./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 8d31f386 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-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 75dd2ce3f6219a56f38a72471186bda1e7610d5c ............................................................................................................................................................................................................................................................................................................................................................ 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-wip.dd.multireach-323-8d31f38 [2021-07-06 18:16:49,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 18:16:49,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 18:16:49,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 18:16:49,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 18:16:49,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 18:16:49,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 18:16:49,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 18:16:49,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 18:16:49,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 18:16:49,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 18:16:49,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 18:16:49,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 18:16:49,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 18:16:49,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 18:16:49,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 18:16:49,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 18:16:49,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 18:16:49,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 18:16:49,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 18:16:49,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 18:16:49,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 18:16:49,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 18:16:49,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 18:16:49,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 18:16:49,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 18:16:49,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 18:16:49,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 18:16:49,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 18:16:49,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 18:16:49,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 18:16:49,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 18:16:49,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 18:16:49,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 18:16:49,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 18:16:49,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 18:16:49,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 18:16:49,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 18:16:49,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 18:16:49,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 18:16:49,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 18:16:49,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-07-06 18:16:49,874 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 18:16:49,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 18:16:49,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 18:16:49,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 18:16:49,877 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 18:16:49,877 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-07-06 18:16:49,877 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-07-06 18:16:49,878 INFO L138 SettingsManager]: * Use old map elimination=false [2021-07-06 18:16:49,878 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-07-06 18:16:49,878 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-07-06 18:16:49,879 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-07-06 18:16:49,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 18:16:49,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 18:16:49,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 18:16:49,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 18:16:49,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-07-06 18:16:49,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-07-06 18:16:49,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-07-06 18:16:49,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-06 18:16:49,881 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-07-06 18:16:49,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 18:16:49,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-07-06 18:16:49,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 18:16:49,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 18:16:49,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 18:16:49,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 18:16:49,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 18:16:49,884 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-07-06 18:16:49,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75dd2ce3f6219a56f38a72471186bda1e7610d5c [2021-07-06 18:16:50,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 18:16:50,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 18:16:50,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 18:16:50,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 18:16:50,240 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 18:16:50,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2021-07-06 18:16:50,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de6f0f1/36f6a342895d4eb4bb26db8139275c8d/FLAGfd6338753 [2021-07-06 18:16:50,705 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 18:16:50,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2021-07-06 18:16:50,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de6f0f1/36f6a342895d4eb4bb26db8139275c8d/FLAGfd6338753 [2021-07-06 18:16:51,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de6f0f1/36f6a342895d4eb4bb26db8139275c8d [2021-07-06 18:16:51,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 18:16:51,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-06 18:16:51,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 18:16:51,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 18:16:51,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 18:16:51,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78410662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51, skipping insertion in model container [2021-07-06 18:16:51,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 18:16:51,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 18:16:51,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 18:16:51,284 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 18:16:51,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 18:16:51,308 INFO L208 MainTranslator]: Completed translation [2021-07-06 18:16:51,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51 WrapperNode [2021-07-06 18:16:51,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 18:16:51,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-06 18:16:51,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-06 18:16:51,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-06 18:16:51,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-06 18:16:51,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 18:16:51,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 18:16:51,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 18:16:51,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 18:16:51,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 18:16:51,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 18:16:51,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 18:16:51,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (1/1) ... [2021-07-06 18:16:51,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-07-06 18:16:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 18:16:51,410 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) [2021-07-06 18:16:51,425 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 [2021-07-06 18:16:51,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 18:16:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 18:16:51,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 18:16:51,595 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-07-06 18:16:51,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 06:16:51 BoogieIcfgContainer [2021-07-06 18:16:51,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 18:16:51,599 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-07-06 18:16:51,599 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-07-06 18:16:51,601 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-07-06 18:16:51,602 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-07-06 18:16:51,602 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 06.07 06:16:51" (1/3) ... [2021-07-06 18:16:51,603 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@21a087fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.07 06:16:51, skipping insertion in model container [2021-07-06 18:16:51,604 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-07-06 18:16:51,604 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 06:16:51" (2/3) ... [2021-07-06 18:16:51,605 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@21a087fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.07 06:16:51, skipping insertion in model container [2021-07-06 18:16:51,605 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-07-06 18:16:51,605 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 06:16:51" (3/3) ... [2021-07-06 18:16:51,607 INFO L389 chiAutomizerObserver]: Analyzing ICFG ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2021-07-06 18:16:51,656 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-07-06 18:16:51,657 INFO L360 BuchiCegarLoop]: Hoare is false [2021-07-06 18:16:51,657 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-07-06 18:16:51,657 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-06 18:16:51,657 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-06 18:16:51,657 INFO L364 BuchiCegarLoop]: Difference is false [2021-07-06 18:16:51,658 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-06 18:16:51,658 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-07-06 18:16:51,668 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-07-06 18:16:51,680 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-07-06 18:16:51,680 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-07-06 18:16:51,681 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-07-06 18:16:51,685 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-07-06 18:16:51,685 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-07-06 18:16:51,685 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-07-06 18:16:51,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-07-06 18:16:51,686 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-07-06 18:16:51,686 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-07-06 18:16:51,686 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-07-06 18:16:51,687 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-07-06 18:16:51,687 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-07-06 18:16:51,693 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L18true assume !(main_~k~0 >= 0);main_~i~0 := -1; 6#L23-1true [2021-07-06 18:16:51,693 INFO L793 eck$LassoCheckResult]: Loop: 6#L23-1true assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 6#L23-1true [2021-07-06 18:16:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 18:16:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 998, now seen corresponding path program 1 times [2021-07-06 18:16:51,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 18:16:51,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153801773] [2021-07-06 18:16:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 18:16:51,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 18:16:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:51,780 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:51,792 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:51,807 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 18:16:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 18:16:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 1 times [2021-07-06 18:16:51,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 18:16:51,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753008881] [2021-07-06 18:16:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 18:16:51,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 18:16:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:51,823 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:51,835 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:51,838 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 18:16:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 18:16:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash 30953, now seen corresponding path program 1 times [2021-07-06 18:16:51,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 18:16:51,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489471925] [2021-07-06 18:16:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 18:16:51,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 18:16:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 18:16:51,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 18:16:51,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 18:16:51,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 18:16:51,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 18:16:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 18:16:51,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 18:16:51,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489471925] [2021-07-06 18:16:51,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489471925] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 18:16:51,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 18:16:51,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-06 18:16:51,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014922581] [2021-07-06 18:16:51,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 18:16:51,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 18:16:52,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 18:16:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 18:16:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 18:16:52,013 INFO L87 Difference]: Start difference. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-07-06 18:16:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 18:16:52,030 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2021-07-06 18:16:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 18:16:52,032 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-07-06 18:16:52,033 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-07-06 18:16:52,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 3 states and 3 transitions. [2021-07-06 18:16:52,036 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2021-07-06 18:16:52,036 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2021-07-06 18:16:52,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3 transitions. [2021-07-06 18:16:52,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-07-06 18:16:52,037 INFO L681 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2021-07-06 18:16:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3 states and 3 transitions. [2021-07-06 18:16:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3 to 3. [2021-07-06 18:16:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-07-06 18:16:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3 transitions. [2021-07-06 18:16:52,056 INFO L704 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2021-07-06 18:16:52,056 INFO L587 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2021-07-06 18:16:52,056 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-07-06 18:16:52,056 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3 states and 3 transitions. [2021-07-06 18:16:52,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-07-06 18:16:52,057 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-07-06 18:16:52,057 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-07-06 18:16:52,057 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-07-06 18:16:52,058 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-07-06 18:16:52,058 INFO L791 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L18 assume main_~k~0 >= 0; 28#L23-1 [2021-07-06 18:16:52,058 INFO L793 eck$LassoCheckResult]: Loop: 28#L23-1 assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 28#L23-1 [2021-07-06 18:16:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 18:16:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2021-07-06 18:16:52,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 18:16:52,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201118556] [2021-07-06 18:16:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 18:16:52,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 18:16:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:52,063 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:52,065 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:52,065 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 18:16:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 18:16:52,066 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 2 times [2021-07-06 18:16:52,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 18:16:52,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689425941] [2021-07-06 18:16:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 18:16:52,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 18:16:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:52,070 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:52,071 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:52,072 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 18:16:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 18:16:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 30891, now seen corresponding path program 1 times [2021-07-06 18:16:52,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 18:16:52,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993554781] [2021-07-06 18:16:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 18:16:52,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 18:16:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:52,086 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 18:16:52,089 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 18:16:52,090 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 18:16:52,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 18:16:52,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 18:16:52,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 18:16:52,162 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 18:16:52,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 06.07 06:16:52 BoogieIcfgContainer [2021-07-06 18:16:52,183 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-07-06 18:16:52,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 18:16:52,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 18:16:52,184 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 18:16:52,185 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 06:16:51" (3/4) ... [2021-07-06 18:16:52,187 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-07-06 18:16:52,217 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 18:16:52,218 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 18:16:52,219 INFO L168 Benchmark]: Toolchain (without parser) took 1070.42 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.7 MB in the beginning and 38.0 MB in the end (delta: -10.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 18:16:52,219 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 18:16:52,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.01 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 34.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-06 18:16:52,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.73 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 34.3 MB in the beginning and 45.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2021-07-06 18:16:52,225 INFO L168 Benchmark]: Boogie Preprocessor took 28.13 ms. Allocated memory is still 60.8 MB. Free memory was 45.8 MB in the beginning and 45.1 MB in the end (delta: 690.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 18:16:52,225 INFO L168 Benchmark]: RCFGBuilder took 215.44 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 36.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-07-06 18:16:52,226 INFO L168 Benchmark]: BuchiAutomizer took 584.80 ms. Allocated memory is still 60.8 MB. Free memory was 36.5 MB in the beginning and 39.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-07-06 18:16:52,226 INFO L168 Benchmark]: Witness Printer took 33.85 ms. Allocated memory is still 60.8 MB. Free memory was 39.6 MB in the beginning and 38.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 18:16:52,232 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 148.01 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 34.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.73 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 34.3 MB in the beginning and 45.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.13 ms. Allocated memory is still 60.8 MB. Free memory was 45.8 MB in the beginning and 45.1 MB in the end (delta: 690.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 215.44 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 36.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 584.80 ms. Allocated memory is still 60.8 MB. Free memory was 36.5 MB in the beginning and 39.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Witness Printer took 33.85 ms. Allocated memory is still 60.8 MB. Free memory was 39.6 MB in the beginning and 38.0 MB in the end (delta: 1.6 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 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 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.5s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.4s. 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 8.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 3 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.8ms Time 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 {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5e346699=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@251a9ef8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@35ceca80=0, i=0, k=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! [2021-07-06 18:16:52,273 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...