./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-numeric/gcd01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-numeric/gcd01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 35b25a6a3a2357b1d567ba04985a13ceb918bed2 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:34:59,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:34:59,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:34:59,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:34:59,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:34:59,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:34:59,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:34:59,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:34:59,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:34:59,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:34:59,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:34:59,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:34:59,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:34:59,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:34:59,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:34:59,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:34:59,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:34:59,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:34:59,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:34:59,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:34:59,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:34:59,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:34:59,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:34:59,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:34:59,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:34:59,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:34:59,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:34:59,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:34:59,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:34:59,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:34:59,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:34:59,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:34:59,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:34:59,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:34:59,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:34:59,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:34:59,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:34:59,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:34:59,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:34:59,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:34:59,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:34:59,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:35:00,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:35:00,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:35:00,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:35:00,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:35:00,023 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:35:00,023 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:35:00,023 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:35:00,024 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:35:00,024 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:35:00,024 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:35:00,025 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:35:00,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:35:00,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:35:00,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:35:00,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:35:00,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:35:00,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:35:00,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:35:00,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:35:00,029 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:35:00,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:35:00,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:35:00,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:35:00,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:35:00,031 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:35:00,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:35:00,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:35:00,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:35:00,032 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:35:00,034 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:35:00,034 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35b25a6a3a2357b1d567ba04985a13ceb918bed2 [2020-10-20 06:35:00,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:35:00,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:35:00,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:35:00,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:35:00,314 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:35:00,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/gcd01-2.c [2020-10-20 06:35:00,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70819f63c/56812713d65e442b84c86c48f098809b/FLAG60e277535 [2020-10-20 06:35:00,906 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:35:00,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/gcd01-2.c [2020-10-20 06:35:00,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70819f63c/56812713d65e442b84c86c48f098809b/FLAG60e277535 [2020-10-20 06:35:01,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70819f63c/56812713d65e442b84c86c48f098809b [2020-10-20 06:35:01,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:35:01,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:35:01,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:35:01,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:35:01,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:35:01,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd96646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01, skipping insertion in model container [2020-10-20 06:35:01,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:35:01,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:35:01,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:35:01,598 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:35:01,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:35:01,645 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:35:01,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01 WrapperNode [2020-10-20 06:35:01,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:35:01,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:35:01,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:35:01,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:35:01,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:35:01,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:35:01,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:35:01,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:35:01,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... [2020-10-20 06:35:01,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:35:01,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:35:01,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:35:01,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:35:01,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:01,800 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-20 06:35:01,801 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-20 06:35:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:35:01,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:35:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:35:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:35:02,051 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:35:02,051 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 06:35:02,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:02 BoogieIcfgContainer [2020-10-20 06:35:02,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:35:02,057 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:35:02,059 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:35:02,068 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:35:02,070 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:02,070 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:35:01" (1/3) ... [2020-10-20 06:35:02,074 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@12db4ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:35:02, skipping insertion in model container [2020-10-20 06:35:02,075 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:02,075 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:35:01" (2/3) ... [2020-10-20 06:35:02,075 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@12db4ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:35:02, skipping insertion in model container [2020-10-20 06:35:02,076 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:35:02,076 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:02" (3/3) ... [2020-10-20 06:35:02,077 INFO L373 chiAutomizerObserver]: Analyzing ICFG gcd01-2.c [2020-10-20 06:35:02,152 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:35:02,152 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:35:02,152 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:35:02,153 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:35:02,153 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:35:02,153 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:35:02,154 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:35:02,154 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:35:02,174 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-10-20 06:35:02,207 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-20 06:35:02,207 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:02,207 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:02,217 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:02,218 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:02,218 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:35:02,218 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-10-20 06:35:02,224 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-20 06:35:02,224 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:02,225 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:02,225 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:02,225 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:02,236 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 15#L32true assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 24#L36true assume !(main_~n~0 <= 0); 8#L39true call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 3#gcdENTRYtrue [2020-10-20 06:35:02,236 INFO L796 eck$LassoCheckResult]: Loop: 3#gcdENTRYtrue ~y1 := #in~y1;~y2 := #in~y2; 13#L18true assume !(~y1 <= 0 || ~y2 <= 0); 10#L21true assume !(~y1 == ~y2); 4#L24true assume ~y1 > ~y2; 7#L25true call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 3#gcdENTRYtrue [2020-10-20 06:35:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash 45873353, now seen corresponding path program 1 times [2020-10-20 06:35:02,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:02,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070645054] [2020-10-20 06:35:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:02,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:02,391 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:02,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash 28756389, now seen corresponding path program 1 times [2020-10-20 06:35:02,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:02,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785973424] [2020-10-20 06:35:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:02,428 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:02,434 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:02,436 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash 50269661, now seen corresponding path program 1 times [2020-10-20 06:35:02,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:02,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683275686] [2020-10-20 06:35:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:02,470 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:02,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:02,507 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:02,681 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:02,682 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:02,682 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:02,682 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:02,683 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:02,683 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:02,683 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:02,683 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:02,683 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2020-10-20 06:35:02,683 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:02,684 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:02,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:02,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:02,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:02,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:02,743 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:02,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:02,827 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:02,828 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:02,849 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:02,849 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:02,860 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:02,861 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#res=0} Honda state: {gcd_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:02,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:02,922 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) [2020-10-20 06:35:02,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:02,967 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 [2020-10-20 06:35:03,137 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:03,139 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:03,140 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:03,140 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:03,140 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:03,140 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:03,140 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:03,140 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:03,140 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:03,141 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2020-10-20 06:35:03,141 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:03,141 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:03,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:03,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:03,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:03,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:03,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:03,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:03,262 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:03,271 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 06:35:03,299 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:03,302 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:03,302 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:03,303 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:03,303 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:03,304 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:03,307 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:03,308 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:03,312 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:03,362 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:03,365 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:03,365 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:03,365 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:03,365 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:03,366 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:03,368 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:03,369 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:03,374 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:03,425 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:03,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:03,429 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:03,440 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:03,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:03,440 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:03,444 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:03,445 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 [2020-10-20 06:35:03,449 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:03,465 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:35:03,465 INFO L444 ModelExtractionUtils]: 1 out of 4 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:03,486 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:03,486 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:03,486 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:03,487 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y1) = 1*gcd_#in~y1 Supporting invariants [] [2020-10-20 06:35:03,529 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:03,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:35:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:35:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:03,701 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-10-20 06:35:03,703 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 5 states. [2020-10-20 06:35:03,958 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 5 states. Result 95 states and 131 transitions. Complement of second has 30 states. [2020-10-20 06:35:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 06:35:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 06:35:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 25 transitions. [2020-10-20 06:35:03,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 5 letters. [2020-10-20 06:35:03,968 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:03,969 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 10 letters. Loop has 5 letters. [2020-10-20 06:35:03,969 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:03,969 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 10 letters. [2020-10-20 06:35:03,970 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:03,971 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 131 transitions. [2020-10-20 06:35:03,981 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:03,988 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 36 states and 41 transitions. [2020-10-20 06:35:03,990 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-20 06:35:03,990 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2020-10-20 06:35:03,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 41 transitions. [2020-10-20 06:35:03,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:03,992 INFO L691 BuchiCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-20 06:35:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 41 transitions. [2020-10-20 06:35:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2020-10-20 06:35:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 06:35:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-20 06:35:04,029 INFO L714 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-20 06:35:04,029 INFO L594 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-20 06:35:04,029 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:35:04,029 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 21 transitions. [2020-10-20 06:35:04,030 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:04,030 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:04,031 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:04,031 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-20 06:35:04,031 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:04,032 INFO L794 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 205#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 206#L32 assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 218#L36 assume !(main_~n~0 <= 0); 210#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 222#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-10-20 06:35:04,032 INFO L796 eck$LassoCheckResult]: Loop: 207#L18 assume !(~y1 <= 0 || ~y2 <= 0); 209#L21 assume !(~y1 == ~y2); 219#L24 assume !(~y1 > ~y2); 208#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 215#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-10-20 06:35:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1422073943, now seen corresponding path program 1 times [2020-10-20 06:35:04,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:04,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438041070] [2020-10-20 06:35:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:04,058 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:04,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:04,076 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:04,077 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 1 times [2020-10-20 06:35:04,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:04,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315692342] [2020-10-20 06:35:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:04,085 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:04,089 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:04,092 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1558362436, now seen corresponding path program 1 times [2020-10-20 06:35:04,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:04,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407082822] [2020-10-20 06:35:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:04,128 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:04,160 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:04,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:04,259 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:04,260 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:04,260 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:04,260 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:04,260 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:04,260 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:04,260 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:04,261 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:04,261 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2020-10-20 06:35:04,261 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:04,261 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:04,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:04,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:04,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:04,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:04,408 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:04,408 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:04,415 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:04,415 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:04,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:04,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:06,385 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:06,388 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:06,388 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:06,388 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:06,388 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:06,388 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:06,388 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:06,389 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:06,389 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:06,389 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2020-10-20 06:35:06,389 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:06,389 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:06,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:06,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:06,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:06,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:06,533 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-10-20 06:35:06,565 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:06,565 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:06,569 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:06,571 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:06,571 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:06,571 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:06,571 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:06,571 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:06,574 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:06,574 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:35:06,579 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:06,591 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:35:06,591 INFO L444 ModelExtractionUtils]: 3 out of 6 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:06,602 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:06,602 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:06,603 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:06,603 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [2020-10-20 06:35:06,636 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:35:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:35:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:06,804 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:35:06,804 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-10-20 06:35:06,837 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 54 states and 61 transitions. Complement of second has 11 states. [2020-10-20 06:35:06,837 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 [2020-10-20 06:35:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-20 06:35:06,839 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 5 letters. [2020-10-20 06:35:06,839 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:06,839 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-20 06:35:06,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:06,840 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 10 letters. [2020-10-20 06:35:06,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:06,840 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 61 transitions. [2020-10-20 06:35:06,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:06,844 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 33 states and 37 transitions. [2020-10-20 06:35:06,844 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-20 06:35:06,844 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-20 06:35:06,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 37 transitions. [2020-10-20 06:35:06,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:35:06,845 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-20 06:35:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 37 transitions. [2020-10-20 06:35:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-20 06:35:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 06:35:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-20 06:35:06,849 INFO L714 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-20 06:35:06,849 INFO L594 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-20 06:35:06,849 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:35:06,849 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 28 transitions. [2020-10-20 06:35:06,850 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 06:35:06,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:35:06,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:35:06,851 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:35:06,851 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:35:06,851 INFO L794 eck$LassoCheckResult]: Stem: 353#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 339#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 340#L32 assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 354#L36 assume !(main_~n~0 <= 0); 342#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 341#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 343#L18 assume !(~y1 <= 0 || ~y2 <= 0); 358#L21 assume !(~y1 == ~y2); 356#L24 assume ~y1 > ~y2; 347#L25 call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 357#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-10-20 06:35:06,851 INFO L796 eck$LassoCheckResult]: Loop: 346#L18 assume !(~y1 <= 0 || ~y2 <= 0); 349#L21 assume !(~y1 == ~y2); 355#L24 assume !(~y1 > ~y2); 348#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 359#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-10-20 06:35:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:06,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1558359491, now seen corresponding path program 2 times [2020-10-20 06:35:06,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:06,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810237135] [2020-10-20 06:35:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:06,871 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:06,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:06,900 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 2 times [2020-10-20 06:35:06,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:06,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87013949] [2020-10-20 06:35:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:06,906 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:06,909 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:06,911 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash -474042536, now seen corresponding path program 1 times [2020-10-20 06:35:06,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:35:06,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892534735] [2020-10-20 06:35:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:35:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:06,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:35:06,941 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:35:06,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:35:07,043 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:07,044 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:07,044 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:07,044 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:07,044 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:35:07,044 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:07,044 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:07,045 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:07,045 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2020-10-20 06:35:07,045 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:07,045 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:07,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,147 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:07,147 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:07,159 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:07,159 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:07,164 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:35:07,164 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#t~ret7=0} Honda state: {gcd_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:07,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:35:07,211 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:07,261 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:35:07,261 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:35:07,750 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:35:07,753 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:35:07,753 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:35:07,753 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:35:07,753 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:35:07,753 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:35:07,753 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:07,753 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:35:07,753 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:35:07,762 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2020-10-20 06:35:07,762 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:35:07,762 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:35:07,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:35:07,887 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:35:07,887 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:07,891 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:07,892 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:07,892 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:07,893 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:07,893 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:07,893 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:07,893 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:07,894 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:35:07,896 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 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:07,920 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 06:35:07,922 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:35:07,922 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:35:07,923 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:35:07,923 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:35:07,923 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:35:07,925 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:35:07,925 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:35:07,929 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:35:07,940 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 06:35:07,940 INFO L444 ModelExtractionUtils]: 4 out of 6 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:35:07,961 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:35:07,961 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:35:07,961 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:35:07,961 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:35:08,008 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:35:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:35:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:35:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:08,158 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:35:08,158 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-20 06:35:08,197 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 46 states and 51 transitions. Complement of second has 11 states. [2020-10-20 06:35:08,198 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 [2020-10-20 06:35:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-20 06:35:08,199 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-20 06:35:08,199 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:08,199 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:35:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:08,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:35:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:35:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:08,288 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 06:35:08,288 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-20 06:35:08,310 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 46 states and 51 transitions. Complement of second has 11 states. [2020-10-20 06:35:08,310 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 [2020-10-20 06:35:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-20 06:35:08,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-20 06:35:08,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:08,312 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:35:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:35:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:35:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:35:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:35:08,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:35:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:35:08,415 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 3 loop predicates [2020-10-20 06:35:08,415 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-20 06:35:08,461 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 75 states and 86 transitions. Complement of second has 12 states. [2020-10-20 06:35:08,468 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 [2020-10-20 06:35:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:35:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-20 06:35:08,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-20 06:35:08,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:08,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 16 letters. Loop has 5 letters. [2020-10-20 06:35:08,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:08,471 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 10 letters. [2020-10-20 06:35:08,471 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:35:08,472 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 86 transitions. [2020-10-20 06:35:08,477 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:35:08,478 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 0 states and 0 transitions. [2020-10-20 06:35:08,478 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:35:08,478 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:35:08,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:35:08,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:35:08,478 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:35:08,478 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:35:08,478 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:35:08,478 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:35:08,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:35:08,479 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:35:08,479 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 06:35:08,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:35:08 BoogieIcfgContainer [2020-10-20 06:35:08,496 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:35:08,497 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:35:08,497 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:35:08,497 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:35:08,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:35:02" (3/4) ... [2020-10-20 06:35:08,501 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:35:08,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:35:08,504 INFO L168 Benchmark]: Toolchain (without parser) took 7216.50 ms. Allocated memory was 35.7 MB in the beginning and 58.7 MB in the end (delta: 23.1 MB). Free memory was 15.9 MB in the beginning and 22.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,510 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 34.1 MB. Free memory was 9.9 MB in the beginning and 9.9 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,512 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.79 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.1 MB in the beginning and 25.7 MB in the end (delta: -10.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,513 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 44.0 MB. Free memory was 25.7 MB in the beginning and 24.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,516 INFO L168 Benchmark]: Boogie Preprocessor took 39.52 ms. Allocated memory is still 44.0 MB. Free memory was 24.1 MB in the beginning and 22.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,517 INFO L168 Benchmark]: RCFGBuilder took 328.15 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 22.9 MB in the beginning and 21.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,519 INFO L168 Benchmark]: BuchiAutomizer took 6439.20 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 21.4 MB in the beginning and 23.1 MB in the end (delta: -1.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:35:08,520 INFO L168 Benchmark]: Witness Printer took 4.52 ms. Allocated memory is still 58.7 MB. Free memory is still 22.5 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:35:08,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 34.1 MB. Free memory was 9.9 MB in the beginning and 9.9 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 353.79 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.1 MB in the beginning and 25.7 MB in the end (delta: -10.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 44.0 MB. Free memory was 25.7 MB in the beginning and 24.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 39.52 ms. Allocated memory is still 44.0 MB. Free memory was 24.1 MB in the beginning and 22.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 328.15 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 22.9 MB in the beginning and 21.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 6439.20 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 21.4 MB in the beginning and 23.1 MB in the end (delta: -1.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. * Witness Printer took 4.52 ms. Allocated memory is still 58.7 MB. Free memory is still 22.5 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(y1) and consists of 7 locations. One deterministic module has affine ranking function y2 and consists of 4 locations. One nondeterministic module has affine ranking function y2 and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.3s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 5.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 26 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 52 SDtfs, 77 SDslu, 9 SDs, 0 SdLazy, 124 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital26 mio100 ax100 hnf85 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq177 hnf91 smp89 dnf100 smp100 tf106 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 39ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...