./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/memsafety-ext/tree_dsw.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version ff03de63 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/memsafety-ext/tree_dsw.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 22:50:28,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 22:50:28,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 22:50:28,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 22:50:28,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 22:50:28,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 22:50:28,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 22:50:28,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 22:50:28,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 22:50:28,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 22:50:28,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 22:50:28,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 22:50:28,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 22:50:28,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 22:50:28,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 22:50:28,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 22:50:28,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 22:50:28,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 22:50:28,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 22:50:28,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 22:50:28,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 22:50:28,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 22:50:28,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 22:50:28,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 22:50:28,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 22:50:28,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 22:50:28,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 22:50:28,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 22:50:28,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 22:50:28,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 22:50:28,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 22:50:28,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 22:50:28,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 22:50:28,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 22:50:28,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 22:50:28,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 22:50:28,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 22:50:28,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 22:50:28,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 22:50:28,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 22:50:28,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 22:50:28,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-21 22:50:28,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 22:50:28,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 22:50:28,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 22:50:28,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 22:50:28,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 22:50:28,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 22:50:28,135 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 22:50:28,135 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-21 22:50:28,136 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-21 22:50:28,136 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-21 22:50:28,136 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-21 22:50:28,136 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-21 22:50:28,137 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-21 22:50:28,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 22:50:28,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 22:50:28,137 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 22:50:28,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 22:50:28,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 22:50:28,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 22:50:28,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-21 22:50:28,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 22:50:28,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 22:50:28,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 22:50:28,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 22:50:28,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 22:50:28,140 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-21 22:50:28,140 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 [2021-12-21 22:50:28,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 22:50:28,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 22:50:28,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 22:50:28,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 22:50:28,369 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 22:50:28,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_dsw.i [2021-12-21 22:50:28,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c577cf7/731e3abbd2174c9d86f3ef561cdcb37d/FLAG00bb526d9 [2021-12-21 22:50:28,850 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 22:50:28,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_dsw.i [2021-12-21 22:50:28,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c577cf7/731e3abbd2174c9d86f3ef561cdcb37d/FLAG00bb526d9 [2021-12-21 22:50:28,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c577cf7/731e3abbd2174c9d86f3ef561cdcb37d [2021-12-21 22:50:28,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 22:50:28,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 22:50:28,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 22:50:28,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 22:50:28,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 22:50:28,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:50:28" (1/1) ... [2021-12-21 22:50:28,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3736a443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:28, skipping insertion in model container [2021-12-21 22:50:28,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:50:28" (1/1) ... [2021-12-21 22:50:28,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 22:50:28,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 22:50:29,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 22:50:29,197 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 22:50:29,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 22:50:29,252 INFO L208 MainTranslator]: Completed translation [2021-12-21 22:50:29,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29 WrapperNode [2021-12-21 22:50:29,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 22:50:29,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 22:50:29,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 22:50:29,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 22:50:29,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,306 INFO L137 Inliner]: procedures = 124, calls = 52, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 148 [2021-12-21 22:50:29,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 22:50:29,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 22:50:29,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 22:50:29,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 22:50:29,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 22:50:29,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 22:50:29,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 22:50:29,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 22:50:29,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (1/1) ... [2021-12-21 22:50:29,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-21 22:50:29,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 22:50:29,369 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) [2021-12-21 22:50:29,383 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 [2021-12-21 22:50:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 22:50:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 22:50:29,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 22:50:29,468 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 22:50:29,469 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 22:50:29,715 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 22:50:29,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 22:50:29,719 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 22:50:29,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:50:29 BoogieIcfgContainer [2021-12-21 22:50:29,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 22:50:29,721 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-21 22:50:29,721 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-21 22:50:29,733 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-21 22:50:29,734 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:50:29,734 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.12 10:50:28" (1/3) ... [2021-12-21 22:50:29,735 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a9573cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 10:50:29, skipping insertion in model container [2021-12-21 22:50:29,735 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:50:29,735 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:50:29" (2/3) ... [2021-12-21 22:50:29,735 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a9573cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.12 10:50:29, skipping insertion in model container [2021-12-21 22:50:29,735 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-21 22:50:29,736 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:50:29" (3/3) ... [2021-12-21 22:50:29,736 INFO L388 chiAutomizerObserver]: Analyzing ICFG tree_dsw.i [2021-12-21 22:50:29,778 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-21 22:50:29,778 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-21 22:50:29,778 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-21 22:50:29,778 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-21 22:50:29,778 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-21 22:50:29,778 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-21 22:50:29,778 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-21 22:50:29,778 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-21 22:50:29,790 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2021-12-21 22:50:29,803 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2021-12-21 22:50:29,804 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:50:29,804 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:50:29,808 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 22:50:29,808 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-21 22:50:29,809 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-21 22:50:29,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2021-12-21 22:50:29,812 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2021-12-21 22:50:29,813 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:50:29,813 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:50:29,813 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 22:50:29,813 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-21 22:50:29,818 INFO L791 eck$LassoCheckResult]: Stem: 15#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2); 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 21#L549-2true [2021-12-21 22:50:29,819 INFO L793 eck$LassoCheckResult]: Loop: 21#L549-2true assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 12#L539-2true assume !true; 18#L538-5true call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 7#L544true assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc13#1.base, main_#t~malloc13#1.offset;call main_#t~mem14#1.base, main_#t~mem14#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem14#1.base, main_#t~mem14#1.offset, 4);havoc main_#t~mem14#1.base, main_#t~mem14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset; 5#L544-2true call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 11#L549true assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 21#L549-2true [2021-12-21 22:50:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-21 22:50:29,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:29,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732508434] [2021-12-21 22:50:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:29,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:29,962 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,008 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2021-12-21 22:50:30,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861862703] [2021-12-21 22:50:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:50:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:50:30,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:50:30,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861862703] [2021-12-21 22:50:30,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861862703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:50:30,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:50:30,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 22:50:30,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990768907] [2021-12-21 22:50:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:50:30,094 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 22:50:30,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:50:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 22:50:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 22:50:30,120 INFO L87 Difference]: Start difference. First operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 22:50:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:50:30,127 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2021-12-21 22:50:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 22:50:30,132 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 36 transitions. [2021-12-21 22:50:30,134 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2021-12-21 22:50:30,136 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 21 states and 32 transitions. [2021-12-21 22:50:30,137 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-12-21 22:50:30,137 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-12-21 22:50:30,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 32 transitions. [2021-12-21 22:50:30,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 22:50:30,138 INFO L681 BuchiCegarLoop]: Abstraction has 21 states and 32 transitions. [2021-12-21 22:50:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 32 transitions. [2021-12-21 22:50:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-21 22:50:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 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) [2021-12-21 22:50:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2021-12-21 22:50:30,156 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 32 transitions. [2021-12-21 22:50:30,156 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 32 transitions. [2021-12-21 22:50:30,156 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-21 22:50:30,156 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 32 transitions. [2021-12-21 22:50:30,158 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2021-12-21 22:50:30,158 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:50:30,158 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:50:30,158 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 22:50:30,158 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:50:30,159 INFO L791 eck$LassoCheckResult]: Stem: 64#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2); 65#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 70#L549-2 [2021-12-21 22:50:30,159 INFO L793 eck$LassoCheckResult]: Loop: 70#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 63#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 71#L538-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 58#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 59#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 69#L544 assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc13#1.base, main_#t~malloc13#1.offset;call main_#t~mem14#1.base, main_#t~mem14#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem14#1.base, main_#t~mem14#1.offset, 4);havoc main_#t~mem14#1.base, main_#t~mem14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset; 66#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 67#L549 assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 70#L549-2 [2021-12-21 22:50:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-21 22:50:30,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083079032] [2021-12-21 22:50:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,192 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,207 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2021-12-21 22:50:30,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786548814] [2021-12-21 22:50:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:50:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:50:30,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:50:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786548814] [2021-12-21 22:50:30,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786548814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:50:30,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:50:30,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 22:50:30,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528538835] [2021-12-21 22:50:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:50:30,399 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-21 22:50:30,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:50:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 22:50:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 22:50:30,400 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. cyclomatic complexity: 14 Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-12-21 22:50:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:50:30,515 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2021-12-21 22:50:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 22:50:30,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 42 transitions. [2021-12-21 22:50:30,519 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-12-21 22:50:30,523 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 42 transitions. [2021-12-21 22:50:30,524 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2021-12-21 22:50:30,524 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2021-12-21 22:50:30,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 42 transitions. [2021-12-21 22:50:30,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 22:50:30,524 INFO L681 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2021-12-21 22:50:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 42 transitions. [2021-12-21 22:50:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-21 22:50:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 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) [2021-12-21 22:50:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 36 transitions. [2021-12-21 22:50:30,527 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 36 transitions. [2021-12-21 22:50:30,527 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 36 transitions. [2021-12-21 22:50:30,527 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-21 22:50:30,528 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 36 transitions. [2021-12-21 22:50:30,531 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 19 [2021-12-21 22:50:30,531 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:50:30,531 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:50:30,532 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 22:50:30,532 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:50:30,532 INFO L791 eck$LassoCheckResult]: Stem: 123#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2); 124#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 129#L549-2 [2021-12-21 22:50:30,532 INFO L793 eck$LassoCheckResult]: Loop: 129#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 122#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 130#L538-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 131#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 140#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 128#L544 assume !((main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1);havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1; 125#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 126#L549 assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 129#L549-2 [2021-12-21 22:50:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-12-21 22:50:30,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724269325] [2021-12-21 22:50:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,566 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2021-12-21 22:50:30,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018968874] [2021-12-21 22:50:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,586 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,609 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2021-12-21 22:50:30,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129932080] [2021-12-21 22:50:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 22:50:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 22:50:30,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 22:50:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129932080] [2021-12-21 22:50:30,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129932080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 22:50:30,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 22:50:30,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 22:50:30,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670552084] [2021-12-21 22:50:30,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 22:50:30,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 22:50:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 22:50:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 22:50:30,812 INFO L87 Difference]: Start difference. First operand 24 states and 36 transitions. cyclomatic complexity: 15 Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 22:50:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 22:50:30,951 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2021-12-21 22:50:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 22:50:30,952 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 58 transitions. [2021-12-21 22:50:30,953 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 27 [2021-12-21 22:50:30,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 40 states and 58 transitions. [2021-12-21 22:50:30,953 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2021-12-21 22:50:30,953 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2021-12-21 22:50:30,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 58 transitions. [2021-12-21 22:50:30,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 22:50:30,954 INFO L681 BuchiCegarLoop]: Abstraction has 40 states and 58 transitions. [2021-12-21 22:50:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states and 58 transitions. [2021-12-21 22:50:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-12-21 22:50:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 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) [2021-12-21 22:50:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-12-21 22:50:30,956 INFO L704 BuchiCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-12-21 22:50:30,956 INFO L587 BuchiCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-12-21 22:50:30,956 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-21 22:50:30,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 32 states and 46 transitions. [2021-12-21 22:50:30,956 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 27 [2021-12-21 22:50:30,956 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-21 22:50:30,956 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-21 22:50:30,957 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-21 22:50:30,957 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 22:50:30,957 INFO L791 eck$LassoCheckResult]: Stem: 201#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2); 202#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 208#L549-2 [2021-12-21 22:50:30,957 INFO L793 eck$LassoCheckResult]: Loop: 208#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 217#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 209#L538-1 assume !main_#t~short7#1; 210#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 226#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 224#L544 assume !((main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1);havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1; 203#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 204#L549 assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 208#L549-2 [2021-12-21 22:50:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-12-21 22:50:30,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247207519] [2021-12-21 22:50:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,974 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:30,987 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2021-12-21 22:50:30,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526985426] [2021-12-21 22:50:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:30,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:31,000 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:31,015 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 22:50:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2021-12-21 22:50:31,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 22:50:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378495596] [2021-12-21 22:50:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 22:50:31,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 22:50:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:31,036 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 22:50:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 22:50:31,058 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 22:50:31,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.12 10:50:31 BoogieIcfgContainer [2021-12-21 22:50:31,442 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-21 22:50:31,443 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 22:50:31,443 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 22:50:31,443 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 22:50:31,443 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:50:29" (3/4) ... [2021-12-21 22:50:31,445 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-21 22:50:31,465 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 22:50:31,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 22:50:31,466 INFO L158 Benchmark]: Toolchain (without parser) took 2579.05ms. Allocated memory was 138.4MB in the beginning and 199.2MB in the end (delta: 60.8MB). Free memory was 106.7MB in the beginning and 124.9MB in the end (delta: -18.2MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,467 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory is still 39.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 22:50:31,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.74ms. Allocated memory is still 138.4MB. Free memory was 106.4MB in the beginning and 105.5MB in the end (delta: 976.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.17ms. Allocated memory is still 138.4MB. Free memory was 105.5MB in the beginning and 103.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,468 INFO L158 Benchmark]: Boogie Preprocessor took 31.69ms. Allocated memory is still 138.4MB. Free memory was 103.3MB in the beginning and 101.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,468 INFO L158 Benchmark]: RCFGBuilder took 381.91ms. Allocated memory is still 138.4MB. Free memory was 101.3MB in the beginning and 79.1MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,469 INFO L158 Benchmark]: BuchiAutomizer took 1720.85ms. Allocated memory was 138.4MB in the beginning and 199.2MB in the end (delta: 60.8MB). Free memory was 79.1MB in the beginning and 126.8MB in the end (delta: -47.7MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,469 INFO L158 Benchmark]: Witness Printer took 23.16ms. Allocated memory is still 199.2MB. Free memory was 125.9MB in the beginning and 124.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 22:50:31,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory is still 39.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 365.74ms. Allocated memory is still 138.4MB. Free memory was 106.4MB in the beginning and 105.5MB in the end (delta: 976.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.17ms. Allocated memory is still 138.4MB. Free memory was 105.5MB in the beginning and 103.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.69ms. Allocated memory is still 138.4MB. Free memory was 103.3MB in the beginning and 101.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 381.91ms. Allocated memory is still 138.4MB. Free memory was 101.3MB in the beginning and 79.1MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * BuchiAutomizer took 1720.85ms. Allocated memory was 138.4MB in the beginning and 199.2MB in the end (delta: 60.8MB). Free memory was 79.1MB in the beginning and 126.8MB in the end (delta: -47.7MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. * Witness Printer took 23.16ms. Allocated memory is still 199.2MB. Free memory was 125.9MB in the beginning and 124.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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 3 terminating modules (3 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.3 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 32 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.6s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 32 states and ocurred in iteration 3. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 167 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 82 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 147 IncrementalHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 85 mSDtfsCounter, 147 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI2 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: 536]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@40e0e462=0, NULL=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6be3652a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5e389bf5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@10ef0ebf=0, pred=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@15651846=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7890f646=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@121e6b01=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7ce32adb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@15651846=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@deef1dd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@10ef0ebf=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@709f319f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@16036697=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3d57d339=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7088ee4f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5c72c177=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6889b5a=0, \result=0, sentinel=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@16036697=0, NULL=0, n=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7890f646=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7088ee4f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7dfd1a2e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@28608346=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ed71a38=0, succ=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@28608346=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4afde620=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3d57d339=0, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@16b1bb2f=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@62d8f9c9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@35da2fc4=0, sentinel=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5973bb78=0, pred=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@40e0e462=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7ce32adb=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5973bb78=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@121e6b01=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6be3652a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3301d661=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@619356ed=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5c72c177=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ed71a38=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@69bea5bf=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5e389bf5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4afde620=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6889b5a=0, succ=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@16b1bb2f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@619356ed=0, root=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1f158718=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@709f319f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@62d8f9c9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@42d71dcb=10, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@deef1dd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@187b3fa7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3301d661=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@69bea5bf=0, s=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 536]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] root->left = ((void *)0) [L535] root->right = ((void *)0) Loop: [L536] COND TRUE __VERIFIER_nondet_int() [L537] n = root [L538] EXPR n->left [L538] n->left && n->right [L538] COND FALSE !(n->left && n->right) [L544] EXPR n->left [L544] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L549] EXPR n->right [L549] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-12-21 22:50:31,538 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)