function -2 * i + 17 and consists of 4 locations. 22 modules have a trivial ranking function, the largest among these consists of 12 locations. The remainder module has 169 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.0s and 27 iterations. TraceHistogramMax:20. Analysis of lassos took 14.1s. Construction of modules took 2.0s. Büchi inclusion checks took 4.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 36. Automata minimization 0.2s AutomataMinimizationTime, 37 MinimizatonAttempts, 1211 StatesRemovedByMinimization, 36 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 214 states and ocurred in iteration 18. Nontrivial modules had stage [14, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1520/3680 HoareTripleCheckerStatistics: 266 SDtfs, 767 SDslu, 9 SDs, 0 SdLazy, 2635 SolverSat, 277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT4 conc0 concLT10 SILN0 SILU0 SILI9 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax160 hnf96 lsp44 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq127 hnf96 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 26ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 15 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {up=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1880fc09=0, \result=0, i=9} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 11]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int up; [L8] i = __VERIFIER_nondet_int() [L9] up = 0 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND TRUE i >= 10 [L13] up = 0 [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) Loop: [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND TRUE i <= 0 [L16] up = 1 [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) [L15] COND FALSE !(i <= 0) [L18] COND TRUE up >= 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND TRUE i >= 10 [L13] up = 0 [L15] COND FALSE !(i <= 0) [L18] COND FALSE !(up >= 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i >= 10) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...