./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/Ex06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/Ex06.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 3ac2445d235ff9d71a6974ac9afce215f9983492 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:42:16,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:42:16,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:42:16,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:42:16,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:42:16,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:42:16,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:42:16,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:42:16,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:42:16,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:42:16,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:42:16,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:42:16,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:42:16,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:42:16,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:42:16,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:42:16,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:42:16,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:42:16,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:42:16,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:42:16,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:42:16,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:42:16,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:42:16,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:42:16,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:42:16,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:42:16,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:42:16,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:42:16,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:42:16,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:42:16,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:42:16,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:42:16,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:42:16,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:42:16,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:42:16,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:42:16,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:42:16,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:42:16,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:42:16,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:42:16,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:42:16,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:42:16,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:42:16,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:42:16,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:42:16,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:42:16,405 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:42:16,405 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:42:16,405 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:42:16,405 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:42:16,406 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:42:16,406 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:42:16,407 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:42:16,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:42:16,408 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:42:16,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:42:16,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:42:16,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:42:16,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:42:16,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:42:16,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:42:16,410 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:42:16,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:42:16,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:42:16,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:42:16,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:42:16,411 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:42:16,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:42:16,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:42:16,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:42:16,412 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:42:16,413 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:42:16,414 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 -> 3ac2445d235ff9d71a6974ac9afce215f9983492 [2020-10-19 18:42:16,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:42:16,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:42:16,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:42:16,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:42:16,772 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:42:16,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Ex06.c [2020-10-19 18:42:16,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0852aa048/e49d7731f2f94242ae1711d49a86f123/FLAG4937f32bb [2020-10-19 18:42:17,286 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:42:17,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Ex06.c [2020-10-19 18:42:17,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0852aa048/e49d7731f2f94242ae1711d49a86f123/FLAG4937f32bb [2020-10-19 18:42:17,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0852aa048/e49d7731f2f94242ae1711d49a86f123 [2020-10-19 18:42:17,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:42:17,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:42:17,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:42:17,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:42:17,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:42:17,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:17,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602ab9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17, skipping insertion in model container [2020-10-19 18:42:17,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:17,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:42:17,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:42:17,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:42:17,948 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:42:17,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:42:17,982 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:42:17,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17 WrapperNode [2020-10-19 18:42:17,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:42:17,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:42:17,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:42:17,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:42:17,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:17,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:42:18,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:42:18,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:42:18,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:42:18,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (1/1) ... [2020-10-19 18:42:18,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:42:18,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:42:18,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:42:18,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:42:18,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (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 18:42:18,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:42:18,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:42:18,299 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:42:18,299 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-19 18:42:18,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:42:18 BoogieIcfgContainer [2020-10-19 18:42:18,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:42:18,301 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:42:18,301 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:42:18,305 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:42:18,306 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:42:18,306 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:42:17" (1/3) ... [2020-10-19 18:42:18,307 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3919ecc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:42:18, skipping insertion in model container [2020-10-19 18:42:18,307 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:42:18,307 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:42:17" (2/3) ... [2020-10-19 18:42:18,308 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3919ecc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:42:18, skipping insertion in model container [2020-10-19 18:42:18,308 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:42:18,308 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:42:18" (3/3) ... [2020-10-19 18:42:18,310 INFO L373 chiAutomizerObserver]: Analyzing ICFG Ex06.c [2020-10-19 18:42:18,354 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:42:18,355 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:42:18,355 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:42:18,355 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:42:18,355 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:42:18,355 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:42:18,355 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:42:18,355 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:42:18,367 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-19 18:42:18,387 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:42:18,387 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:18,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:18,393 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:42:18,394 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:42:18,394 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:42:18,394 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-10-19 18:42:18,395 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:42:18,395 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:18,395 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:18,395 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:42:18,395 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:42:18,401 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 5#L13-1true [2020-10-19 18:42:18,402 INFO L796 eck$LassoCheckResult]: Loop: 5#L13-1true assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 3#L10true assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 9#L10-2true assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 5#L13-1true [2020-10-19 18:42:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-19 18:42:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:18,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82367827] [2020-10-19 18:42:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,490 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,512 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash 39823, now seen corresponding path program 1 times [2020-10-19 18:42:18,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:18,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136249796] [2020-10-19 18:42:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:18,590 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 18:42:18,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136249796] [2020-10-19 18:42:18,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:42:18,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:42:18,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054833625] [2020-10-19 18:42:18,599 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:42:18,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:42:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:42:18,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:42:18,626 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-10-19 18:42:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:42:18,722 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-10-19 18:42:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:42:18,725 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 18 transitions. [2020-10-19 18:42:18,727 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-19 18:42:18,731 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 7 states and 10 transitions. [2020-10-19 18:42:18,733 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 18:42:18,733 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-19 18:42:18,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-10-19 18:42:18,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:42:18,735 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:42:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-10-19 18:42:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-19 18:42:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 18:42:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-10-19 18:42:18,766 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:42:18,767 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-19 18:42:18,767 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:42:18,767 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-10-19 18:42:18,768 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-19 18:42:18,768 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:18,768 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:18,768 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-19 18:42:18,768 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:42:18,769 INFO L794 eck$LassoCheckResult]: Stem: 35#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 36#L13-1 [2020-10-19 18:42:18,769 INFO L796 eck$LassoCheckResult]: Loop: 36#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 32#L10 assume !(main_~i~0 > 0); 34#L10-2 assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 36#L13-1 [2020-10-19 18:42:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-10-19 18:42:18,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:18,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806414841] [2020-10-19 18:42:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,776 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,777 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 39885, now seen corresponding path program 1 times [2020-10-19 18:42:18,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:18,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273081604] [2020-10-19 18:42:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,784 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,788 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,789 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2020-10-19 18:42:18,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:18,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949502192] [2020-10-19 18:42:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,796 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:18,800 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:18,807 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:18,861 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:18,862 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:18,862 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:18,862 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:18,862 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:42:18,863 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:18,863 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:18,863 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:18,863 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration2_Loop [2020-10-19 18:42:18,863 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:18,864 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:18,886 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 18:42:18,912 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 18:42:18,919 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 18:42:18,996 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:18,997 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:19,003 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:19,004 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,042 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:42:19,042 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:42:19,056 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:42:19,079 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:19,079 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:19,079 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:19,079 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:19,079 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:42:19,079 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,080 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:19,080 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:19,080 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration2_Loop [2020-10-19 18:42:19,080 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:19,080 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:19,082 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 18:42:19,094 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 18:42:19,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:19,150 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:19,156 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:19,167 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 18:42:19,170 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:19,170 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:42:19,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:19,171 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:19,172 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:19,175 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:42:19,175 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,179 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:42:19,191 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:42:19,192 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:19,200 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:42:19,200 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:42:19,201 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:42:19,202 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,240 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:42:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:19,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:42:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:19,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:42:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:42:19,299 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 18:42:19,300 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-19 18:42:19,356 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 16 states and 22 transitions. Complement of second has 5 states. [2020-10-19 18:42:19,357 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 18:42:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:42:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-10-19 18:42:19,360 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 3 letters. [2020-10-19 18:42:19,362 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:19,362 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 4 letters. Loop has 3 letters. [2020-10-19 18:42:19,362 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:19,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 1 letters. Loop has 6 letters. [2020-10-19 18:42:19,363 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:19,363 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2020-10-19 18:42:19,365 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-19 18:42:19,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 18 transitions. [2020-10-19 18:42:19,368 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-19 18:42:19,368 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-10-19 18:42:19,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2020-10-19 18:42:19,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:42:19,369 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2020-10-19 18:42:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2020-10-19 18:42:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2020-10-19 18:42:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 18:42:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2020-10-19 18:42:19,372 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-10-19 18:42:19,373 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-10-19 18:42:19,373 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:42:19,373 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2020-10-19 18:42:19,374 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:42:19,374 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:19,375 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:19,375 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:42:19,375 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:42:19,376 INFO L794 eck$LassoCheckResult]: Stem: 91#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 92#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 87#L10 [2020-10-19 18:42:19,376 INFO L796 eck$LassoCheckResult]: Loop: 87#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 88#L10-2 assume !(main_~i~0 < 0); 93#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 87#L10 [2020-10-19 18:42:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-19 18:42:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:19,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513510731] [2020-10-19 18:42:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:19,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:19,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:19,386 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash 42945, now seen corresponding path program 1 times [2020-10-19 18:42:19,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:19,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453403798] [2020-10-19 18:42:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:19,393 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:19,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:19,398 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash 29863736, now seen corresponding path program 1 times [2020-10-19 18:42:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973477949] [2020-10-19 18:42:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:19,410 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:19,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:19,416 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:19,442 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:19,442 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:19,442 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:19,442 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:19,443 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:42:19,443 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,443 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:19,443 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:19,444 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration3_Loop [2020-10-19 18:42:19,444 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:19,444 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:19,446 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 18:42:19,451 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 18:42:19,454 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 18:42:19,522 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:19,523 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:19,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:42:19,533 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:42:19,533 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:19,578 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:19,578 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,583 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:42:19,583 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:19,623 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:42:19,668 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:42:19,701 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:42:19,703 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:19,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:19,704 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:19,704 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:19,704 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:42:19,704 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,704 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:19,705 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:19,705 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration3_Loop [2020-10-19 18:42:19,705 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:19,705 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:19,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:19,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:19,716 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 18:42:19,783 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:19,783 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-19 18:42:19,794 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:42:19,797 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:19,797 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:19,797 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:19,798 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:19,803 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:42:19,804 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,812 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,861 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 18:42:19,864 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:19,864 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:19,864 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:19,865 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:19,869 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-19 18:42:19,869 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-19 18:42:19,874 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,921 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 18:42:19,923 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:19,923 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:42:19,923 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:19,924 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:19,924 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:19,925 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:42:19,925 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:42:19,935 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:42:19,939 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:42:19,939 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:19,943 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:42:19,943 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:42:19,943 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:42:19,943 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-19 18:42:19,965 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:42:19,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:42:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:19,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:42:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:20,043 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 18:42:20,044 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 18:42:20,044 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-19 18:42:20,063 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 21 states and 28 transitions. Complement of second has 5 states. [2020-10-19 18:42:20,063 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 18:42:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 18:42:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-10-19 18:42:20,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 3 letters. [2020-10-19 18:42:20,065 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:20,065 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 3 letters. [2020-10-19 18:42:20,065 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:20,065 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 2 letters. Loop has 6 letters. [2020-10-19 18:42:20,066 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:20,066 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 28 transitions. [2020-10-19 18:42:20,067 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-19 18:42:20,068 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 27 transitions. [2020-10-19 18:42:20,068 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-19 18:42:20,069 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-19 18:42:20,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 27 transitions. [2020-10-19 18:42:20,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:42:20,069 INFO L691 BuchiCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-10-19 18:42:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 27 transitions. [2020-10-19 18:42:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-10-19 18:42:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 18:42:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2020-10-19 18:42:20,072 INFO L714 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2020-10-19 18:42:20,072 INFO L594 BuchiCegarLoop]: Abstraction has 16 states and 23 transitions. [2020-10-19 18:42:20,072 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:42:20,073 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 23 transitions. [2020-10-19 18:42:20,073 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-19 18:42:20,074 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:20,074 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:20,074 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:42:20,074 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:42:20,074 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 158#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 166#L10 assume !(main_~i~0 > 0); 153#L10-2 [2020-10-19 18:42:20,075 INFO L796 eck$LassoCheckResult]: Loop: 153#L10-2 assume !(main_~i~0 < 0); 162#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 152#L10 assume !(main_~i~0 > 0); 153#L10-2 [2020-10-19 18:42:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-10-19 18:42:20,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:20,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972520548] [2020-10-19 18:42:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:20,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:20,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:20,084 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 50297, now seen corresponding path program 1 times [2020-10-19 18:42:20,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:20,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262706201] [2020-10-19 18:42:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:20,090 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:20,092 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:20,093 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 925835413, now seen corresponding path program 1 times [2020-10-19 18:42:20,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:20,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655675907] [2020-10-19 18:42:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:20,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:20,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:20,104 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:20,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:42:20 BoogieIcfgContainer [2020-10-19 18:42:20,164 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:42:20,165 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:42:20,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:42:20,165 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:42:20,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:42:18" (3/4) ... [2020-10-19 18:42:20,169 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:42:20,210 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:42:20,210 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:42:20,213 INFO L168 Benchmark]: Toolchain (without parser) took 2476.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 954.6 MB in the beginning and 935.2 MB in the end (delta: 19.4 MB). Peak memory consumption was 145.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:20,214 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:42:20,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.95 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:20,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:20,216 INFO L168 Benchmark]: Boogie Preprocessor took 15.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:42:20,216 INFO L168 Benchmark]: RCFGBuilder took 214.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:20,217 INFO L168 Benchmark]: BuchiAutomizer took 1862.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 935.2 MB in the end (delta: 169.6 MB). Peak memory consumption was 169.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:20,218 INFO L168 Benchmark]: Witness Printer took 45.77 ms. Allocated memory is still 1.2 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:42:20,222 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 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 241.95 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 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 86.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 214.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1862.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 935.2 MB in the end (delta: 169.6 MB). Peak memory consumption was 169.6 MB. Max. memory is 11.5 GB. * Witness Printer took 45.77 ms. Allocated memory is still 1.2 GB. Free memory is still 935.2 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 (1 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 3 locations. One deterministic module has affine ranking function i and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 16 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.8s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 14 SDslu, 3 SDs, 0 SdLazy, 30 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax186 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq143 hnf94 smp100 dnf100 smp100 tf110 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6ea0a82f=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE i >= -5 && i <= 5 [L10] COND FALSE !(i > 0) Loop: [L13] COND FALSE !(i < 0) [L9] COND TRUE i >= -5 && i <= 5 [L10] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...