./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer --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 356492c77ca30b45c8c64fdda8fe0cb19edee2c6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-28 03:11:26,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:11:26,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:11:26,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:11:26,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:11:26,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:11:26,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:11:26,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:11:26,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:11:26,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:11:26,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:11:26,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:11:26,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:11:26,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:11:26,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:11:26,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:11:26,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:11:26,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:11:26,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:11:26,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:11:26,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:11:26,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:11:26,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:11:26,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:11:26,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:11:26,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:11:26,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:11:26,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:11:26,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:11:26,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:11:26,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:11:26,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:11:26,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:11:26,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:11:26,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:11:26,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:11:26,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:11:26,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:11:26,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:11:26,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:11:26,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:11:26,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 03:11:26,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:11:26,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:11:26,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:11:26,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:11:26,932 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:11:26,933 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:11:26,933 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:11:26,933 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:11:26,933 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:11:26,934 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:11:26,934 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:11:26,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:11:26,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:11:26,935 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:11:26,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:11:26,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:11:26,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:11:26,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:11:26,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:11:26,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:11:26,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:11:26,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:11:26,937 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:11:26,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:11:26,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:11:26,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:11:26,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:11:26,938 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:11:26,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:11:26,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:11:26,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:11:26,939 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:11:26,940 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:11:26,940 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:/tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 356492c77ca30b45c8c64fdda8fe0cb19edee2c6 [2020-11-28 03:11:27,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:11:27,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:11:27,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:11:27,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:11:27,347 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:11:27,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2020-11-28 03:11:27,451 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/data/18813b05d/68601162f1d04582af01bf804c93db24/FLAG007a4708d [2020-11-28 03:11:28,128 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:11:28,132 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2020-11-28 03:11:28,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/data/18813b05d/68601162f1d04582af01bf804c93db24/FLAG007a4708d [2020-11-28 03:11:28,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/data/18813b05d/68601162f1d04582af01bf804c93db24 [2020-11-28 03:11:28,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:11:28,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:11:28,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:28,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:11:28,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:11:28,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f12e9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:28, skipping insertion in model container [2020-11-28 03:11:28,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:28" (1/1) ... [2020-11-28 03:11:28,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:11:28,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:11:28,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:28,841 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:11:28,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:29,019 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:11:29,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29 WrapperNode [2020-11-28 03:11:29,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:29,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:29,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:11:29,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:11:29,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:29,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:11:29,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:11:29,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:11:29,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... [2020-11-28 03:11:29,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:11:29,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:11:29,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:11:29,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:11:29,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:29,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:11:29,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:11:29,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:11:29,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 03:11:29,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:11:29,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 03:11:29,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:11:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:11:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:11:29,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:11:30,149 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:11:30,150 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-28 03:11:30,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:30 BoogieIcfgContainer [2020-11-28 03:11:30,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:11:30,158 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:11:30,158 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:11:30,162 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:11:30,163 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:11:30,163 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:11:28" (1/3) ... [2020-11-28 03:11:30,165 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@655fcab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:11:30, skipping insertion in model container [2020-11-28 03:11:30,166 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:11:30,166 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:29" (2/3) ... [2020-11-28 03:11:30,167 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@655fcab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:11:30, skipping insertion in model container [2020-11-28 03:11:30,167 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:11:30,167 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:30" (3/3) ... [2020-11-28 03:11:30,170 INFO L373 chiAutomizerObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-11-28 03:11:30,236 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:11:30,236 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:11:30,237 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:11:30,237 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:11:30,237 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:11:30,237 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:11:30,237 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:11:30,237 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:11:30,272 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 46 states. [2020-11-28 03:11:30,299 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-28 03:11:30,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:30,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:30,308 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:30,308 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:11:30,308 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:11:30,309 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 46 states. [2020-11-28 03:11:30,322 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-28 03:11:30,322 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:30,322 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:30,325 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:30,325 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:11:30,351 INFO L794 eck$LassoCheckResult]: Stem: 41#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(24); 14#L-1true havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~short25, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_#t~nondet31, main_#t~malloc35.base, main_#t~malloc35.offset, main_#t~mem36.base, main_#t~mem36.offset, main_#t~nondet34, main_#t~mem38.base, main_#t~mem38.offset, main_#t~mem37, main_#t~mem40.base, main_#t~mem40.offset, main_#t~mem39, main_#t~mem41, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~pred~0.base, main_~pred~0.offset, main_~a~0.base, main_~a~0.offset, main_~t~0.base, main_~t~0.offset, main_~p~0.base, main_~p~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 8#L568-2true [2020-11-28 03:11:30,352 INFO L796 eck$LassoCheckResult]: Loop: 8#L568-2true assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 32#L558-2true assume !true; 42#L557-5true call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 18#L563true assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc15.base, main_#t~malloc15.offset, main_~n~0.base, main_~n~0.offset, 4);call main_#t~mem16.base, main_#t~mem16.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem16.base, main_#t~mem16.offset, 4);havoc main_#t~mem16.base, main_#t~mem16.offset;call main_#t~mem17.base, main_#t~mem17.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset; 25#L563-2true call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 4#L568true assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 8#L568-2true [2020-11-28 03:11:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:30,364 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-28 03:11:30,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:30,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081723311] [2020-11-28 03:11:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:30,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:30,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:30,656 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2020-11-28 03:11:30,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:30,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490127600] [2020-11-28 03:11:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490127600] [2020-11-28 03:11:30,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:30,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:11:30,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523127317] [2020-11-28 03:11:30,741 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:11:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:11:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:11:30,765 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-11-28 03:11:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:30,780 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2020-11-28 03:11:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:11:30,782 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 63 transitions. [2020-11-28 03:11:30,796 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-28 03:11:30,803 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 55 transitions. [2020-11-28 03:11:30,804 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-11-28 03:11:30,805 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2020-11-28 03:11:30,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 55 transitions. [2020-11-28 03:11:30,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:11:30,807 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-28 03:11:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 55 transitions. [2020-11-28 03:11:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-28 03:11:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 03:11:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2020-11-28 03:11:30,835 INFO L714 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-28 03:11:30,835 INFO L594 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-28 03:11:30,835 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:11:30,836 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 55 transitions. [2020-11-28 03:11:30,837 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-28 03:11:30,837 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:30,837 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:30,838 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:30,838 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:30,838 INFO L794 eck$LassoCheckResult]: Stem: 134#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(24); 120#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~short25, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_#t~nondet31, main_#t~malloc35.base, main_#t~malloc35.offset, main_#t~mem36.base, main_#t~mem36.offset, main_#t~nondet34, main_#t~mem38.base, main_#t~mem38.offset, main_#t~mem37, main_#t~mem40.base, main_#t~mem40.offset, main_#t~mem39, main_#t~mem41, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~pred~0.base, main_~pred~0.offset, main_~a~0.base, main_~a~0.offset, main_~t~0.base, main_~t~0.offset, main_~p~0.base, main_~p~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 102#L568-2 [2020-11-28 03:11:30,839 INFO L796 eck$LassoCheckResult]: Loop: 102#L568-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 107#L558-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 104#L557-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 105#L557-3 assume !main_#t~short9;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset; 115#L557-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 122#L563 assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc15.base, main_#t~malloc15.offset, main_~n~0.base, main_~n~0.offset, 4);call main_#t~mem16.base, main_#t~mem16.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem16.base, main_#t~mem16.offset, 4);havoc main_#t~mem16.base, main_#t~mem16.offset;call main_#t~mem17.base, main_#t~mem17.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset; 123#L563-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 101#L568 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 102#L568-2 [2020-11-28 03:11:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:30,839 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2020-11-28 03:11:30,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:30,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860332124] [2020-11-28 03:11:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:30,867 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:30,886 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:30,893 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:30,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2020-11-28 03:11:30,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:30,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577785260] [2020-11-28 03:11:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:31,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577785260] [2020-11-28 03:11:31,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:31,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:11:31,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886174405] [2020-11-28 03:11:31,095 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:11:31,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:31,097 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. cyclomatic complexity: 27 Second operand 5 states. [2020-11-28 03:11:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:31,340 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2020-11-28 03:11:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:11:31,342 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 65 transitions. [2020-11-28 03:11:31,344 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 36 [2020-11-28 03:11:31,347 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 44 states and 65 transitions. [2020-11-28 03:11:31,347 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2020-11-28 03:11:31,348 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2020-11-28 03:11:31,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 65 transitions. [2020-11-28 03:11:31,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:11:31,349 INFO L691 BuchiCegarLoop]: Abstraction has 44 states and 65 transitions. [2020-11-28 03:11:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 65 transitions. [2020-11-28 03:11:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-11-28 03:11:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 03:11:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 59 transitions. [2020-11-28 03:11:31,363 INFO L714 BuchiCegarLoop]: Abstraction has 40 states and 59 transitions. [2020-11-28 03:11:31,363 INFO L594 BuchiCegarLoop]: Abstraction has 40 states and 59 transitions. [2020-11-28 03:11:31,363 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:11:31,363 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 40 states and 59 transitions. [2020-11-28 03:11:31,368 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 33 [2020-11-28 03:11:31,368 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:31,368 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:31,369 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:31,369 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:31,370 INFO L794 eck$LassoCheckResult]: Stem: 226#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(24); 209#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~short25, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_#t~nondet31, main_#t~malloc35.base, main_#t~malloc35.offset, main_#t~mem36.base, main_#t~mem36.offset, main_#t~nondet34, main_#t~mem38.base, main_#t~mem38.offset, main_#t~mem37, main_#t~mem40.base, main_#t~mem40.offset, main_#t~mem39, main_#t~mem41, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~pred~0.base, main_~pred~0.offset, main_~a~0.base, main_~a~0.offset, main_~t~0.base, main_~t~0.offset, main_~p~0.base, main_~p~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 193#L568-2 [2020-11-28 03:11:31,370 INFO L796 eck$LassoCheckResult]: Loop: 193#L568-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 199#L558-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 195#L557-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 196#L557-3 assume !main_#t~short9;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset; 229#L557-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 214#L563 assume !((main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14);havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14; 215#L563-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 192#L568 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 193#L568-2 [2020-11-28 03:11:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2020-11-28 03:11:31,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:31,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16458056] [2020-11-28 03:11:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:31,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:31,440 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:31,447 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:31,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2020-11-28 03:11:31,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:31,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828446889] [2020-11-28 03:11:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:31,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:31,475 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:31,480 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2020-11-28 03:11:31,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:31,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549333710] [2020-11-28 03:11:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:31,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549333710] [2020-11-28 03:11:31,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:31,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:11:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185811277] [2020-11-28 03:11:31,918 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-11-28 03:11:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:31,992 INFO L87 Difference]: Start difference. First operand 40 states and 59 transitions. cyclomatic complexity: 28 Second operand 5 states. [2020-11-28 03:11:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:32,449 INFO L93 Difference]: Finished difference Result 92 states and 137 transitions. [2020-11-28 03:11:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:11:32,449 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 92 states and 137 transitions. [2020-11-28 03:11:32,452 INFO L131 ngComponentsAnalysis]: Automaton has 14 accepting balls. 60 [2020-11-28 03:11:32,457 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 92 states to 92 states and 137 transitions. [2020-11-28 03:11:32,457 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 92 [2020-11-28 03:11:32,458 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 92 [2020-11-28 03:11:32,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 137 transitions. [2020-11-28 03:11:32,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:11:32,459 INFO L691 BuchiCegarLoop]: Abstraction has 92 states and 137 transitions. [2020-11-28 03:11:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states and 137 transitions. [2020-11-28 03:11:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2020-11-28 03:11:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 03:11:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 69 transitions. [2020-11-28 03:11:32,468 INFO L714 BuchiCegarLoop]: Abstraction has 48 states and 69 transitions. [2020-11-28 03:11:32,469 INFO L594 BuchiCegarLoop]: Abstraction has 48 states and 69 transitions. [2020-11-28 03:11:32,469 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:11:32,469 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 48 states and 69 transitions. [2020-11-28 03:11:32,470 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 41 [2020-11-28 03:11:32,470 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:32,470 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:32,471 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:32,471 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:32,471 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(24); 358#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~short25, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_#t~nondet31, main_#t~malloc35.base, main_#t~malloc35.offset, main_#t~mem36.base, main_#t~mem36.offset, main_#t~nondet34, main_#t~mem38.base, main_#t~mem38.offset, main_#t~mem37, main_#t~mem40.base, main_#t~mem40.offset, main_#t~mem39, main_#t~mem41, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~pred~0.base, main_~pred~0.offset, main_~a~0.base, main_~a~0.offset, main_~t~0.base, main_~t~0.offset, main_~p~0.base, main_~p~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 339#L568-2 [2020-11-28 03:11:32,471 INFO L796 eck$LassoCheckResult]: Loop: 339#L568-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 369#L558-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 342#L557-1 assume !main_#t~short9; 343#L557-3 assume !main_#t~short9;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset; 383#L557-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 380#L563 assume !((main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14);havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14; 381#L563-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 338#L568 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 339#L568-2 [2020-11-28 03:11:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2020-11-28 03:11:32,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:32,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330950420] [2020-11-28 03:11:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:32,495 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:32,504 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:32,511 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:32,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2020-11-28 03:11:32,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:32,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82771670] [2020-11-28 03:11:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:32,521 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:32,528 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:32,532 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2020-11-28 03:11:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:32,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193740300] [2020-11-28 03:11:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:32,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:32,608 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:32,625 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:32,799 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-11-28 03:11:33,300 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-11-28 03:11:33,361 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:11:33,542 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-28 03:11:33,544 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:11:33,545 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:11:33,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:187, output treesize:175 [2020-11-28 03:11:33,723 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-28 03:11:33,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:11:33 BoogieIcfgContainer [2020-11-28 03:11:33,836 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:11:33,837 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:11:33,837 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:11:33,837 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:11:33,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:30" (3/4) ... [2020-11-28 03:11:33,841 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-28 03:11:33,901 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8665146e-2ef7-4c45-82c5-cdd4d4aa24ae/bin/uautomizer/witness.graphml [2020-11-28 03:11:33,901 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:11:33,903 INFO L168 Benchmark]: Toolchain (without parser) took 5549.56 ms. Allocated memory was 92.3 MB in the beginning and 161.5 MB in the end (delta: 69.2 MB). Free memory was 52.2 MB in the beginning and 117.4 MB in the end (delta: -65.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:33,904 INFO L168 Benchmark]: CDTParser took 1.05 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 69.6 MB in the end (delta: 61.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:33,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 669.89 ms. Allocated memory was 92.3 MB in the beginning and 127.9 MB in the end (delta: 35.7 MB). Free memory was 52.0 MB in the beginning and 93.5 MB in the end (delta: -41.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:33,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.87 ms. Allocated memory is still 127.9 MB. Free memory was 93.5 MB in the beginning and 91.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:33,906 INFO L168 Benchmark]: Boogie Preprocessor took 79.69 ms. Allocated memory is still 127.9 MB. Free memory was 91.3 MB in the beginning and 88.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:33,907 INFO L168 Benchmark]: RCFGBuilder took 937.30 ms. Allocated memory is still 127.9 MB. Free memory was 88.5 MB in the beginning and 53.7 MB in the end (delta: 34.8 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:33,908 INFO L168 Benchmark]: BuchiAutomizer took 3678.55 ms. Allocated memory was 127.9 MB in the beginning and 161.5 MB in the end (delta: 33.6 MB). Free memory was 52.8 MB in the beginning and 118.4 MB in the end (delta: -65.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:33,909 INFO L168 Benchmark]: Witness Printer took 64.18 ms. Allocated memory is still 161.5 MB. Free memory was 118.4 MB in the beginning and 117.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:33,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 69.6 MB in the end (delta: 61.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 669.89 ms. Allocated memory was 92.3 MB in the beginning and 127.9 MB in the end (delta: 35.7 MB). Free memory was 52.0 MB in the beginning and 93.5 MB in the end (delta: -41.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 111.87 ms. Allocated memory is still 127.9 MB. Free memory was 93.5 MB in the beginning and 91.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.69 ms. Allocated memory is still 127.9 MB. Free memory was 91.3 MB in the beginning and 88.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 937.30 ms. Allocated memory is still 127.9 MB. Free memory was 88.5 MB in the beginning and 53.7 MB in the end (delta: 34.8 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3678.55 ms. Allocated memory was 127.9 MB in the beginning and 161.5 MB in the end (delta: 33.6 MB). Free memory was 52.8 MB in the beginning and 118.4 MB in the end (delta: -65.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 64.18 ms. Allocated memory is still 161.5 MB. Free memory was 118.4 MB in the beginning and 117.4 MB in the end (delta: 1.0 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 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 48 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.6s. Construction of modules took 0.4s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 48 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 48 states and ocurred in iteration 3. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 167 SDtfs, 71 SDslu, 179 SDs, 0 SdLazy, 191 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time 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: 555]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=16074} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5d45e0b1=0, NULL=0, NULL=16076, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6e4cedea=0, NULL=16074, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3690faad=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@71ecd718=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@18aedbf3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3d56cbc5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1014dde7=0, root=16073, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@716fb6c1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@17c3e0f2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5d45e0b1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@71ecd718=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2ea28dcf=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6e4cedea=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@19101a99=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5ae425ec=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@71b6bc58=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6425e736=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@86e43ae=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@17c3e0f2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1b05b6f5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4aaa2060=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@52124b11=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4aaa2060=16073, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3d56cbc5=0, a=0, pred=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@716fb6c1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3690faad=0, p=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@66221bb5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6f7696fe=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4b69949a=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@69048b32=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e0a69f9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6bda6145=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@52124b11=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@36d4579f=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@12ceda7f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@18aedbf3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ff94191=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@14e4c382=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4b69949a=0, n=16073, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@14e4c382=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@471f6491=0, a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@65621e3a=0, t=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2e9f1290=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6eca3e64=23, p=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@54bc1a87=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6f7696fe=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@19101a99=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1014dde7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6bda6145=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@12ceda7f=0, t=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@71b6bc58=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@8ddb5e4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6e386415=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ff94191=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@66221bb5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@6737cb61=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1b05b6f5=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@54bc1a87=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2eb5508d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@36d4579f=0, pred=0, NULL=16075, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5ae425ec=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2eb5508d=0, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@69048b32=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 555]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) Loop: [L555] COND TRUE __VERIFIER_nondet_int() [L556] n = root [L557] EXPR n->left [L557] n->left && n->right [L557] COND FALSE !(n->left && n->right) [L563] EXPR n->left [L563] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L568] EXPR n->right [L568] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...