./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/AlternKonv.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/AlternKonv.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 475cf88887990488194ca7f61a6d05f74a450e7b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 06:35:09,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:35:09,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:35:09,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:35:09,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:35:09,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:35:09,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:35:09,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:35:09,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:35:09,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:35:09,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:35:09,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:35:09,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:35:09,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:35:09,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:35:09,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:35:09,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:35:09,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:35:09,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:35:09,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:35:09,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:35:09,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:35:09,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:35:09,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:35:09,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:35:09,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:35:09,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:35:09,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:35:09,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:35:09,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:35:09,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:35:09,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:35:09,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:35:09,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:35:09,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:35:09,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:35:09,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:35:09,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:35:09,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:35:09,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:35:09,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:35:09,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:35:09,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:35:09,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:35:09,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:35:09,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:35:09,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:35:09,752 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:35:09,752 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:35:09,753 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:35:09,753 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:35:09,753 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:35:09,754 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:35:09,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:35:09,755 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:35:09,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:35:09,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:35:09,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:35:09,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:35:09,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:35:09,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:35:09,757 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:35:09,758 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:35:09,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:35:09,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:35:09,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:35:09,759 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:35:09,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:35:09,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:35:09,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:35:09,760 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:35:09,761 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:35:09,762 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 -> 475cf88887990488194ca7f61a6d05f74a450e7b [2020-10-20 06:35:09,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:35:09,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:35:09,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:35:09,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:35:09,984 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:35:09,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2020-10-20 06:35:10,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3241689/364ab7d231f84969b679d7b44c69e064/FLAG0cc74c1d2 [2020-10-20 06:35:10,457 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:35:10,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2020-10-20 06:35:10,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3241689/364ab7d231f84969b679d7b44c69e064/FLAG0cc74c1d2 [2020-10-20 06:35:10,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3241689/364ab7d231f84969b679d7b44c69e064 [2020-10-20 06:35:10,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:35:10,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:35:10,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:35:10,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:35:10,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:35:10,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f72a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:10, skipping insertion in model container [2020-10-20 06:35:10,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:35:10" (1/1) ... [2020-10-20 06:35:10,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:35:10,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:35:11,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:35:11,202 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:35:11,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:35:11,232 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:35:11,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11 WrapperNode [2020-10-20 06:35:11,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:35:11,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:35:11,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:35:11,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:35:11,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:35:11,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:35:11,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:35:11,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:35:11,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... [2020-10-20 06:35:11,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:35:11,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:35:11,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:35:11,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:35:11,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:35:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:35:11,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:35:11,557 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-20 06:35:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:11 BoogieIcfgContainer [2020-10-20 06:35:11,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:35:11,560 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:35:11,560 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:35:11,564 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:35:11,565 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:11,565 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:35:10" (1/3) ... [2020-10-20 06:35:11,567 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4493de58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:35:11, skipping insertion in model container [2020-10-20 06:35:11,567 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:11,567 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:11" (2/3) ... [2020-10-20 06:35:11,568 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4493de58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:35:11, skipping insertion in model container [2020-10-20 06:35:11,568 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:11,575 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:11" (3/3) ... [2020-10-20 06:35:11,578 INFO L373 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2020-10-20 06:35:11,662 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:35:11,662 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:35:11,662 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:35:11,663 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:35:11,663 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:35:11,663 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:35:11,663 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:35:11,663 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:35:11,678 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states. [2020-10-20 06:35:11,701 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:11,701 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:11,701 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:11,708 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:35:11,708 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:35:11,709 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:35:11,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states. [2020-10-20 06:35:11,710 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:11,710 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:11,710 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:11,711 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:35:11,711 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:35:11,717 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 5#L18-2true [2020-10-20 06:35:11,717 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(0 != main_~i~0); 3#L10true assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 6#L12true assume !(main_~i~0 < 0); 5#L18-2true [2020-10-20 06:35:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-20 06:35:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:11,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774145565] [2020-10-20 06:35:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,848 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 39827, now seen corresponding path program 1 times [2020-10-20 06:35:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:11,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421101677] [2020-10-20 06:35:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,869 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash 963348, now seen corresponding path program 1 times [2020-10-20 06:35:11,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:11,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213606056] [2020-10-20 06:35:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,879 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:11,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:11,885 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:11,973 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:11,974 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:11,975 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:11,975 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:11,975 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:11,976 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:11,976 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:11,976 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:11,976 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2020-10-20 06:35:11,977 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:11,978 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:12,012 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,167 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:12,168 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,178 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:12,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:12,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:12,190 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:12,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:12,230 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:12,230 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:12,257 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:12,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:12,330 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:12,334 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:12,335 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:12,335 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:12,335 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:12,335 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:12,335 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,335 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:12,335 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:12,336 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2020-10-20 06:35:12,336 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:12,336 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:12,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:12,425 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:12,431 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,436 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:12,439 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:12,439 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:12,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:12,440 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:12,449 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:35:12,450 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:35:12,461 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,488 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:12,490 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:12,490 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:12,491 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:12,491 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:12,496 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:35:12,497 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:35:12,502 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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,527 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:12,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:12,529 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:12,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:12,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:12,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:12,531 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:12,532 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:35:12,536 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:12,539 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 06:35:12,539 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:12,543 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:12,544 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:12,544 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:12,545 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-20 06:35:12,568 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:12,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:12,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:35:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:12,721 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-20 06:35:12,722 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states. Second operand 4 states. [2020-10-20 06:35:12,789 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states.. Second operand 4 states. Result 32 states and 45 transitions. Complement of second has 6 states. [2020-10-20 06:35:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:35:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-10-20 06:35:12,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 3 letters. [2020-10-20 06:35:12,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:12,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2020-10-20 06:35:12,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:12,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 1 letters. Loop has 6 letters. [2020-10-20 06:35:12,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:12,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 45 transitions. [2020-10-20 06:35:12,802 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:12,807 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 14 states and 20 transitions. [2020-10-20 06:35:12,808 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-20 06:35:12,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-20 06:35:12,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2020-10-20 06:35:12,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:12,810 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-10-20 06:35:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2020-10-20 06:35:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2020-10-20 06:35:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 06:35:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2020-10-20 06:35:12,841 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-10-20 06:35:12,842 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2020-10-20 06:35:12,842 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:35:12,842 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2020-10-20 06:35:12,843 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:12,843 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:12,843 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:12,843 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:35:12,843 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:35:12,844 INFO L794 eck$LassoCheckResult]: Stem: 85#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 86#L18-2 assume !!(0 != main_~i~0); 79#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 80#L18 [2020-10-20 06:35:12,844 INFO L796 eck$LassoCheckResult]: Loop: 80#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 89#L18-2 assume !!(0 != main_~i~0); 90#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 80#L18 [2020-10-20 06:35:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 1 times [2020-10-20 06:35:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:12,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266095253] [2020-10-20 06:35:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:12,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:12,856 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:12,858 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:12,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash 57996, now seen corresponding path program 1 times [2020-10-20 06:35:12,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:12,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819333462] [2020-10-20 06:35:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:12,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819333462] [2020-10-20 06:35:12,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:35:12,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-20 06:35:12,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390814027] [2020-10-20 06:35:12,929 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:35:12,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:35:12,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:35:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:35:12,936 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 8 Second operand 3 states. [2020-10-20 06:35:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:35:12,967 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2020-10-20 06:35:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:35:12,970 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 20 transitions. [2020-10-20 06:35:12,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-20 06:35:12,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 14 states and 20 transitions. [2020-10-20 06:35:12,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-20 06:35:12,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-20 06:35:12,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2020-10-20 06:35:12,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:12,973 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-10-20 06:35:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2020-10-20 06:35:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-20 06:35:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 06:35:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-10-20 06:35:12,980 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-10-20 06:35:12,980 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-10-20 06:35:12,980 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:35:12,980 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-10-20 06:35:12,983 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-20 06:35:12,983 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:12,984 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:12,984 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:35:12,984 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:35:12,985 INFO L794 eck$LassoCheckResult]: Stem: 115#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; 116#L18-2 assume !!(0 != main_~i~0); 111#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 112#L18 [2020-10-20 06:35:12,985 INFO L796 eck$LassoCheckResult]: Loop: 112#L18 assume !(main_~i~0 > 0); 122#L18-2 assume !!(0 != main_~i~0); 124#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 112#L18 [2020-10-20 06:35:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 2 times [2020-10-20 06:35:12,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:12,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245955258] [2020-10-20 06:35:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:12,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,017 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,018 INFO L82 PathProgramCache]: Analyzing trace with hash 59918, now seen corresponding path program 1 times [2020-10-20 06:35:13,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333741101] [2020-10-20 06:35:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:13,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333741101] [2020-10-20 06:35:13,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:35:13,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:35:13,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807265278] [2020-10-20 06:35:13,040 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:35:13,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:35:13,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:35:13,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:35:13,041 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-10-20 06:35:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:35:13,067 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2020-10-20 06:35:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:35:13,068 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 22 transitions. [2020-10-20 06:35:13,069 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-20 06:35:13,070 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 22 transitions. [2020-10-20 06:35:13,070 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-10-20 06:35:13,070 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-10-20 06:35:13,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2020-10-20 06:35:13,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:13,071 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2020-10-20 06:35:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2020-10-20 06:35:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-20 06:35:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 06:35:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-10-20 06:35:13,074 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-10-20 06:35:13,074 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-10-20 06:35:13,074 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:35:13,074 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-10-20 06:35:13,075 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-10-20 06:35:13,075 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:13,075 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:13,076 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:35:13,076 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2020-10-20 06:35:13,076 INFO L794 eck$LassoCheckResult]: Stem: 152#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 153#L18-2 assume !!(0 != main_~i~0); 148#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 149#L18 [2020-10-20 06:35:13,076 INFO L796 eck$LassoCheckResult]: Loop: 149#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 154#L18-2 assume !!(0 != main_~i~0); 155#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 157#L12 assume !(main_~i~0 < 0); 159#L18-2 assume !!(0 != main_~i~0); 161#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 149#L18 [2020-10-20 06:35:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash 31088, now seen corresponding path program 3 times [2020-10-20 06:35:13,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068623527] [2020-10-20 06:35:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,086 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,087 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1727393992, now seen corresponding path program 1 times [2020-10-20 06:35:13,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278669] [2020-10-20 06:35:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,094 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,098 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,100 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash 684415735, now seen corresponding path program 1 times [2020-10-20 06:35:13,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120789452] [2020-10-20 06:35:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,116 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:13,160 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:13,161 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:13,161 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:13,161 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:13,161 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:13,161 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,161 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:13,161 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:13,161 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration4_Loop [2020-10-20 06:35:13,162 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:13,162 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:13,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,260 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:13,260 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,269 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:13,269 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:13,276 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:13,276 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:13,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:13,321 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:13,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,364 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:13,364 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:13,394 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:13,399 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:13,427 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:13,427 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:13,427 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:13,427 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:13,427 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:13,427 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,427 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:13,428 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:13,428 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration4_Loop [2020-10-20 06:35:13,428 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:13,428 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:13,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,500 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:13,500 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:13,519 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:13,524 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:13,524 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:13,525 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:13,525 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:13,531 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:35:13,531 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:35:13,540 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:13,597 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:13,599 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:13,599 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:13,599 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:13,599 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:13,599 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:13,601 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:13,601 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,609 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:13,612 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 06:35:13,612 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:13,624 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:13,624 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:13,624 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:13,624 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,657 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:35:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:13,723 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:35:13,723 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-10-20 06:35:13,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 25 states and 35 transitions. Complement of second has 5 states. [2020-10-20 06:35:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:35:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2020-10-20 06:35:13,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-20 06:35:13,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:13,744 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:35:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:35:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:13,794 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:35:13,794 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-10-20 06:35:13,840 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 43 states and 63 transitions. Complement of second has 9 states. [2020-10-20 06:35:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 06:35:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-20 06:35:13,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-20 06:35:13,852 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:13,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 9 letters. Loop has 6 letters. [2020-10-20 06:35:13,852 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:13,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 3 letters. Loop has 12 letters. [2020-10-20 06:35:13,853 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:13,853 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 63 transitions. [2020-10-20 06:35:13,857 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2020-10-20 06:35:13,858 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 41 states and 60 transitions. [2020-10-20 06:35:13,859 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-10-20 06:35:13,868 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2020-10-20 06:35:13,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 60 transitions. [2020-10-20 06:35:13,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:13,869 INFO L691 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2020-10-20 06:35:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 60 transitions. [2020-10-20 06:35:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-20 06:35:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 06:35:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 55 transitions. [2020-10-20 06:35:13,881 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 55 transitions. [2020-10-20 06:35:13,881 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 55 transitions. [2020-10-20 06:35:13,882 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 06:35:13,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 55 transitions. [2020-10-20 06:35:13,886 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 18 [2020-10-20 06:35:13,886 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:13,886 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:13,887 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-20 06:35:13,887 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 06:35:13,889 INFO L794 eck$LassoCheckResult]: Stem: 323#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 324#L18-2 assume !!(0 != main_~i~0); 321#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 322#L12 assume main_~i~0 < 0; 328#L13 [2020-10-20 06:35:13,889 INFO L796 eck$LassoCheckResult]: Loop: 328#L13 assume !(main_~i~0 <= -2147483648);main_~i~0 := -1 * main_~i~0; 334#L18-2 assume !!(0 != main_~i~0); 354#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 352#L12 assume main_~i~0 < 0; 328#L13 [2020-10-20 06:35:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash 963341, now seen corresponding path program 1 times [2020-10-20 06:35:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607458122] [2020-10-20 06:35:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,903 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1559161, now seen corresponding path program 1 times [2020-10-20 06:35:13,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111881092] [2020-10-20 06:35:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,910 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:13,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:13,914 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 608049029, now seen corresponding path program 1 times [2020-10-20 06:35:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:13,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243016513] [2020-10-20 06:35:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:13,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243016513] [2020-10-20 06:35:13,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:35:13,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:35:13,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421218177] [2020-10-20 06:35:13,960 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:13,961 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:13,961 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:13,961 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:13,961 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:13,961 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:13,961 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:13,961 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:13,961 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration5_Loop [2020-10-20 06:35:13,962 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:13,962 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:13,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:13,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,007 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:14,008 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,011 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:14,011 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:14,015 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,065 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:14,066 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,070 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:14,070 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:14,115 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,167 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:14,167 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,269 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:14,271 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:14,271 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:14,271 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:14,271 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:14,271 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:14,271 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,271 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:14,271 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:14,272 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration5_Loop [2020-10-20 06:35:14,272 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:14,272 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:14,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,323 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:14,324 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 06:35:14,345 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:14,347 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:14,347 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:14,347 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:14,347 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:14,349 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:35:14,350 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,353 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,394 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:14,395 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:14,395 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:14,396 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:14,396 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:14,398 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:35:14,398 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,402 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,437 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:14,439 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:14,439 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:14,439 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:14,439 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:14,439 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:14,440 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:14,440 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,444 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:14,447 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:35:14,448 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,453 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:14,454 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:14,454 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:14,454 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,489 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:14,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:35:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:14,537 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:35:14,537 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 55 transitions. cyclomatic complexity: 24 Second operand 4 states. [2020-10-20 06:35:14,657 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 55 transitions. cyclomatic complexity: 24. Second operand 4 states. Result 147 states and 212 transitions. Complement of second has 11 states. [2020-10-20 06:35:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 06:35:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2020-10-20 06:35:14,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 4 letters. Loop has 4 letters. [2020-10-20 06:35:14,658 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:14,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 8 letters. Loop has 4 letters. [2020-10-20 06:35:14,659 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:14,659 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 26 transitions. Stem has 4 letters. Loop has 8 letters. [2020-10-20 06:35:14,659 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:14,660 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 147 states and 212 transitions. [2020-10-20 06:35:14,664 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 23 [2020-10-20 06:35:14,666 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 147 states to 121 states and 178 transitions. [2020-10-20 06:35:14,667 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2020-10-20 06:35:14,667 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2020-10-20 06:35:14,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 178 transitions. [2020-10-20 06:35:14,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:14,668 INFO L691 BuchiCegarLoop]: Abstraction has 121 states and 178 transitions. [2020-10-20 06:35:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 178 transitions. [2020-10-20 06:35:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2020-10-20 06:35:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-20 06:35:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 153 transitions. [2020-10-20 06:35:14,677 INFO L714 BuchiCegarLoop]: Abstraction has 101 states and 153 transitions. [2020-10-20 06:35:14,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:35:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:35:14,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:35:14,678 INFO L87 Difference]: Start difference. First operand 101 states and 153 transitions. Second operand 4 states. [2020-10-20 06:35:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:35:14,705 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2020-10-20 06:35:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:35:14,705 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 80 states and 105 transitions. [2020-10-20 06:35:14,707 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 31 [2020-10-20 06:35:14,708 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 80 states to 72 states and 97 transitions. [2020-10-20 06:35:14,709 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2020-10-20 06:35:14,709 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2020-10-20 06:35:14,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 97 transitions. [2020-10-20 06:35:14,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:14,710 INFO L691 BuchiCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-10-20 06:35:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states and 97 transitions. [2020-10-20 06:35:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2020-10-20 06:35:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-20 06:35:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2020-10-20 06:35:14,714 INFO L714 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2020-10-20 06:35:14,714 INFO L594 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2020-10-20 06:35:14,714 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 06:35:14,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 50 transitions. [2020-10-20 06:35:14,715 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-10-20 06:35:14,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:14,716 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:14,716 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-20 06:35:14,716 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 06:35:14,717 INFO L794 eck$LassoCheckResult]: Stem: 746#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 747#L18-2 assume !!(0 != main_~i~0); 766#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 768#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 753#L18-2 [2020-10-20 06:35:14,717 INFO L796 eck$LassoCheckResult]: Loop: 753#L18-2 assume !!(0 != main_~i~0); 773#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 751#L12 assume !(main_~i~0 < 0); 753#L18-2 [2020-10-20 06:35:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash 963757, now seen corresponding path program 1 times [2020-10-20 06:35:14,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:14,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462737310] [2020-10-20 06:35:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:14,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:14,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:14,727 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 39827, now seen corresponding path program 2 times [2020-10-20 06:35:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:14,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044282228] [2020-10-20 06:35:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:14,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:14,734 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:14,735 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:14,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1353476249, now seen corresponding path program 2 times [2020-10-20 06:35:14,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:14,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108876726] [2020-10-20 06:35:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:14,741 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:14,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:14,746 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:14,770 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:14,770 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:14,770 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:14,770 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:14,771 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:14,771 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,771 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:14,771 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:14,771 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration6_Loop [2020-10-20 06:35:14,771 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:14,772 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:14,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,826 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:14,826 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 06:35:14,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:14,836 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,861 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:14,861 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:14,885 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:14,887 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:14,887 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:14,887 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:14,887 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:14,887 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:14,887 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,887 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:14,887 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:14,888 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration6_Loop [2020-10-20 06:35:14,888 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:14,888 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:14,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:14,955 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:14,955 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,967 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:14,968 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:14,968 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:14,969 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:14,969 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:14,969 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:14,970 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:14,970 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:14,973 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:14,984 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:35:14,984 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:14,994 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:14,995 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:14,995 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:14,995 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:15,028 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:35:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:15,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:35:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:15,080 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-20 06:35:15,081 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 4 states. [2020-10-20 06:35:15,104 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 4 states. Result 73 states and 96 transitions. Complement of second has 5 states. [2020-10-20 06:35:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:35:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 14 transitions. [2020-10-20 06:35:15,105 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 4 letters. Loop has 3 letters. [2020-10-20 06:35:15,105 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:15,105 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 7 letters. Loop has 3 letters. [2020-10-20 06:35:15,106 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:15,106 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 14 transitions. Stem has 4 letters. Loop has 6 letters. [2020-10-20 06:35:15,106 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:15,106 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 96 transitions. [2020-10-20 06:35:15,108 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-10-20 06:35:15,109 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 65 states and 88 transitions. [2020-10-20 06:35:15,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2020-10-20 06:35:15,109 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2020-10-20 06:35:15,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 88 transitions. [2020-10-20 06:35:15,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:15,109 INFO L691 BuchiCegarLoop]: Abstraction has 65 states and 88 transitions. [2020-10-20 06:35:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states and 88 transitions. [2020-10-20 06:35:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-10-20 06:35:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 06:35:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2020-10-20 06:35:15,114 INFO L714 BuchiCegarLoop]: Abstraction has 57 states and 80 transitions. [2020-10-20 06:35:15,115 INFO L594 BuchiCegarLoop]: Abstraction has 57 states and 80 transitions. [2020-10-20 06:35:15,115 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 06:35:15,115 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 80 transitions. [2020-10-20 06:35:15,116 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-10-20 06:35:15,116 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:15,116 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:15,116 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-20 06:35:15,116 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2020-10-20 06:35:15,116 INFO L794 eck$LassoCheckResult]: Stem: 896#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 897#L18-2 assume !!(0 != main_~i~0); 927#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 925#L18 assume !(main_~i~0 > 0); 908#L18-2 [2020-10-20 06:35:15,117 INFO L796 eck$LassoCheckResult]: Loop: 908#L18-2 assume !!(0 != main_~i~0); 948#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 936#L12 assume !(main_~i~0 < 0); 947#L18-2 assume !!(0 != main_~i~0); 935#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 893#L18 assume !(main_~i~0 > 0); 908#L18-2 [2020-10-20 06:35:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 963759, now seen corresponding path program 1 times [2020-10-20 06:35:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:15,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223375909] [2020-10-20 06:35:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:15,121 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:15,123 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:15,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1186496604, now seen corresponding path program 1 times [2020-10-20 06:35:15,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:15,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81296365] [2020-10-20 06:35:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:15,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:15,132 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:15,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1517058698, now seen corresponding path program 1 times [2020-10-20 06:35:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:15,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165305372] [2020-10-20 06:35:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:15,139 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:15,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:15,144 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:15,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:35:15 BoogieIcfgContainer [2020-10-20 06:35:15,253 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:35:15,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:35:15,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:35:15,256 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:35:15,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:11" (3/4) ... [2020-10-20 06:35:15,261 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-20 06:35:15,326 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:35:15,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:35:15,328 INFO L168 Benchmark]: Toolchain (without parser) took 4437.87 ms. Allocated memory was 36.2 MB in the beginning and 57.1 MB in the end (delta: 21.0 MB). Free memory was 9.9 MB in the beginning and 35.8 MB in the end (delta: -25.9 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:35:15,329 INFO L168 Benchmark]: CDTParser took 1.31 ms. Allocated memory is still 35.7 MB. Free memory was 14.4 MB in the beginning and 14.3 MB in the end (delta: 52.3 kB). Peak memory consumption was 52.3 kB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.79 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 9.1 MB in the beginning and 28.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.31 ms. Allocated memory is still 44.6 MB. Free memory was 28.4 MB in the beginning and 26.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,332 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 44.6 MB. Free memory was 26.9 MB in the beginning and 25.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,333 INFO L168 Benchmark]: RCFGBuilder took 262.43 ms. Allocated memory is still 44.6 MB. Free memory was 25.7 MB in the beginning and 16.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,342 INFO L168 Benchmark]: BuchiAutomizer took 3693.28 ms. Allocated memory was 44.6 MB in the beginning and 57.1 MB in the end (delta: 12.6 MB). Free memory was 16.4 MB in the beginning and 37.5 MB in the end (delta: -21.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,343 INFO L168 Benchmark]: Witness Printer took 70.77 ms. Allocated memory is still 57.1 MB. Free memory was 37.5 MB in the beginning and 35.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:15,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.31 ms. Allocated memory is still 35.7 MB. Free memory was 14.4 MB in the beginning and 14.3 MB in the end (delta: 52.3 kB). Peak memory consumption was 52.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 333.79 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 9.1 MB in the beginning and 28.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.31 ms. Allocated memory is still 44.6 MB. Free memory was 28.4 MB in the beginning and 26.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 44.6 MB. Free memory was 26.9 MB in the beginning and 25.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 262.43 ms. Allocated memory is still 44.6 MB. Free memory was 25.7 MB in the beginning and 16.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 3693.28 ms. Allocated memory was 44.6 MB in the beginning and 57.1 MB in the end (delta: 12.6 MB). Free memory was 16.4 MB in the beginning and 37.5 MB in the end (delta: -21.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 14.3 GB. * Witness Printer took 70.77 ms. Allocated memory is still 57.1 MB. Free memory was 37.5 MB in the beginning and 35.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (3 trivial, 4 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 4 locations. One deterministic module has affine ranking function i and consists of 5 locations. One deterministic module has affine ranking function i and consists of 6 locations. One deterministic module has affine ranking function -1 * i and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 57 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 7 iterations. TraceHistogramMax:2. Analysis of lassos took 2.6s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 74 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 57 states and ocurred in iteration 6. Nontrivial modules had stage [3, 1, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 2/2 HoareTripleCheckerStatistics: 61 SDtfs, 69 SDslu, 3 SDs, 0 SdLazy, 139 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT3 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax181 hnf92 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq152 hnf94 smp93 dnf100 smp100 tf111 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 9]: 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@629d722=0, \result=0, i=-1} - 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 != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) Loop: [L9] COND TRUE i != 0 [L10] COND TRUE i < 0 [L11] i = i+2 [L12] COND FALSE !(i < 0) [L9] COND TRUE i != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...