./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/bitvector/gcd_4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c20edfd7ede05443471560aa2c7be34d4e8c171 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 14:36:53,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:36:53,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:36:53,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:36:53,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:36:53,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:36:53,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:36:53,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:36:53,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:36:53,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:36:53,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:36:53,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:36:53,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:36:53,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:36:53,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:36:53,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:36:53,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:36:53,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:36:53,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:36:53,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:36:53,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:36:53,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:36:53,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:36:53,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:36:53,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:36:53,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:36:53,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:36:53,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:36:53,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:36:53,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:36:53,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:36:53,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:36:53,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:36:53,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:36:53,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:36:53,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:36:53,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:36:53,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:36:53,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:36:53,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:36:53,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:36:53,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 14:36:53,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:36:53,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:36:53,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:36:53,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:36:53,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:36:53,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:36:53,918 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:36:53,918 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:36:53,918 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:36:53,918 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:36:53,919 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:36:53,919 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:36:53,919 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:36:53,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:36:53,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 14:36:53,920 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:36:53,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:36:53,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 14:36:53,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:36:53,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:36:53,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:36:53,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:36:53,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:36:53,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:36:53,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:36:53,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:36:53,929 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:36:53,930 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2021-08-27 14:36:54,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:36:54,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:36:54,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:36:54,173 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:36:54,174 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:36:54,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_4.c [2021-08-27 14:36:54,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231dbb4d4/85562b20e9b24e9da74d46d2184eac4d/FLAG344fe207b [2021-08-27 14:36:54,587 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:36:54,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c [2021-08-27 14:36:54,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231dbb4d4/85562b20e9b24e9da74d46d2184eac4d/FLAG344fe207b [2021-08-27 14:36:54,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231dbb4d4/85562b20e9b24e9da74d46d2184eac4d [2021-08-27 14:36:54,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:36:54,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:36:54,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:36:54,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:36:54,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:36:54,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e6f213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54, skipping insertion in model container [2021-08-27 14:36:54,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:36:54,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:36:54,760 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-08-27 14:36:54,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:36:54,778 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:36:54,786 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-08-27 14:36:54,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:36:54,807 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:36:54,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54 WrapperNode [2021-08-27 14:36:54,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:36:54,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:36:54,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:36:54,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:36:54,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:36:54,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:36:54,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:36:54,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:36:54,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:36:54,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:36:54,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:36:54,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:36:54,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (1/1) ... [2021-08-27 14:36:54,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:54,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:54,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 14:36:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 14:36:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 14:36:54,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:36:54,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:36:55,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:36:55,136 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-27 14:36:55,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:36:55 BoogieIcfgContainer [2021-08-27 14:36:55,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:36:55,138 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:36:55,138 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:36:55,140 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:36:55,140 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:36:55,141 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:36:54" (1/3) ... [2021-08-27 14:36:55,141 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@242daa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:36:55, skipping insertion in model container [2021-08-27 14:36:55,141 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:36:55,142 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:36:54" (2/3) ... [2021-08-27 14:36:55,142 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@242daa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:36:55, skipping insertion in model container [2021-08-27 14:36:55,142 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:36:55,142 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:36:55" (3/3) ... [2021-08-27 14:36:55,143 INFO L389 chiAutomizerObserver]: Analyzing ICFG gcd_4.c [2021-08-27 14:36:55,170 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:36:55,170 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:36:55,170 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:36:55,170 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:36:55,170 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:36:55,171 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:36:55,171 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:36:55,171 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:36:55,179 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,190 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,190 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:55,190 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:55,194 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 14:36:55,208 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:55,209 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:36:55,209 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,210 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,211 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:55,211 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:55,211 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 14:36:55,211 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:55,215 INFO L791 eck$LassoCheckResult]: Stem: 4#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 9#L-1true havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 11#L14true assume !(gcd_test_~a < 0); 22#L14-2true assume !(gcd_test_~b < 0); 20#L15-1true assume !(0 == gcd_test_~a); 10#L22-2true [2021-08-27 14:36:55,216 INFO L793 eck$LassoCheckResult]: Loop: 10#L22-2true assume !!(0 != gcd_test_~b); 14#L22true assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 10#L22-2true [2021-08-27 14:36:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash 28695882, now seen corresponding path program 1 times [2021-08-27 14:36:55,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921382129] [2021-08-27 14:36:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,337 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,375 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 1 times [2021-08-27 14:36:55,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945765084] [2021-08-27 14:36:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,381 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,385 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1806939727, now seen corresponding path program 1 times [2021-08-27 14:36:55,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466046352] [2021-08-27 14:36:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:55,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:55,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466046352] [2021-08-27 14:36:55,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466046352] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:36:55,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:36:55,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 14:36:55,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238692306] [2021-08-27 14:36:55,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 14:36:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 14:36:55,510 INFO L87 Difference]: Start difference. First operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:55,557 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-27 14:36:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 14:36:55,559 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 38 states and 41 transitions. [2021-08-27 14:36:55,564 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,568 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 38 states to 10 states and 12 transitions. [2021-08-27 14:36:55,568 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-08-27 14:36:55,569 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-08-27 14:36:55,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 12 transitions. [2021-08-27 14:36:55,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:36:55,569 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-08-27 14:36:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 12 transitions. [2021-08-27 14:36:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-27 14:36:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-08-27 14:36:55,585 INFO L704 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-08-27 14:36:55,586 INFO L587 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-08-27 14:36:55,586 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 14:36:55,586 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2021-08-27 14:36:55,586 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,586 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:55,586 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:55,587 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 14:36:55,587 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:55,587 INFO L791 eck$LassoCheckResult]: Stem: 72#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 73#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 75#L14 assume !(gcd_test_~a < 0); 77#L14-2 assume gcd_test_~b < 0;gcd_test_~b := -gcd_test_~b; 74#L15-1 assume !(0 == gcd_test_~a); 71#L22-2 [2021-08-27 14:36:55,587 INFO L793 eck$LassoCheckResult]: Loop: 71#L22-2 assume !!(0 != gcd_test_~b); 76#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 71#L22-2 [2021-08-27 14:36:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,588 INFO L82 PathProgramCache]: Analyzing trace with hash 28695820, now seen corresponding path program 1 times [2021-08-27 14:36:55,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442915928] [2021-08-27 14:36:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:55,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:55,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442915928] [2021-08-27 14:36:55,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442915928] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:36:55,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 14:36:55,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 14:36:55,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189663605] [2021-08-27 14:36:55,627 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 14:36:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 2 times [2021-08-27 14:36:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201785412] [2021-08-27 14:36:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,631 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,634 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:55,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:55,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 14:36:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 14:36:55,666 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:55,678 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2021-08-27 14:36:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 14:36:55,679 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-08-27 14:36:55,681 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2021-08-27 14:36:55,681 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 13 transitions. [2021-08-27 14:36:55,681 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 14:36:55,681 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 14:36:55,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 13 transitions. [2021-08-27 14:36:55,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:36:55,682 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-08-27 14:36:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 13 transitions. [2021-08-27 14:36:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2021-08-27 14:36:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-27 14:36:55,683 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-27 14:36:55,684 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-27 14:36:55,684 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 14:36:55,684 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2021-08-27 14:36:55,685 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:55,685 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:55,685 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 14:36:55,686 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:55,686 INFO L791 eck$LassoCheckResult]: Stem: 99#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 100#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 103#L14 assume !(gcd_test_~a < 0); 105#L14-2 assume !(gcd_test_~b < 0); 101#L15-1 assume !(0 == gcd_test_~a); 102#L22-2 assume !!(0 != gcd_test_~b); 97#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 98#L22-2 [2021-08-27 14:36:55,686 INFO L793 eck$LassoCheckResult]: Loop: 98#L22-2 assume !!(0 != gcd_test_~b); 104#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 98#L22-2 [2021-08-27 14:36:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1806939725, now seen corresponding path program 1 times [2021-08-27 14:36:55,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78471302] [2021-08-27 14:36:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,706 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,715 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 3 times [2021-08-27 14:36:55,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216669930] [2021-08-27 14:36:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,719 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,722 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1302289042, now seen corresponding path program 1 times [2021-08-27 14:36:55,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364304479] [2021-08-27 14:36:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:55,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:55,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364304479] [2021-08-27 14:36:55,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364304479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:55,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231221628] [2021-08-27 14:36:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 14:36:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:55,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 14:36:55,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 14:36:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 14:36:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:55,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231221628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:55,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 14:36:55,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-27 14:36:55,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67716710] [2021-08-27 14:36:55,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:55,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 14:36:55,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-27 14:36:55,949 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:55,971 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-08-27 14:36:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 14:36:55,971 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2021-08-27 14:36:55,972 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2021-08-27 14:36:55,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 14:36:55,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 14:36:55,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2021-08-27 14:36:55,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:36:55,972 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-27 14:36:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2021-08-27 14:36:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-27 14:36:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-27 14:36:55,974 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-27 14:36:55,974 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-27 14:36:55,974 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 14:36:55,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2021-08-27 14:36:55,974 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:55,974 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:55,975 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:55,975 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2021-08-27 14:36:55,975 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:55,975 INFO L791 eck$LassoCheckResult]: Stem: 156#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 157#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 161#L14 assume !(gcd_test_~a < 0); 162#L14-2 assume !(gcd_test_~b < 0); 158#L15-1 assume !(0 == gcd_test_~a); 159#L22-2 assume !!(0 != gcd_test_~b); 154#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 155#L22-2 assume !!(0 != gcd_test_~b); 160#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 164#L22-2 [2021-08-27 14:36:55,975 INFO L793 eck$LassoCheckResult]: Loop: 164#L22-2 assume !!(0 != gcd_test_~b); 163#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 164#L22-2 [2021-08-27 14:36:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1302289040, now seen corresponding path program 2 times [2021-08-27 14:36:55,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643058393] [2021-08-27 14:36:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,984 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,992 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 4 times [2021-08-27 14:36:55,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:55,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799031784] [2021-08-27 14:36:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:55,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:55,998 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,004 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1664285205, now seen corresponding path program 2 times [2021-08-27 14:36:56,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:56,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095098830] [2021-08-27 14:36:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:56,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:56,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:56,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095098830] [2021-08-27 14:36:56,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095098830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:56,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585168212] [2021-08-27 14:36:56,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 14:36:56,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 14:36:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:56,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 14:36:56,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 14:36:56,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 14:36:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 14:36:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 14:36:56,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:56,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585168212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:56,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 14:36:56,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-27 14:36:56,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613151156] [2021-08-27 14:36:56,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:56,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 14:36:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-27 14:36:56,206 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:56,249 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-08-27 14:36:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 14:36:56,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2021-08-27 14:36:56,250 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:56,253 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2021-08-27 14:36:56,254 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-08-27 14:36:56,254 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-08-27 14:36:56,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2021-08-27 14:36:56,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:36:56,255 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-27 14:36:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2021-08-27 14:36:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-27 14:36:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-08-27 14:36:56,257 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-27 14:36:56,257 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-27 14:36:56,257 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 14:36:56,257 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2021-08-27 14:36:56,258 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:56,259 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:56,259 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:56,259 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1, 1] [2021-08-27 14:36:56,259 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:56,259 INFO L791 eck$LassoCheckResult]: Stem: 227#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 228#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 231#L14 assume !(gcd_test_~a < 0); 233#L14-2 assume !(gcd_test_~b < 0); 229#L15-1 assume !(0 == gcd_test_~a); 230#L22-2 assume !!(0 != gcd_test_~b); 225#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 226#L22-2 assume !!(0 != gcd_test_~b); 232#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 237#L22-2 assume !!(0 != gcd_test_~b); 236#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 235#L22-2 [2021-08-27 14:36:56,259 INFO L793 eck$LassoCheckResult]: Loop: 235#L22-2 assume !!(0 != gcd_test_~b); 234#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 235#L22-2 [2021-08-27 14:36:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:56,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1664285203, now seen corresponding path program 3 times [2021-08-27 14:36:56,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:56,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450705156] [2021-08-27 14:36:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:56,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,284 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,302 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 5 times [2021-08-27 14:36:56,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:56,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584657948] [2021-08-27 14:36:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:56,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,310 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,315 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:56,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1650246872, now seen corresponding path program 3 times [2021-08-27 14:36:56,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:56,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289604627] [2021-08-27 14:36:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:56,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,339 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:56,349 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:56,673 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 14:36:56,674 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 14:36:56,674 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 14:36:56,674 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 14:36:56,674 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 14:36:56,674 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:56,674 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 14:36:56,674 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 14:36:56,674 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd_4.c_Iteration5_Lasso [2021-08-27 14:36:56,674 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 14:36:56,674 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 14:36:56,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 14:36:56,960 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 14:36:56,963 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 14:36:56,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:56,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:56,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:56,993 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,000 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,001 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,004 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,004 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 14:36:57,021 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,059 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 14:36:57,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,069 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 14:36:57,069 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,069 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,069 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,070 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 14:36:57,070 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 14:36:57,080 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-08-27 14:36:57,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 14:36:57,101 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,108 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,108 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,108 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,110 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,110 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,136 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-08-27 14:36:57,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 14:36:57,163 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,169 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,169 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,169 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,169 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,171 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,171 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,188 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 14:36:57,207 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,213 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,213 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,213 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,213 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,217 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,217 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,227 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 14:36:57,249 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,256 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,256 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,256 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,256 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,258 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,258 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,271 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 14:36:57,292 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,298 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,300 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,300 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,303 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 14:36:57,323 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,330 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,330 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,330 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,330 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,331 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,332 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,342 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 14:36:57,362 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,368 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,368 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,368 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,368 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,370 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,370 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,390 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 14:36:57,410 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,418 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,418 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,420 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-08-27 14:36:57,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,437 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 14:36:57,439 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,445 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,446 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,446 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,446 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,448 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,448 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,451 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,468 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 14:36:57,469 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,476 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,476 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,477 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,477 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,480 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 14:36:57,499 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,505 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,505 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,505 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,505 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,507 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,507 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,519 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,535 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 14:36:57,537 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,544 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 14:36:57,544 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,545 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 14:36:57,545 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 14:36:57,548 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 14:36:57,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,583 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 14:36:57,585 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 14:36:57,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 14:36:57,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 14:36:57,592 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-27 14:36:57,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 14:36:57,602 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2021-08-27 14:36:57,602 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-08-27 14:36:57,637 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 14:36:57,668 INFO L443 ModelExtractionUtils]: Simplification made 14 calls to the SMT solver. [2021-08-27 14:36:57,668 INFO L444 ModelExtractionUtils]: 21 out of 36 variables were initially zero. Simplification set additionally 9 variables to zero. [2021-08-27 14:36:57,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:36:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:57,687 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 14:36:57,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 14:36:57,723 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 14:36:57,746 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2021-08-27 14:36:57,746 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 14:36:57,747 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_gcd_test_~b) = 1*ULTIMATE.start_gcd_test_~b Supporting invariants [1*ULTIMATE.start_gcd_test_~a - 2 >= 0] [2021-08-27 14:36:57,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:57,778 INFO L297 tatePredicateManager]: 7 out of 8 supporting invariants were superfluous and have been removed [2021-08-27 14:36:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 14:36:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:57,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 14:36:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:57,957 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.4 stem predicates 1 loop predicates [2021-08-27 14:36:57,958 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,015 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 14 states and 15 transitions. Complement of second has 6 states. [2021-08-27 14:36:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:36:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-08-27 14:36:58,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 11 letters. Loop has 2 letters. [2021-08-27 14:36:58,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:36:58,018 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 14:36:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 14:36:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:58,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:58,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 14:36:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:58,198 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.4 stem predicates 1 loop predicates [2021-08-27 14:36:58,199 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,238 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 14 states and 15 transitions. Complement of second has 6 states. [2021-08-27 14:36:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 14:36:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-08-27 14:36:58,239 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 11 letters. Loop has 2 letters. [2021-08-27 14:36:58,239 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:36:58,239 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 14:36:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 14:36:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:58,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 14:36:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:58,408 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.4 stem predicates 1 loop predicates [2021-08-27 14:36:58,408 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,484 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 25 transitions. Complement of second has 12 states. [2021-08-27 14:36:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 4 stem states 1 non-accepting loop states 2 accepting loop states [2021-08-27 14:36:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 20 transitions. [2021-08-27 14:36:58,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 11 letters. Loop has 2 letters. [2021-08-27 14:36:58,485 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:36:58,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 13 letters. Loop has 2 letters. [2021-08-27 14:36:58,485 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:36:58,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 11 letters. Loop has 4 letters. [2021-08-27 14:36:58,485 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 14:36:58,485 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 25 transitions. [2021-08-27 14:36:58,486 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 14:36:58,486 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 19 states and 23 transitions. [2021-08-27 14:36:58,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-08-27 14:36:58,486 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-08-27 14:36:58,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 23 transitions. [2021-08-27 14:36:58,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:36:58,487 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-08-27 14:36:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 23 transitions. [2021-08-27 14:36:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-08-27 14:36:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-08-27 14:36:58,488 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-08-27 14:36:58,488 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-08-27 14:36:58,488 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-27 14:36:58,488 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 20 transitions. [2021-08-27 14:36:58,489 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:58,489 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:58,489 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:58,489 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1, 1, 1] [2021-08-27 14:36:58,489 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:58,489 INFO L791 eck$LassoCheckResult]: Stem: 510#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 511#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 515#L14 assume !(gcd_test_~a < 0); 516#L14-2 assume !(gcd_test_~b < 0); 512#L15-1 assume !(0 == gcd_test_~a); 513#L22-2 assume !!(0 != gcd_test_~b); 522#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 521#L22-2 assume !!(0 != gcd_test_~b); 520#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 519#L22-2 assume !!(0 != gcd_test_~b); 518#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 517#L22-2 assume !!(0 != gcd_test_~b); 506#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 507#L22-2 [2021-08-27 14:36:58,489 INFO L793 eck$LassoCheckResult]: Loop: 507#L22-2 assume !!(0 != gcd_test_~b); 514#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 507#L22-2 [2021-08-27 14:36:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1650246870, now seen corresponding path program 4 times [2021-08-27 14:36:58,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:58,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867933558] [2021-08-27 14:36:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:58,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:58,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:58,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867933558] [2021-08-27 14:36:58,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867933558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:58,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622374029] [2021-08-27 14:36:58,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 14:36:58,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 14:36:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:58,525 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 14:36:58,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 14:36:58,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 14:36:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 14:36:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 14:36:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622374029] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 14:36:58,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 14:36:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-08-27 14:36:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528115662] [2021-08-27 14:36:58,721 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 14:36:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:58,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 6 times [2021-08-27 14:36:58,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:58,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691776974] [2021-08-27 14:36:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:58,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:58,724 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:58,726 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:58,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 14:36:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-27 14:36:58,741 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:58,760 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-08-27 14:36:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 14:36:58,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 21 transitions. [2021-08-27 14:36:58,761 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:58,761 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 18 states and 20 transitions. [2021-08-27 14:36:58,761 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2021-08-27 14:36:58,761 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-08-27 14:36:58,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 20 transitions. [2021-08-27 14:36:58,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:36:58,761 INFO L681 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-27 14:36:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 20 transitions. [2021-08-27 14:36:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-08-27 14:36:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-27 14:36:58,763 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-27 14:36:58,763 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-27 14:36:58,763 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-08-27 14:36:58,763 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 19 transitions. [2021-08-27 14:36:58,763 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:58,763 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:58,763 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:58,764 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 1, 1, 1, 1, 1, 1] [2021-08-27 14:36:58,764 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:58,764 INFO L791 eck$LassoCheckResult]: Stem: 595#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(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 596#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 600#L14 assume !(gcd_test_~a < 0); 601#L14-2 assume !(gcd_test_~b < 0); 597#L15-1 assume !(0 == gcd_test_~a); 598#L22-2 assume !!(0 != gcd_test_~b); 607#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 606#L22-2 assume !!(0 != gcd_test_~b); 605#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 604#L22-2 assume !!(0 != gcd_test_~b); 603#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 602#L22-2 assume !!(0 != gcd_test_~b); 593#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 594#L22-2 assume !!(0 != gcd_test_~b); 591#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 592#L22-2 [2021-08-27 14:36:58,764 INFO L793 eck$LassoCheckResult]: Loop: 592#L22-2 assume !!(0 != gcd_test_~b); 599#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 592#L22-2 [2021-08-27 14:36:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1044312667, now seen corresponding path program 4 times [2021-08-27 14:36:58,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:58,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645670603] [2021-08-27 14:36:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:58,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:58,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:58,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645670603] [2021-08-27 14:36:58,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645670603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:58,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923213524] [2021-08-27 14:36:58,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 14:36:58,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 14:36:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:58,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 14:36:58,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 14:36:58,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 14:36:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 14:36:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 14:36:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923213524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:59,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 14:36:59,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-27 14:36:59,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125887494] [2021-08-27 14:36:59,064 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 14:36:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 7 times [2021-08-27 14:36:59,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:59,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542606637] [2021-08-27 14:36:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:59,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:59,067 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:59,069 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:59,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:59,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 14:36:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-27 14:36:59,083 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. cyclomatic complexity: 4 Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:59,134 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-08-27 14:36:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 14:36:59,134 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 23 transitions. [2021-08-27 14:36:59,135 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:59,135 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 22 transitions. [2021-08-27 14:36:59,135 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2021-08-27 14:36:59,135 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-08-27 14:36:59,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 22 transitions. [2021-08-27 14:36:59,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 14:36:59,136 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-27 14:36:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 22 transitions. [2021-08-27 14:36:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-08-27 14:36:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-27 14:36:59,137 INFO L704 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-27 14:36:59,137 INFO L587 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-27 14:36:59,137 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-08-27 14:36:59,137 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2021-08-27 14:36:59,137 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-27 14:36:59,137 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:36:59,138 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:36:59,138 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 4, 2, 1, 1, 1, 1, 1] [2021-08-27 14:36:59,138 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-27 14:36:59,138 INFO L791 eck$LassoCheckResult]: Stem: 692#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(8);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 693#L-1 havoc main_#res;havoc main_#t~ret7, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 698#L14 assume !(gcd_test_~a < 0); 699#L14-2 assume !(gcd_test_~b < 0); 694#L15-1 assume !(0 == gcd_test_~a); 695#L22-2 assume !!(0 != gcd_test_~b); 706#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 705#L22-2 assume !!(0 != gcd_test_~b); 704#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 703#L22-2 assume !!(0 != gcd_test_~b); 702#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 700#L22-2 assume !!(0 != gcd_test_~b); 701#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 697#L22-2 assume !!(0 != gcd_test_~b); 690#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 691#L22-2 assume !!(0 != gcd_test_~b); 688#L22 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 689#L22-2 [2021-08-27 14:36:59,138 INFO L793 eck$LassoCheckResult]: Loop: 689#L22-2 assume !!(0 != gcd_test_~b); 696#L22 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 689#L22-2 [2021-08-27 14:36:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1437871456, now seen corresponding path program 5 times [2021-08-27 14:36:59,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:59,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448549860] [2021-08-27 14:36:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:59,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 14:36:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:59,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 14:36:59,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448549860] [2021-08-27 14:36:59,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448549860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:59,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907503678] [2021-08-27 14:36:59,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 14:36:59,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 14:36:59,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:36:59,231 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 14:36:59,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 14:36:59,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-27 14:36:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 14:36:59,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 14:36:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 14:36:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 14:36:59,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907503678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 14:36:59,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 14:36:59,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-27 14:36:59,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671823136] [2021-08-27 14:36:59,516 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 14:36:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:36:59,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1862, now seen corresponding path program 8 times [2021-08-27 14:36:59,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:36:59,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203037167] [2021-08-27 14:36:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:36:59,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:36:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:59,519 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:36:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:36:59,520 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:36:59,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 14:36:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 14:36:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-08-27 14:36:59,539 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 4 Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 14:36:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 14:36:59,662 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2021-08-27 14:36:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 14:36:59,662 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 15 transitions. [2021-08-27 14:36:59,663 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:36:59,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 0 states and 0 transitions. [2021-08-27 14:36:59,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 14:36:59,663 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 14:36:59,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 14:36:59,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 14:36:59,663 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:36:59,663 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:36:59,663 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 14:36:59,663 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-08-27 14:36:59,664 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 14:36:59,664 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 14:36:59,664 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 14:36:59,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:36:59 BoogieIcfgContainer [2021-08-27 14:36:59,668 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:36:59,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:36:59,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:36:59,668 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:36:59,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:36:55" (3/4) ... [2021-08-27 14:36:59,670 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 14:36:59,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:36:59,671 INFO L168 Benchmark]: Toolchain (without parser) took 5061.54 ms. Allocated memory was 73.4 MB in the beginning and 148.9 MB in the end (delta: 75.5 MB). Free memory was 40.5 MB in the beginning and 87.4 MB in the end (delta: -46.9 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2021-08-27 14:36:59,671 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 73.4 MB. Free memory is still 56.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:36:59,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.51 ms. Allocated memory is still 73.4 MB. Free memory was 40.3 MB in the beginning and 49.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2021-08-27 14:36:59,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.22 ms. Allocated memory is still 73.4 MB. Free memory was 49.8 MB in the beginning and 57.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:36:59,672 INFO L168 Benchmark]: Boogie Preprocessor took 31.21 ms. Allocated memory is still 73.4 MB. Free memory was 57.9 MB in the beginning and 56.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:36:59,672 INFO L168 Benchmark]: RCFGBuilder took 239.11 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 43.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 14:36:59,672 INFO L168 Benchmark]: BuchiAutomizer took 4529.80 ms. Allocated memory was 73.4 MB in the beginning and 148.9 MB in the end (delta: 75.5 MB). Free memory was 43.3 MB in the beginning and 87.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-08-27 14:36:59,673 INFO L168 Benchmark]: Witness Printer took 2.27 ms. Allocated memory is still 148.9 MB. Free memory is still 87.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:36:59,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 73.4 MB. Free memory is still 56.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 196.51 ms. Allocated memory is still 73.4 MB. Free memory was 40.3 MB in the beginning and 49.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.22 ms. Allocated memory is still 73.4 MB. Free memory was 49.8 MB in the beginning and 57.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.21 ms. Allocated memory is still 73.4 MB. Free memory was 57.9 MB in the beginning and 56.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 239.11 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 43.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4529.80 ms. Allocated memory was 73.4 MB in the beginning and 148.9 MB in the end (delta: 75.5 MB). Free memory was 43.3 MB in the beginning and 87.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.27 ms. Allocated memory is still 148.9 MB. Free memory is still 87.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (7 trivial, 0 deterministic, 1 nondeterministic). One nondeterministic module has affine ranking function b and consists of 7 locations. 7 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.5s and 9 iterations. TraceHistogramMax:6. Analysis of lassos took 3.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 5. Minimization of nondet autom 3. Automata minimization 15.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 19 states and ocurred in iteration 7. Nontrivial modules had stage [0, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 56 SDtfs, 93 SDslu, 47 SDs, 0 SdLazy, 293 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 178.5ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc3 concLT0 SILN4 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital141 mio100 ax100 hnf98 lsp66 ukn47 mio100 lsp81 div100 bol100 ite100 ukn100 eq205 hnf90 smp100 dnf122 smp100 tf100 neg97 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 164ms VariablesStem: 6 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 14:36:59,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 14:36:59,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 14:37:00,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-27 14:37:00,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 14:37:00,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 14:37:00,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...