./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/GCD-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/termination-restricted-15/GCD-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3a668603f73a848e02f189ca3bd9be8e08411aae ......................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 14:10:15,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 14:10:15,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 14:10:15,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 14:10:15,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 14:10:15,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 14:10:15,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 14:10:15,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 14:10:15,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 14:10:15,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 14:10:15,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 14:10:15,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 14:10:15,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 14:10:15,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 14:10:15,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 14:10:15,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 14:10:15,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 14:10:15,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 14:10:15,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 14:10:15,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 14:10:15,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 14:10:15,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 14:10:15,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 14:10:15,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 14:10:15,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 14:10:15,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 14:10:15,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 14:10:15,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 14:10:15,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 14:10:15,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 14:10:15,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 14:10:15,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 14:10:15,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 14:10:15,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 14:10:15,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 14:10:15,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 14:10:15,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 14:10:15,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 14:10:15,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 14:10:15,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 14:10:15,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 14:10:15,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 14:10:15,882 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 14:10:15,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 14:10:15,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 14:10:15,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 14:10:15,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 14:10:15,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 14:10:15,886 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 14:10:15,886 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 14:10:15,886 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 14:10:15,886 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 14:10:15,887 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 14:10:15,887 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 14:10:15,887 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 14:10:15,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 14:10:15,887 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 14:10:15,888 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 14:10:15,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 14:10:15,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 14:10:15,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 14:10:15,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 14:10:15,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 14:10:15,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 14:10:15,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 14:10:15,890 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 14:10:15,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a668603f73a848e02f189ca3bd9be8e08411aae [2021-08-27 14:10:16,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 14:10:16,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 14:10:16,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 14:10:16,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 14:10:16,200 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 14:10:16,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD-1.c [2021-08-27 14:10:16,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914681890/99e784df84ef44f08cbe4a1f2ddc30f0/FLAGf223ffa53 [2021-08-27 14:10:16,622 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 14:10:16,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD-1.c [2021-08-27 14:10:16,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914681890/99e784df84ef44f08cbe4a1f2ddc30f0/FLAGf223ffa53 [2021-08-27 14:10:16,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914681890/99e784df84ef44f08cbe4a1f2ddc30f0 [2021-08-27 14:10:16,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 14:10:16,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 14:10:16,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 14:10:16,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 14:10:16,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 14:10:16,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b061244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16, skipping insertion in model container [2021-08-27 14:10:16,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 14:10:16,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 14:10:16,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:10:16,800 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 14:10:16,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 14:10:16,822 INFO L208 MainTranslator]: Completed translation [2021-08-27 14:10:16,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16 WrapperNode [2021-08-27 14:10:16,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 14:10:16,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 14:10:16,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 14:10:16,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 14:10:16,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 14:10:16,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 14:10:16,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 14:10:16,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 14:10:16,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 14:10:16,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 14:10:16,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 14:10:16,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 14:10:16,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (1/1) ... [2021-08-27 14:10:16,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 14:10:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 14:10:16,938 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 14:10:16,963 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 14:10:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 14:10:16,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 14:10:17,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 14:10:17,116 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-27 14:10:17,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:10:17 BoogieIcfgContainer [2021-08-27 14:10:17,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 14:10:17,119 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 14:10:17,119 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 14:10:17,121 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 14:10:17,121 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:10:17,122 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 02:10:16" (1/3) ... [2021-08-27 14:10:17,122 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@46254f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:10:17, skipping insertion in model container [2021-08-27 14:10:17,123 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:10:17,123 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:10:16" (2/3) ... [2021-08-27 14:10:17,123 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@46254f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 02:10:17, skipping insertion in model container [2021-08-27 14:10:17,123 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 14:10:17,123 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:10:17" (3/3) ... [2021-08-27 14:10:17,124 INFO L389 chiAutomizerObserver]: Analyzing ICFG GCD-1.c [2021-08-27 14:10:17,156 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 14:10:17,156 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 14:10:17,156 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 14:10:17,156 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 14:10:17,156 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 14:10:17,157 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 14:10:17,157 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 14:10:17,157 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 14:10:17,167 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 14:10:17,178 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:10:17,179 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:17,179 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:17,183 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:10:17,183 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:17,183 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 14:10:17,184 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 14:10:17,185 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 14:10:17,185 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 14:10:17,185 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 14:10:17,185 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 14:10:17,185 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 14:10:17,200 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 7#L13-2true [2021-08-27 14:10:17,200 INFO L793 eck$LassoCheckResult]: Loop: 7#L13-2true assume !!(0 != main_~y~0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 4#L17true assume main_~x~0 <= 0 || main_~y~0 <= 0;main_~y~0 := 0; 10#L23-3true main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 7#L13-2true [2021-08-27 14:10:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 14:10:17,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:17,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146893614] [2021-08-27 14:10:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:17,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:17,270 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:17,290 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 39837, now seen corresponding path program 1 times [2021-08-27 14:10:17,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:17,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196430324] [2021-08-27 14:10:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:17,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:17,315 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:17,331 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 14:10:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 963358, now seen corresponding path program 1 times [2021-08-27 14:10:17,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 14:10:17,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742770392] [2021-08-27 14:10:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 14:10:17,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 14:10:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:17,349 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 14:10:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 14:10:17,359 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 14:10:17,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 02:10:17 BoogieIcfgContainer [2021-08-27 14:10:17,578 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 14:10:17,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 14:10:17,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 14:10:17,579 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 14:10:17,579 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:10:17" (3/4) ... [2021-08-27 14:10:17,581 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 14:10:17,616 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 14:10:17,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 14:10:17,618 INFO L168 Benchmark]: Toolchain (without parser) took 974.20 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.8 MB in the beginning and 51.5 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:10:17,618 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 40.9 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 14:10:17,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.98 ms. Allocated memory is still 58.7 MB. Free memory was 37.7 MB in the beginning and 29.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:17,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.22 ms. Allocated memory is still 58.7 MB. Free memory was 29.1 MB in the beginning and 43.4 MB in the end (delta: -14.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:17,620 INFO L168 Benchmark]: Boogie Preprocessor took 19.67 ms. Allocated memory is still 58.7 MB. Free memory was 43.4 MB in the beginning and 42.4 MB in the end (delta: 975.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:17,620 INFO L168 Benchmark]: RCFGBuilder took 242.66 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 32.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:17,621 INFO L168 Benchmark]: BuchiAutomizer took 459.61 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 53.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:17,621 INFO L168 Benchmark]: Witness Printer took 37.66 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 51.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 14:10:17,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 40.9 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 176.98 ms. Allocated memory is still 58.7 MB. Free memory was 37.7 MB in the beginning and 29.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.22 ms. Allocated memory is still 58.7 MB. Free memory was 29.1 MB in the beginning and 43.4 MB in the end (delta: -14.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.67 ms. Allocated memory is still 58.7 MB. Free memory was 43.4 MB in the beginning and 42.4 MB in the end (delta: 975.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 242.66 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 32.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 459.61 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 53.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. * Witness Printer took 37.66 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 51.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: No data available LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {xtmp=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@24cd4cb9=0, tmp=-1, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3388a2a0=0, x=-1, y=-1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE y != 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x <= 0 || y <= 0 [L18] y = 0 [L29] y = xtmp [L30] x = tmp End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-08-27 14:10:17,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...