./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.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-crafted/Nyala-2lex-2.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 054e86c0b11592f66f6efc3e0f84c6f8bee49b59 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:40:20,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:40:20,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:40:20,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:40:20,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:40:20,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:40:20,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:40:20,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:40:20,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:40:20,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:40:20,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:40:20,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:40:20,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:40:20,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:40:20,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:40:20,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:40:20,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:40:20,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:40:20,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:40:20,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:40:20,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:40:20,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:40:20,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:40:20,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:40:20,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:40:20,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:40:20,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:40:20,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:40:20,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:40:20,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:40:20,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:40:20,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:40:20,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:40:20,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:40:20,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:40:20,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:40:20,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:40:20,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:40:20,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:40:20,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:40:20,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:40:20,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:40:20,422 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:40:20,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:40:20,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:40:20,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:40:20,424 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:40:20,425 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:40:20,425 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:40:20,425 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:40:20,425 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:40:20,426 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:40:20,426 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:40:20,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:40:20,426 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:40:20,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:40:20,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:40:20,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:40:20,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:40:20,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:40:20,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:40:20,428 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:40:20,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:40:20,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:40:20,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:40:20,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:40:20,429 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:40:20,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:40:20,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:40:20,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:40:20,430 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:40:20,431 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:40:20,431 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 -> 054e86c0b11592f66f6efc3e0f84c6f8bee49b59 [2020-10-19 18:40:20,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:40:20,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:40:20,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:40:20,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:40:20,808 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:40:20,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c [2020-10-19 18:40:20,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851f28b75/8d4657335fc74b9fa015e51b25c73399/FLAG2496cf170 [2020-10-19 18:40:21,294 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:40:21,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c [2020-10-19 18:40:21,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851f28b75/8d4657335fc74b9fa015e51b25c73399/FLAG2496cf170 [2020-10-19 18:40:21,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851f28b75/8d4657335fc74b9fa015e51b25c73399 [2020-10-19 18:40:21,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:40:21,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:40:21,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:40:21,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:40:21,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:40:21,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29823516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21, skipping insertion in model container [2020-10-19 18:40:21,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:40:21,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:40:21,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:40:21,893 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:40:21,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:40:21,927 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:40:21,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21 WrapperNode [2020-10-19 18:40:21,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:40:21,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:40:21,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:40:21,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:40:21,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:40:21,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:40:21,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:40:21,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:40:21,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:21,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:22,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:22,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (1/1) ... [2020-10-19 18:40:22,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:40:22,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:40:22,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:40:22,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:40:22,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (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 18:40:22,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:40:22,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:40:22,272 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:40:22,272 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-19 18:40:22,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:22 BoogieIcfgContainer [2020-10-19 18:40:22,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:40:22,275 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:40:22,275 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:40:22,279 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:40:22,280 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:22,280 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:40:21" (1/3) ... [2020-10-19 18:40:22,282 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5de35b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:40:22, skipping insertion in model container [2020-10-19 18:40:22,282 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:22,282 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:21" (2/3) ... [2020-10-19 18:40:22,282 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5de35b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:40:22, skipping insertion in model container [2020-10-19 18:40:22,283 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:22,283 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:22" (3/3) ... [2020-10-19 18:40:22,286 INFO L373 chiAutomizerObserver]: Analyzing ICFG Nyala-2lex-2.c [2020-10-19 18:40:22,335 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:40:22,335 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:40:22,335 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:40:22,335 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:40:22,336 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:40:22,336 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:40:22,336 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:40:22,336 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:40:22,349 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-10-19 18:40:22,370 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:40:22,370 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:22,370 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:22,376 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:40:22,376 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:40:22,376 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:40:22,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-10-19 18:40:22,377 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:40:22,378 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:22,378 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:22,378 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:40:22,378 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:40:22,385 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L21-2true [2020-10-19 18:40:22,385 INFO L796 eck$LassoCheckResult]: Loop: 8#L21-2true assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 4#L21true assume main_~y~0 < 0;main_~x~0 := main_~x~0 - 1;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; 8#L21-2true [2020-10-19 18:40:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:22,391 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-19 18:40:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:22,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104682932] [2020-10-19 18:40:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:22,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:22,482 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:22,501 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-10-19 18:40:22,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:22,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943894298] [2020-10-19 18:40:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:22,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:22,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:22,525 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-10-19 18:40:22,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:22,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818046843] [2020-10-19 18:40:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:22,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:22,543 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:22,545 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:22,649 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:22,650 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:22,650 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:22,650 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:22,650 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:22,650 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:22,651 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:22,651 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:22,651 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration1_Loop [2020-10-19 18:40:22,651 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:22,651 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:22,682 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 18:40:22,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:22,706 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 18:40:22,725 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 18:40:22,846 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:22,847 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 18:40:22,880 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:22,882 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:22,892 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:22,893 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 18:40:22,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:22,922 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:22,932 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:22,933 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:22,964 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:22,964 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:22,970 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:22,970 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0=0, ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_~y~0=0, ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:23,001 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:23,033 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:23,063 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:40:23,065 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:23,065 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:23,065 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:23,066 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:23,066 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:40:23,067 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,068 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:23,068 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:23,068 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration1_Loop [2020-10-19 18:40:23,069 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:23,069 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:23,077 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 18:40:23,093 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 18:40:23,117 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 18:40:23,134 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 18:40:23,212 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:23,218 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) [2020-10-19 18:40:23,236 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 18:40:23,240 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:23,240 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:23,241 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:23,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:23,248 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:40:23,248 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,259 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 18:40:23,307 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 18:40:23,310 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:23,310 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:23,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:23,311 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:23,315 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:40:23,316 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,322 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 18:40:23,364 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 18:40:23,366 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:23,367 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:23,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:23,368 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:23,368 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,371 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:23,373 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:23,376 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 18:40:23,414 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 18:40:23,417 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:23,418 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:23,418 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:23,418 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:23,418 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:23,422 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:23,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:23,428 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:40:23,440 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:40:23,441 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,446 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:40:23,447 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:40:23,447 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:40:23,448 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2020-10-19 18:40:23,484 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:40:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:40:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:40:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:23,558 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 18:40:23,578 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 18:40:23,579 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2020-10-19 18:40:23,645 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 28 states and 35 transitions. Complement of second has 7 states. [2020-10-19 18:40:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:40:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:40:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-10-19 18:40:23,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 1 letters. Loop has 2 letters. [2020-10-19 18:40:23,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:23,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-19 18:40:23,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:23,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 1 letters. Loop has 4 letters. [2020-10-19 18:40:23,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:23,654 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 35 transitions. [2020-10-19 18:40:23,658 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:40:23,662 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 8 states and 11 transitions. [2020-10-19 18:40:23,664 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-19 18:40:23,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-19 18:40:23,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2020-10-19 18:40:23,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:40:23,665 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-10-19 18:40:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2020-10-19 18:40:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-10-19 18:40:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:40:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-10-19 18:40:23,697 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:40:23,697 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:40:23,697 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:40:23,698 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-10-19 18:40:23,698 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:40:23,698 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:23,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:23,699 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:40:23,699 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:40:23,699 INFO L794 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 77#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 71#L21 [2020-10-19 18:40:23,700 INFO L796 eck$LassoCheckResult]: Loop: 71#L21 assume !(main_~y~0 < 0); 72#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 71#L21 [2020-10-19 18:40:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-19 18:40:23,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:23,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472124845] [2020-10-19 18:40:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:23,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:23,711 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:23,712 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:23,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2020-10-19 18:40:23,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:23,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104543383] [2020-10-19 18:40:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:23,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:23,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:23,723 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 1 times [2020-10-19 18:40:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:23,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402519112] [2020-10-19 18:40:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:23,731 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:23,736 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:23,737 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:23,766 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:23,766 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:23,766 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:23,766 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:23,766 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:23,767 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,767 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:23,767 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:23,767 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration2_Loop [2020-10-19 18:40:23,767 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:23,767 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:23,769 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 18:40:23,773 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 18:40:23,778 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 18:40:23,782 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 18:40:23,848 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:23,849 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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,853 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:23,854 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:23,859 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:23,859 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 18:40:23,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:23,907 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 18:40:23,912 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:23,912 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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:23,954 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:23,954 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:40:23,958 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:40:23,959 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~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 18:40:24,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:24,007 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 18:40:24,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:24,058 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 18:40:24,105 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:40:24,108 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:24,108 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:24,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:24,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:24,109 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:40:24,109 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:24,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:24,109 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration2_Loop [2020-10-19 18:40:24,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:24,110 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:24,112 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 18:40:24,117 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 18:40:24,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:40:24,125 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 18:40:24,175 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:24,176 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 18:40:24,191 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:40:24,193 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:24,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:24,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:24,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:24,197 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:40:24,198 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 18:40:24,204 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 18:40:24,252 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 18:40:24,255 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:24,255 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:24,255 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:24,256 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:24,259 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:40:24,259 INFO L402 nArgumentSynthesizer]: A total of 2 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 18:40:24,264 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) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,298 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 18:40:24,300 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:24,300 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:24,300 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:24,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:24,300 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:24,301 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:24,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:24,303 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,328 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 18:40:24,330 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:24,331 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:24,331 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:24,331 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:24,331 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:24,333 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:24,333 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:40:24,338 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:40:24,349 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:40:24,349 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:24,368 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:40:24,368 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:40:24,369 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:40:24,369 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,402 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:40:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,450 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 18:40:24,451 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 18:40:24,451 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-19 18:40:24,465 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 14 states and 19 transitions. Complement of second has 5 states. [2020-10-19 18:40:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:40:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:40:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2020-10-19 18:40:24,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 2 letters. [2020-10-19 18:40:24,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:24,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:40:24,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:24,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 4 letters. [2020-10-19 18:40:24,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:24,469 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 19 transitions. [2020-10-19 18:40:24,470 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:40:24,470 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 9 states and 12 transitions. [2020-10-19 18:40:24,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-19 18:40:24,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-10-19 18:40:24,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2020-10-19 18:40:24,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:40:24,471 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2020-10-19 18:40:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2020-10-19 18:40:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2020-10-19 18:40:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:40:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2020-10-19 18:40:24,473 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2020-10-19 18:40:24,473 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2020-10-19 18:40:24,473 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:40:24,473 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2020-10-19 18:40:24,474 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 18:40:24,474 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:24,474 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:24,475 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2020-10-19 18:40:24,475 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 18:40:24,475 INFO L794 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 131#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 127#L21 assume main_~y~0 < 0;main_~x~0 := main_~x~0 - 1;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; 128#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 125#L21 [2020-10-19 18:40:24,475 INFO L796 eck$LassoCheckResult]: Loop: 125#L21 assume !(main_~y~0 < 0); 126#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 125#L21 [2020-10-19 18:40:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2020-10-19 18:40:24,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:24,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415355995] [2020-10-19 18:40:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:24,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:24,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:24,492 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2020-10-19 18:40:24,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:24,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72474022] [2020-10-19 18:40:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:24,497 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:24,500 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:24,501 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 1 times [2020-10-19 18:40:24,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:24,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486265608] [2020-10-19 18:40:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:24,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:24,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:24,520 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:24,546 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:24,546 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:24,547 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:24,547 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:24,547 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:40:24,547 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,547 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:24,547 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:24,548 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration3_Loop [2020-10-19 18:40:24,548 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:24,548 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:24,549 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 18:40:24,556 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 18:40:24,560 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 18:40:24,564 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 18:40:24,608 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:24,608 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) [2020-10-19 18:40:24,620 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:40:24,620 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:24,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:40:24,674 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 [2020-10-19 18:40:24,719 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:40:24,722 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:40:24,722 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:40:24,722 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:40:24,723 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:40:24,723 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:40:24,723 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,723 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:40:24,723 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:40:24,724 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration3_Loop [2020-10-19 18:40:24,724 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:40:24,724 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:40:24,725 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 18:40:24,733 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 18:40:24,737 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 18:40:24,741 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 18:40:24,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:40:24,789 INFO L489 LassoAnalysis]: Using template 'affine'. 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 18:40:24,795 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 18:40:24,797 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:40:24,797 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:40:24,797 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:40:24,798 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:40:24,798 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:40:24,799 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:40:24,799 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,802 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:40:24,805 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:40:24,805 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:40:24,809 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:40:24,809 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:40:24,809 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:40:24,810 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:40:24,846 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:40:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,885 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 18:40:24,886 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 18:40:24,886 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 18:40:24,901 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 5 states. [2020-10-19 18:40:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:40:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:40:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2020-10-19 18:40:24,903 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:40:24,903 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:24,904 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:40:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,944 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 18:40:24,944 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 18:40:24,945 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 18:40:24,958 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 5 states. [2020-10-19 18:40:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:40:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:40:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2020-10-19 18:40:24,960 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:40:24,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:24,960 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:40:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:40:24,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:40:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:40:25,002 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 18:40:25,002 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 18:40:25,002 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 18:40:25,017 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 4 states. [2020-10-19 18:40:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:40:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:40:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-10-19 18:40:25,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 18:40:25,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:25,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2020-10-19 18:40:25,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:25,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2020-10-19 18:40:25,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:40:25,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 13 transitions. [2020-10-19 18:40:25,021 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:40:25,021 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 0 states and 0 transitions. [2020-10-19 18:40:25,021 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:40:25,022 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:40:25,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:40:25,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:40:25,022 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:40:25,022 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:40:25,022 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:40:25,022 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:40:25,023 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:40:25,023 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:40:25,023 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 18:40:25,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:40:25 BoogieIcfgContainer [2020-10-19 18:40:25,032 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:40:25,032 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:40:25,032 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:40:25,033 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:40:25,033 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:22" (3/4) ... [2020-10-19 18:40:25,038 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:40:25,038 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:40:25,041 INFO L168 Benchmark]: Toolchain (without parser) took 3389.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 958.6 MB in the beginning and 770.8 MB in the end (delta: 187.8 MB). Peak memory consumption was 289.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:25,042 INFO L168 Benchmark]: CDTParser took 0.31 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 18:40:25,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.89 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 18:40:25,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.85 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 18:40:25,045 INFO L168 Benchmark]: Boogie Preprocessor took 78.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -149.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:25,046 INFO L168 Benchmark]: RCFGBuilder took 231.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:25,046 INFO L168 Benchmark]: BuchiAutomizer took 2757.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 770.8 MB in the end (delta: 300.8 MB). Peak memory consumption was 300.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:25,047 INFO L168 Benchmark]: Witness Printer took 6.08 ms. Allocated memory is still 1.1 GB. Free memory is still 770.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:25,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 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 271.89 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 32.85 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 78.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -149.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 231.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2757.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 770.8 MB in the end (delta: 300.8 MB). Peak memory consumption was 300.8 MB. Max. memory is 11.5 GB. * Witness Printer took 6.08 ms. Allocated memory is still 1.1 GB. Free memory is still 770.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.7s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 18 SDtfs, 18 SDslu, 10 SDs, 0 SdLazy, 36 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax182 hnf100 lsp38 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie101 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 39ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...