./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c --full-output -ea --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.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 c06467573d5b161d2e6fae8b3debbeebc37f400272e6a21d533eff435db2aec4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-21 03:24:48,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-21 03:24:48,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-21 03:24:48,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-21 03:24:48,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-21 03:24:48,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-21 03:24:48,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-21 03:24:48,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-21 03:24:48,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-21 03:24:48,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-21 03:24:48,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-21 03:24:48,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-21 03:24:48,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-21 03:24:48,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-21 03:24:48,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-21 03:24:48,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-21 03:24:48,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-21 03:24:48,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-21 03:24:48,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-21 03:24:48,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-21 03:24:48,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-21 03:24:48,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-21 03:24:48,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-21 03:24:48,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-21 03:24:48,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-21 03:24:48,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-21 03:24:48,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-21 03:24:48,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-21 03:24:48,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-21 03:24:48,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-21 03:24:48,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-21 03:24:48,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-21 03:24:48,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-21 03:24:48,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-21 03:24:48,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-21 03:24:48,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-21 03:24:48,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-21 03:24:48,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-21 03:24:48,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-21 03:24:48,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-21 03:24:48,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-21 03:24:48,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-02-21 03:24:48,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-21 03:24:48,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-21 03:24:48,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-21 03:24:48,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-21 03:24:48,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-21 03:24:48,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-21 03:24:48,947 INFO L138 SettingsManager]: * Use SBE=true [2022-02-21 03:24:48,947 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-02-21 03:24:48,947 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-02-21 03:24:48,947 INFO L138 SettingsManager]: * Use old map elimination=false [2022-02-21 03:24:48,948 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-02-21 03:24:48,948 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-02-21 03:24:48,948 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-02-21 03:24:48,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-21 03:24:48,948 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-21 03:24:48,949 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-02-21 03:24:48,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-21 03:24:48,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-02-21 03:24:48,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-21 03:24:48,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-21 03:24:48,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-21 03:24:48,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-21 03:24:48,951 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-21 03:24:48,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c06467573d5b161d2e6fae8b3debbeebc37f400272e6a21d533eff435db2aec4 [2022-02-21 03:24:49,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-21 03:24:49,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-21 03:24:49,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-21 03:24:49,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-21 03:24:49,170 INFO L275 PluginConnector]: CDTParser initialized [2022-02-21 03:24:49,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2022-02-21 03:24:49,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8d52659c/d27b4b0a4eee4f0e93a4345e7955ca8e/FLAG402482ac1 [2022-02-21 03:24:49,573 INFO L306 CDTParser]: Found 1 translation units. [2022-02-21 03:24:49,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2022-02-21 03:24:49,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8d52659c/d27b4b0a4eee4f0e93a4345e7955ca8e/FLAG402482ac1 [2022-02-21 03:24:49,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8d52659c/d27b4b0a4eee4f0e93a4345e7955ca8e [2022-02-21 03:24:49,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-21 03:24:49,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-21 03:24:49,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-21 03:24:49,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-21 03:24:49,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-21 03:24:49,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d461df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49, skipping insertion in model container [2022-02-21 03:24:49,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-21 03:24:49,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-21 03:24:49,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-21 03:24:49,780 INFO L203 MainTranslator]: Completed pre-run [2022-02-21 03:24:49,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-21 03:24:49,801 INFO L208 MainTranslator]: Completed translation [2022-02-21 03:24:49,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49 WrapperNode [2022-02-21 03:24:49,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-21 03:24:49,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-21 03:24:49,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-21 03:24:49,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-21 03:24:49,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,824 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-02-21 03:24:49,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-21 03:24:49,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-21 03:24:49,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-21 03:24:49,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-21 03:24:49,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-21 03:24:49,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-21 03:24:49,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-21 03:24:49,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-21 03:24:49,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (1/1) ... [2022-02-21 03:24:49,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-02-21 03:24:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-21 03:24:49,893 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) [2022-02-21 03:24:49,907 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 [2022-02-21 03:24:49,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-21 03:24:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-21 03:24:49,977 INFO L234 CfgBuilder]: Building ICFG [2022-02-21 03:24:49,978 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-21 03:24:50,052 INFO L275 CfgBuilder]: Performing block encoding [2022-02-21 03:24:50,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-21 03:24:50,057 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-21 03:24:50,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:24:50 BoogieIcfgContainer [2022-02-21 03:24:50,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-21 03:24:50,061 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-02-21 03:24:50,061 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-02-21 03:24:50,063 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-02-21 03:24:50,064 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-02-21 03:24:50,064 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.02 03:24:49" (1/3) ... [2022-02-21 03:24:50,065 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4ec5623a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.02 03:24:50, skipping insertion in model container [2022-02-21 03:24:50,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-02-21 03:24:50,065 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:24:49" (2/3) ... [2022-02-21 03:24:50,065 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4ec5623a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.02 03:24:50, skipping insertion in model container [2022-02-21 03:24:50,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-02-21 03:24:50,065 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:24:50" (3/3) ... [2022-02-21 03:24:50,066 INFO L388 chiAutomizerObserver]: Analyzing ICFG ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2022-02-21 03:24:50,115 INFO L359 BuchiCegarLoop]: Interprodecural is true [2022-02-21 03:24:50,115 INFO L360 BuchiCegarLoop]: Hoare is false [2022-02-21 03:24:50,115 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-02-21 03:24:50,116 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-02-21 03:24:50,116 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-02-21 03:24:50,116 INFO L364 BuchiCegarLoop]: Difference is false [2022-02-21 03:24:50,116 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-02-21 03:24:50,116 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2022-02-21 03:24:50,128 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-02-21 03:24:50,141 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-02-21 03:24:50,141 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-02-21 03:24:50,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-02-21 03:24:50,144 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-02-21 03:24:50,144 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2022-02-21 03:24:50,145 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2022-02-21 03:24:50,145 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-02-21 03:24:50,147 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-02-21 03:24:50,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-02-21 03:24:50,148 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-02-21 03:24:50,148 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-02-21 03:24:50,148 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2022-02-21 03:24:50,152 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~k~0#1, main_~i~0#1;havoc main_~k~0#1;havoc main_~i~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 4#L18true assume !(main_~k~0#1 >= 0);main_~i~0#1 := -1; 9#L23-1true [2022-02-21 03:24:50,152 INFO L793 eck$LassoCheckResult]: Loop: 9#L23-1true assume !!(main_~i~0#1 >= 0);main_~i~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 9#L23-1true [2022-02-21 03:24:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-21 03:24:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2022-02-21 03:24:50,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-21 03:24:50,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821818432] [2022-02-21 03:24:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-21 03:24:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-21 03:24:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,223 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-21 03:24:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,245 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-21 03:24:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-21 03:24:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 47, now seen corresponding path program 1 times [2022-02-21 03:24:50,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-21 03:24:50,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841131786] [2022-02-21 03:24:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-21 03:24:50,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-21 03:24:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,259 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-21 03:24:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,270 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-21 03:24:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-21 03:24:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash 925676, now seen corresponding path program 1 times [2022-02-21 03:24:50,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-21 03:24:50,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833178646] [2022-02-21 03:24:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-21 03:24:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-21 03:24:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-21 03:24:50,357 INFO L290 TraceCheckUtils]: 0: Hoare triple {16#true} assume { :begin_inline_ULTIMATE.init } true; {16#true} is VALID [2022-02-21 03:24:50,358 INFO L290 TraceCheckUtils]: 1: Hoare triple {16#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~k~0#1, main_~i~0#1;havoc main_~k~0#1;havoc main_~i~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; {16#true} is VALID [2022-02-21 03:24:50,359 INFO L290 TraceCheckUtils]: 2: Hoare triple {16#true} assume !(main_~k~0#1 >= 0);main_~i~0#1 := -1; {18#(<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0)} is VALID [2022-02-21 03:24:50,360 INFO L290 TraceCheckUtils]: 3: Hoare triple {18#(<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0)} assume !!(main_~i~0#1 >= 0);main_~i~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; {17#false} is VALID [2022-02-21 03:24:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-21 03:24:50,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-21 03:24:50,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833178646] [2022-02-21 03:24:50,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833178646] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-21 03:24:50,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-21 03:24:50,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-21 03:24:50,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341147647] [2022-02-21 03:24:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-21 03:24:50,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-21 03:24:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-21 03:24:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-21 03:24:50,409 INFO L87 Difference]: Start difference. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-21 03:24:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-21 03:24:50,440 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2022-02-21 03:24:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-21 03:24:50,441 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-21 03:24:50,446 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-21 03:24:50,449 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2022-02-21 03:24:50,451 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-02-21 03:24:50,453 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 4 states and 4 transitions. [2022-02-21 03:24:50,454 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2022-02-21 03:24:50,454 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2022-02-21 03:24:50,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 4 transitions. [2022-02-21 03:24:50,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-02-21 03:24:50,454 INFO L681 BuchiCegarLoop]: Abstraction has 4 states and 4 transitions. [2022-02-21 03:24:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states and 4 transitions. [2022-02-21 03:24:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2022-02-21 03:24:50,469 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-21 03:24:50,470 INFO L82 GeneralOperation]: Start isEquivalent. First operand 4 states and 4 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-21 03:24:50,470 INFO L74 IsIncluded]: Start isIncluded. First operand 4 states and 4 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-21 03:24:50,471 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-21 03:24:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-21 03:24:50,472 INFO L93 Difference]: Finished difference Result 4 states and 4 transitions. [2022-02-21 03:24:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2022-02-21 03:24:50,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-21 03:24:50,473 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-21 03:24:50,473 INFO L74 IsIncluded]: Start isIncluded. First operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 states and 4 transitions. [2022-02-21 03:24:50,473 INFO L87 Difference]: Start difference. First operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 states and 4 transitions. [2022-02-21 03:24:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-21 03:24:50,474 INFO L93 Difference]: Finished difference Result 4 states and 4 transitions. [2022-02-21 03:24:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2022-02-21 03:24:50,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-21 03:24:50,474 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-21 03:24:50,475 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-21 03:24:50,475 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-21 03:24:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-21 03:24:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2022-02-21 03:24:50,476 INFO L704 BuchiCegarLoop]: Abstraction has 4 states and 4 transitions. [2022-02-21 03:24:50,477 INFO L587 BuchiCegarLoop]: Abstraction has 4 states and 4 transitions. [2022-02-21 03:24:50,477 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2022-02-21 03:24:50,477 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 4 states and 4 transitions. [2022-02-21 03:24:50,477 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2022-02-21 03:24:50,477 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-02-21 03:24:50,477 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-02-21 03:24:50,478 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-02-21 03:24:50,478 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2022-02-21 03:24:50,478 INFO L791 eck$LassoCheckResult]: Stem: 30#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 31#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_~k~0#1, main_~i~0#1;havoc main_~k~0#1;havoc main_~i~0#1;main_~k~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~i~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 28#L18 assume main_~k~0#1 >= 0; 29#L23-1 [2022-02-21 03:24:50,478 INFO L793 eck$LassoCheckResult]: Loop: 29#L23-1 assume !!(main_~i~0#1 >= 0);main_~i~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 29#L23-1 [2022-02-21 03:24:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-21 03:24:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-02-21 03:24:50,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-21 03:24:50,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688938638] [2022-02-21 03:24:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-21 03:24:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-21 03:24:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,484 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-21 03:24:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,486 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-21 03:24:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-21 03:24:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash 47, now seen corresponding path program 2 times [2022-02-21 03:24:50,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-21 03:24:50,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263435529] [2022-02-21 03:24:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-21 03:24:50,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-21 03:24:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,490 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-21 03:24:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,492 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-21 03:24:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-21 03:24:50,493 INFO L85 PathProgramCache]: Analyzing trace with hash 925614, now seen corresponding path program 1 times [2022-02-21 03:24:50,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-21 03:24:50,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080815779] [2022-02-21 03:24:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-21 03:24:50,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-21 03:24:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,497 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-21 03:24:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-21 03:24:50,500 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-21 03:24:50,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.02 03:24:50 BoogieIcfgContainer [2022-02-21 03:24:50,568 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-02-21 03:24:50,568 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-02-21 03:24:50,568 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-02-21 03:24:50,568 INFO L275 PluginConnector]: Witness Printer initialized [2022-02-21 03:24:50,569 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:24:50" (3/4) ... [2022-02-21 03:24:50,570 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-02-21 03:24:50,595 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-02-21 03:24:50,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-02-21 03:24:50,596 INFO L158 Benchmark]: Toolchain (without parser) took 997.06ms. Allocated memory was 132.1MB in the beginning and 203.4MB in the end (delta: 71.3MB). Free memory was 102.6MB in the beginning and 178.9MB in the end (delta: -76.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-21 03:24:50,596 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-02-21 03:24:50,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.04ms. Allocated memory is still 132.1MB. Free memory was 102.6MB in the beginning and 106.5MB in the end (delta: -4.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-21 03:24:50,597 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.94ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 105.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-21 03:24:50,597 INFO L158 Benchmark]: Boogie Preprocessor took 12.91ms. Allocated memory is still 132.1MB. Free memory was 105.3MB in the beginning and 104.4MB in the end (delta: 894.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-02-21 03:24:50,598 INFO L158 Benchmark]: RCFGBuilder took 219.36ms. Allocated memory is still 132.1MB. Free memory was 104.4MB in the beginning and 96.1MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-21 03:24:50,598 INFO L158 Benchmark]: BuchiAutomizer took 506.83ms. Allocated memory is still 132.1MB. Free memory was 95.7MB in the beginning and 106.3MB in the end (delta: -10.6MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. [2022-02-21 03:24:50,599 INFO L158 Benchmark]: Witness Printer took 27.00ms. Allocated memory was 132.1MB in the beginning and 203.4MB in the end (delta: 71.3MB). Free memory was 106.2MB in the beginning and 178.9MB in the end (delta: -72.7MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. [2022-02-21 03:24:50,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.04ms. Allocated memory is still 132.1MB. Free memory was 102.6MB in the beginning and 106.5MB in the end (delta: -4.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.94ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 105.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.91ms. Allocated memory is still 132.1MB. Free memory was 105.3MB in the beginning and 104.4MB in the end (delta: 894.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 219.36ms. Allocated memory is still 132.1MB. Free memory was 104.4MB in the beginning and 96.1MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 506.83ms. Allocated memory is still 132.1MB. Free memory was 95.7MB in the beginning and 106.3MB in the end (delta: -10.6MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. * Witness Printer took 27.00ms. Allocated memory was 132.1MB in the beginning and 203.4MB in the end (delta: 71.3MB). Free memory was 106.2MB in the beginning and 178.9MB in the end (delta: -72.7MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 2 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 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 4 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 9 mSDtfsCounter, 4 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 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: 23]: 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 {i=0, k=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@429086c2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@78798285=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4682550a=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int k, i; [L16] k = __VERIFIER_nondet_int() [L17] i = __VERIFIER_nondet_int() [L18] COND TRUE k >= 0 Loop: [L23] COND TRUE i >= 0 [L24] i = __VERIFIER_nondet_int() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-02-21 03:24:50,639 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)