./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 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_1.5.800.v20200727-1323.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/loop-lit/gr2006.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 04:50:10,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:50:10,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:50:10,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:50:10,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:50:10,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:50:10,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:50:10,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:50:10,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:50:10,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:50:10,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:50:10,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:50:10,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:50:10,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:50:10,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:50:10,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:50:10,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:50:10,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:50:10,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:50:10,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:50:10,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:50:10,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:50:10,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:50:10,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:50:10,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:50:10,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:50:10,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:50:10,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:50:10,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:50:10,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:50:10,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:50:10,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:50:10,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:50:10,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:50:10,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:50:10,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:50:10,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:50:10,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:50:10,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:50:10,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:50:10,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:50:10,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-26 04:50:10,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:50:10,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:50:10,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:50:10,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:50:10,980 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:50:10,981 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 04:50:10,982 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 04:50:10,982 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 04:50:10,983 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 04:50:10,983 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 04:50:10,983 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 04:50:10,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:50:10,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 04:50:10,985 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:50:10,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:50:10,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 04:50:10,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:50:10,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 04:50:10,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 04:50:10,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 04:50:10,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 04:50:10,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:50:10,987 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 04:50:10,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:50:10,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 04:50:10,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:50:10,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:50:10,989 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 04:50:10,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:50:10,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:50:10,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:50:10,991 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 04:50:10,993 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 04:50:10,995 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2020-10-26 04:50:11,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:50:11,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:50:11,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:50:11,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:50:11,454 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:50:11,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gr2006.i [2020-10-26 04:50:11,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd1a79d1/1128cb681d7a40d89b078e93c4257a07/FLAGd7bf2a7af [2020-10-26 04:50:12,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:50:12,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i [2020-10-26 04:50:12,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd1a79d1/1128cb681d7a40d89b078e93c4257a07/FLAGd7bf2a7af [2020-10-26 04:50:12,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd1a79d1/1128cb681d7a40d89b078e93c4257a07 [2020-10-26 04:50:12,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:50:12,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:50:12,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:50:12,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:50:12,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:50:12,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a326ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12, skipping insertion in model container [2020-10-26 04:50:12,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:50:12,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:50:12,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:50:12,794 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:50:12,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:50:12,842 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:50:12,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12 WrapperNode [2020-10-26 04:50:12,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:50:12,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:50:12,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:50:12,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:50:12,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:50:12,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:50:12,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:50:12,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:50:12,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... [2020-10-26 04:50:12,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:50:12,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:50:12,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:50:12,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:50:12,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 04:50:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 04:50:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:50:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:50:13,310 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:50:13,310 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-26 04:50:13,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:50:13 BoogieIcfgContainer [2020-10-26 04:50:13,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:50:13,313 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 04:50:13,313 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 04:50:13,317 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 04:50:13,318 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:50:13,318 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 04:50:12" (1/3) ... [2020-10-26 04:50:13,319 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@513286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:50:13, skipping insertion in model container [2020-10-26 04:50:13,319 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:50:13,320 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:50:12" (2/3) ... [2020-10-26 04:50:13,320 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@513286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:50:13, skipping insertion in model container [2020-10-26 04:50:13,320 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:50:13,320 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:50:13" (3/3) ... [2020-10-26 04:50:13,322 INFO L373 chiAutomizerObserver]: Analyzing ICFG gr2006.i [2020-10-26 04:50:13,381 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 04:50:13,382 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 04:50:13,382 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 04:50:13,382 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:50:13,382 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:50:13,382 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 04:50:13,382 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:50:13,382 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 04:50:13,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-26 04:50:13,418 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:13,419 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:50:13,419 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:50:13,427 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-26 04:50:13,427 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:50:13,427 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 04:50:13,428 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-10-26 04:50:13,429 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:13,430 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:50:13,430 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:50:13,430 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-26 04:50:13,430 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:50:13,449 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 10#L-1true havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 3#L28-2true [2020-10-26 04:50:13,450 INFO L796 eck$LassoCheckResult]: Loop: 3#L28-2true assume !false; 8#L29true assume !(main_~x~0 < 50);main_#t~post4 := main_~y~0;main_~y~0 := main_#t~post4 - 1;havoc main_#t~post4; 5#L29-2true assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 3#L28-2true [2020-10-26 04:50:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-10-26 04:50:13,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:13,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588023956] [2020-10-26 04:50:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:13,599 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:13,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:13,639 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2020-10-26 04:50:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:13,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478741881] [2020-10-26 04:50:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:13,650 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:13,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:13,659 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2020-10-26 04:50:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:13,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274665279] [2020-10-26 04:50:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:13,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274665279] [2020-10-26 04:50:13,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:50:13,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 04:50:13,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734912351] [2020-10-26 04:50:13,934 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-10-26 04:50:13,990 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:13,991 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:13,991 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:13,991 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:13,991 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:50:13,991 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:13,991 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:13,992 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:13,992 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2020-10-26 04:50:13,992 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:13,992 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:14,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,278 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:14,279 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:14,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:14,290 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,303 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:14,304 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=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) [2020-10-26 04:50:14,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:14,345 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:14,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:14,397 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,415 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:14,417 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=50} Honda state: {ULTIMATE.start_main_~x~0=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=1}] Lambdas: [3, 12, 1] Nus: [1, 0] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:14,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:14,461 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:14,507 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:50:14,581 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:50:14,583 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:14,583 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:14,584 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:14,584 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:14,584 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:50:14,584 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,584 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:14,584 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:14,584 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2020-10-26 04:50:14,585 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:14,585 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:14,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:14,662 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:14,667 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:14,681 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 [2020-10-26 04:50:14,683 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:14,684 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:14,684 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:14,684 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:14,685 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:14,687 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:14,687 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,691 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:14,728 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,731 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:14,731 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:14,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:14,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:14,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:14,737 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:14,738 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:50:14,741 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:14,785 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 [2020-10-26 04:50:14,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:14,787 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:14,787 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:14,787 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:14,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:14,790 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:14,790 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:50:14,794 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:50:14,799 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:50:14,800 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 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 [2020-10-26 04:50:14,810 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:50:14,811 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:50:14,811 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:50:14,811 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2020-10-26 04:50:14,843 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:50:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:50:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:14,985 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 [2020-10-26 04:50:14,986 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2020-10-26 04:50:15,052 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 4 states. Result 45 states and 59 transitions. Complement of second has 8 states. [2020-10-26 04:50:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:50:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 04:50:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 27 transitions. [2020-10-26 04:50:15,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 2 letters. Loop has 3 letters. [2020-10-26 04:50:15,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:15,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 5 letters. Loop has 3 letters. [2020-10-26 04:50:15,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:15,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 2 letters. Loop has 6 letters. [2020-10-26 04:50:15,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:15,060 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 59 transitions. [2020-10-26 04:50:15,065 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:15,069 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 10 states and 13 transitions. [2020-10-26 04:50:15,070 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-10-26 04:50:15,070 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-26 04:50:15,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-10-26 04:50:15,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:50:15,071 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-26 04:50:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-10-26 04:50:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-26 04:50:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-26 04:50:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-10-26 04:50:15,098 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-10-26 04:50:15,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:50:15,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 04:50:15,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 04:50:15,103 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2020-10-26 04:50:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:50:15,122 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-10-26 04:50:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 04:50:15,123 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-10-26 04:50:15,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:15,125 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 9 transitions. [2020-10-26 04:50:15,125 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-26 04:50:15,125 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-26 04:50:15,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-10-26 04:50:15,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:50:15,126 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-26 04:50:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-10-26 04:50:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-10-26 04:50:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-26 04:50:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-10-26 04:50:15,127 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-26 04:50:15,127 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-26 04:50:15,127 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-26 04:50:15,128 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-10-26 04:50:15,128 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:15,128 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:50:15,128 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:50:15,129 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-26 04:50:15,129 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:50:15,129 INFO L794 eck$LassoCheckResult]: Stem: 126#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 122#L-1 havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 123#L28-2 assume !false; 128#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 127#L29-2 [2020-10-26 04:50:15,129 INFO L796 eck$LassoCheckResult]: Loop: 127#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 124#L28-2 assume !false; 125#L29 assume !(main_~x~0 < 50);main_#t~post4 := main_~y~0;main_~y~0 := main_#t~post4 - 1;havoc main_#t~post4; 127#L29-2 [2020-10-26 04:50:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2020-10-26 04:50:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:15,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462992358] [2020-10-26 04:50:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:15,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:15,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:15,158 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2020-10-26 04:50:15,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:15,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154187325] [2020-10-26 04:50:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:15,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:15,167 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:15,179 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:15,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2020-10-26 04:50:15,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:15,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651370050] [2020-10-26 04:50:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:15,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651370050] [2020-10-26 04:50:15,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512831148] [2020-10-26 04:50:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 04:50:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 04:50:15,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:15,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 04:50:15,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-10-26 04:50:15,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854162428] [2020-10-26 04:50:15,449 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:15,449 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:15,449 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:15,450 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:15,450 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:50:15,450 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,450 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:15,450 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:15,450 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2020-10-26 04:50:15,450 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:15,451 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:15,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,513 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:15,513 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:15,527 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:15,527 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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 [2020-10-26 04:50:15,572 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:15,572 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:50:15,606 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:15,606 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=49} Honda state: {ULTIMATE.start_main_~x~0=49} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=1}, {ULTIMATE.start_main_~x~0=0}] Lambdas: [7, 1, 6] Nus: [0, 0] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,639 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:15,639 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:50:15,648 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:15,648 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:15,677 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:15,677 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,680 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:15,681 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post4=0} Honda state: {ULTIMATE.start_main_#t~post4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-26 04:50:15,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:15,721 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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) [2020-10-26 04:50:15,772 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:15,773 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 [2020-10-26 04:50:15,811 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:50:15,813 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:15,813 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:15,813 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:15,813 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:15,813 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:50:15,813 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,813 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:15,813 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:15,814 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2020-10-26 04:50:15,814 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:15,814 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:15,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:15,876 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:15,877 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,884 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 [2020-10-26 04:50:15,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:15,885 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:15,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:15,886 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:15,886 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:15,887 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:15,887 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:50:15,890 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:15,930 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 [2020-10-26 04:50:15,932 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:15,932 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:15,933 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:15,933 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:15,933 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:15,934 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:15,934 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,940 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:15,982 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 [2020-10-26 04:50:15,984 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:15,984 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:15,985 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:15,985 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:15,985 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:15,986 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:15,986 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:15,988 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 21 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:16,022 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 [2020-10-26 04:50:16,024 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:16,024 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:16,025 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:16,025 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:16,025 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:16,026 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:16,026 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:50:16,028 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:50:16,032 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:50:16,032 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:16,042 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:50:16,042 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:50:16,042 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:50:16,042 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2020-10-26 04:50:16,065 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:50:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:16,172 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 [2020-10-26 04:50:16,172 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-26 04:50:16,190 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 13 states and 16 transitions. Complement of second has 5 states. [2020-10-26 04:50:16,193 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 [2020-10-26 04:50:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:50:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-10-26 04:50:16,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 3 letters. [2020-10-26 04:50:16,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 3 letters. [2020-10-26 04:50:16,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 6 letters. [2020-10-26 04:50:16,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,195 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2020-10-26 04:50:16,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:16,196 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 16 transitions. [2020-10-26 04:50:16,196 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-26 04:50:16,196 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-10-26 04:50:16,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 16 transitions. [2020-10-26 04:50:16,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:50:16,197 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-10-26 04:50:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 16 transitions. [2020-10-26 04:50:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-26 04:50:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-26 04:50:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-10-26 04:50:16,199 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-10-26 04:50:16,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:50:16,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 04:50:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-26 04:50:16,200 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 5 states. [2020-10-26 04:50:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:50:16,223 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-10-26 04:50:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 04:50:16,224 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-10-26 04:50:16,224 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:16,225 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 11 states and 12 transitions. [2020-10-26 04:50:16,225 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-26 04:50:16,225 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-26 04:50:16,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-10-26 04:50:16,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:50:16,226 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-26 04:50:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-10-26 04:50:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-10-26 04:50:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-26 04:50:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-10-26 04:50:16,231 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-26 04:50:16,231 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-26 04:50:16,231 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-26 04:50:16,231 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-10-26 04:50:16,232 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-26 04:50:16,232 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:50:16,232 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:50:16,232 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2020-10-26 04:50:16,232 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:50:16,233 INFO L794 eck$LassoCheckResult]: Stem: 235#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 231#L-1 havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 232#L28-2 assume !false; 240#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 236#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 233#L28-2 assume !false; 234#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 237#L29-2 [2020-10-26 04:50:16,233 INFO L796 eck$LassoCheckResult]: Loop: 237#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 239#L28-2 assume !false; 238#L29 assume !(main_~x~0 < 50);main_#t~post4 := main_~y~0;main_~y~0 := main_#t~post4 - 1;havoc main_#t~post4; 237#L29-2 [2020-10-26 04:50:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2020-10-26 04:50:16,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:16,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710578497] [2020-10-26 04:50:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:16,248 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:16,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:16,266 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2020-10-26 04:50:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:16,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584189701] [2020-10-26 04:50:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:16,272 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:16,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:16,277 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1054739784, now seen corresponding path program 2 times [2020-10-26 04:50:16,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:16,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464162282] [2020-10-26 04:50:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464162282] [2020-10-26 04:50:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933179533] [2020-10-26 04:50:16,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 04:50:16,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-26 04:50:16,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 04:50:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:16,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 04:50:16,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-26 04:50:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473279659] [2020-10-26 04:50:16,402 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:16,402 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:16,402 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:16,402 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:16,402 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:50:16,402 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:16,402 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:16,403 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:16,403 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2020-10-26 04:50:16,403 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:16,403 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:16,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,468 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:16,468 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-26 04:50:16,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:16,473 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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) [2020-10-26 04:50:16,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:16,517 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 [2020-10-26 04:50:16,558 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:50:16,560 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:16,561 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:16,561 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:16,561 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:16,561 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:50:16,561 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:16,561 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:16,561 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:16,561 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2020-10-26 04:50:16,561 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:16,561 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:16,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:16,619 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:16,619 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-26 04:50:16,623 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 [2020-10-26 04:50:16,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:16,625 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:16,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:16,625 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:16,625 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:16,627 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:16,627 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:16,630 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:50:16,634 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:50:16,634 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:16,638 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:50:16,638 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:50:16,638 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:50:16,638 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:16,672 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:50:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:16,741 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 [2020-10-26 04:50:16,741 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-26 04:50:16,753 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 12 states and 13 transitions. Complement of second has 5 states. [2020-10-26 04:50:16,754 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 [2020-10-26 04:50:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:50:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-10-26 04:50:16,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 7 letters. Loop has 3 letters. [2020-10-26 04:50:16,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,755 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:50:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:16,822 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-26 04:50:16,822 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-26 04:50:16,841 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 12 states and 13 transitions. Complement of second has 5 states. [2020-10-26 04:50:16,843 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 [2020-10-26 04:50:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:50:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-10-26 04:50:16,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 7 letters. Loop has 3 letters. [2020-10-26 04:50:16,844 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,844 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-26 04:50:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:16,906 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-26 04:50:16,907 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-26 04:50:16,942 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 15 states and 17 transitions. Complement of second has 4 states. [2020-10-26 04:50:16,943 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 [2020-10-26 04:50:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-26 04:50:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2020-10-26 04:50:16,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2020-10-26 04:50:16,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2020-10-26 04:50:16,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2020-10-26 04:50:16,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:16,947 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2020-10-26 04:50:16,948 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-26 04:50:16,950 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 15 transitions. [2020-10-26 04:50:16,951 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-26 04:50:16,952 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-10-26 04:50:16,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2020-10-26 04:50:16,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:50:16,954 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-10-26 04:50:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2020-10-26 04:50:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-10-26 04:50:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-26 04:50:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-10-26 04:50:16,957 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-10-26 04:50:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:50:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 04:50:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-26 04:50:16,959 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2020-10-26 04:50:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:50:17,006 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-10-26 04:50:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 04:50:17,007 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 22 transitions. [2020-10-26 04:50:17,008 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-26 04:50:17,009 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 17 states and 20 transitions. [2020-10-26 04:50:17,009 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2020-10-26 04:50:17,009 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-10-26 04:50:17,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 20 transitions. [2020-10-26 04:50:17,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-26 04:50:17,010 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-26 04:50:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 20 transitions. [2020-10-26 04:50:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-10-26 04:50:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-26 04:50:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-26 04:50:17,015 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-26 04:50:17,015 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-26 04:50:17,015 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-26 04:50:17,015 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 16 transitions. [2020-10-26 04:50:17,016 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-26 04:50:17,016 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:50:17,019 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:50:17,020 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 1, 1] [2020-10-26 04:50:17,020 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-26 04:50:17,020 INFO L794 eck$LassoCheckResult]: Stem: 469#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 463#L-1 havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 464#L28-2 assume !false; 476#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 470#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 465#L28-2 assume !false; 466#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 473#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 472#L28-2 [2020-10-26 04:50:17,021 INFO L796 eck$LassoCheckResult]: Loop: 472#L28-2 assume !false; 475#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 474#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 472#L28-2 [2020-10-26 04:50:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash 296069283, now seen corresponding path program 2 times [2020-10-26 04:50:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:17,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061826224] [2020-10-26 04:50:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:17,047 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:17,058 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:17,062 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:17,063 INFO L82 PathProgramCache]: Analyzing trace with hash 40818, now seen corresponding path program 1 times [2020-10-26 04:50:17,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:17,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458951031] [2020-10-26 04:50:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:17,068 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:17,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:17,073 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:17,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:17,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1662805104, now seen corresponding path program 3 times [2020-10-26 04:50:17,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:50:17,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962997074] [2020-10-26 04:50:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:50:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:17,087 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:50:17,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:50:17,104 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:50:17,129 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:17,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:17,130 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:17,130 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:17,130 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-26 04:50:17,130 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,130 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:17,130 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:17,130 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration4_Loop [2020-10-26 04:50:17,131 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:17,131 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:17,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,202 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:17,203 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-26 04:50:17,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:17,207 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,211 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:17,211 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:17,246 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,274 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:17,274 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:50:17,309 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-26 04:50:17,310 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0=-1} Honda state: {ULTIMATE.start_main_~y~0=-1} Generalized eigenvectors: [{ULTIMATE.start_main_~y~0=0}, {ULTIMATE.start_main_~y~0=0}, {ULTIMATE.start_main_~y~0=1}] Lambdas: [6, 0, 1] Nus: [0, 0] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-26 04:50:17,344 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,372 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-26 04:50:17,372 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-26 04:50:17,398 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-26 04:50:17,400 INFO L210 LassoAnalysis]: Preferences: [2020-10-26 04:50:17,400 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-26 04:50:17,400 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-26 04:50:17,400 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-26 04:50:17,400 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-26 04:50:17,400 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,400 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-26 04:50:17,400 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-26 04:50:17,400 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration4_Loop [2020-10-26 04:50:17,401 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-26 04:50:17,401 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-26 04:50:17,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-26 04:50:17,473 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-26 04:50:17,473 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:17,489 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 [2020-10-26 04:50:17,491 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:17,492 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:17,492 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:17,492 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:17,492 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:17,493 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:17,493 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,497 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:17,532 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 [2020-10-26 04:50:17,534 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:17,534 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:17,535 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:17,535 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:17,535 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:17,536 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:17,536 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,542 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,567 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 [2020-10-26 04:50:17,569 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-26 04:50:17,569 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-26 04:50:17,569 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-26 04:50:17,569 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-26 04:50:17,569 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-26 04:50:17,570 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-26 04:50:17,571 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-26 04:50:17,578 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-26 04:50:17,582 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-26 04:50:17,582 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-26 04:50:17,586 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-26 04:50:17,586 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-26 04:50:17,586 INFO L510 LassoAnalysis]: Proved termination. [2020-10-26 04:50:17,586 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 99 Supporting invariants [] Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-26 04:50:17,620 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-26 04:50:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:50:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 04:50:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:50:17,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 04:50:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 04:50:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:50:17,674 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 [2020-10-26 04:50:17,674 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 16 transitions. cyclomatic complexity: 3 Second operand 4 states. [2020-10-26 04:50:17,691 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 16 transitions. cyclomatic complexity: 3. Second operand 4 states. Result 26 states and 30 transitions. Complement of second has 6 states. [2020-10-26 04:50:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-26 04:50:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-26 04:50:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-26 04:50:17,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-26 04:50:17,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:17,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 11 letters. Loop has 3 letters. [2020-10-26 04:50:17,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:17,694 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 6 letters. [2020-10-26 04:50:17,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-26 04:50:17,694 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 30 transitions. [2020-10-26 04:50:17,695 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 04:50:17,695 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 0 states and 0 transitions. [2020-10-26 04:50:17,695 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-26 04:50:17,696 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-26 04:50:17,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-26 04:50:17,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:50:17,696 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:50:17,696 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:50:17,696 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 04:50:17,696 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-26 04:50:17,696 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-26 04:50:17,696 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-26 04:50:17,696 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-26 04:50:17,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 04:50:17 BoogieIcfgContainer [2020-10-26 04:50:17,703 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 04:50:17,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:50:17,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:50:17,704 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:50:17,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:50:13" (3/4) ... [2020-10-26 04:50:17,708 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 04:50:17,708 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:50:17,710 INFO L168 Benchmark]: Toolchain (without parser) took 5152.63 ms. Allocated memory was 44.0 MB in the beginning and 83.9 MB in the end (delta: 39.8 MB). Free memory was 27.2 MB in the beginning and 48.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2020-10-26 04:50:17,710 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 33.6 MB. Free memory is still 16.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:50:17,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.36 ms. Allocated memory is still 44.0 MB. Free memory was 26.6 MB in the beginning and 27.1 MB in the end (delta: -499.0 kB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-10-26 04:50:17,712 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.70 ms. Allocated memory is still 44.0 MB. Free memory was 27.0 MB in the beginning and 25.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:50:17,712 INFO L168 Benchmark]: Boogie Preprocessor took 53.21 ms. Allocated memory is still 44.0 MB. Free memory was 25.6 MB in the beginning and 24.7 MB in the end (delta: 842.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:50:17,713 INFO L168 Benchmark]: RCFGBuilder took 358.54 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 23.6 MB in the end (delta: 927.9 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:50:17,714 INFO L168 Benchmark]: BuchiAutomizer took 4389.74 ms. Allocated memory was 44.0 MB in the beginning and 83.9 MB in the end (delta: 39.8 MB). Free memory was 23.6 MB in the beginning and 49.4 MB in the end (delta: -25.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-10-26 04:50:17,715 INFO L168 Benchmark]: Witness Printer took 4.71 ms. Allocated memory is still 83.9 MB. Free memory was 49.4 MB in the beginning and 48.8 MB in the end (delta: 634.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:50:17,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 33.6 MB. Free memory is still 16.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.36 ms. Allocated memory is still 44.0 MB. Free memory was 26.6 MB in the beginning and 27.1 MB in the end (delta: -499.0 kB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.70 ms. Allocated memory is still 44.0 MB. Free memory was 27.0 MB in the beginning and 25.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.21 ms. Allocated memory is still 44.0 MB. Free memory was 25.6 MB in the beginning and 24.7 MB in the end (delta: 842.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 358.54 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 23.6 MB in the end (delta: 927.9 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4389.74 ms. Allocated memory was 44.0 MB in the beginning and 83.9 MB in the end (delta: 39.8 MB). Free memory was 23.6 MB in the beginning and 49.4 MB in the end (delta: -25.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.71 ms. Allocated memory is still 83.9 MB. Free memory was 49.4 MB in the beginning and 48.8 MB in the end (delta: 634.1 kB). There was no memory consumed. Max. memory is 16.1 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, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 5 locations. One deterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. One deterministic module has affine ranking function -2 * x + 99 and consists of 4 locations. One nondeterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.3s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 3.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 50 SDtfs, 44 SDslu, 26 SDs, 0 SdLazy, 64 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf91 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 22ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...