./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_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/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_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/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 [2020-11-29 23:59:20,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:59:20,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:59:20,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:59:20,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:59:20,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:59:20,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:59:20,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:59:20,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:59:20,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:59:20,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:59:20,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:59:20,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:59:20,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:59:20,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:59:20,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:59:20,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:59:20,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:59:20,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:59:20,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:59:20,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:59:20,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:59:20,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:59:20,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:59:20,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:59:20,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:59:20,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:59:20,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:59:20,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:59:20,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:59:20,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:59:20,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:59:20,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:59:20,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:59:20,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:59:20,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:59:20,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:59:20,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:59:20,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:59:20,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:59:20,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:59:20,463 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 23:59:20,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:59:20,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:59:20,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:59:20,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:59:20,491 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:59:20,491 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:59:20,491 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:59:20,492 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:59:20,492 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:59:20,492 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:59:20,492 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:59:20,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:59:20,493 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:59:20,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:59:20,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:59:20,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:59:20,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:59:20,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:59:20,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:59:20,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:59:20,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:59:20,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:59:20,495 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:59:20,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:59:20,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:59:20,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:59:20,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:59:20,496 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:59:20,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:59:20,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:59:20,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:59:20,497 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:59:20,498 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:59:20,498 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_b9e38381-d111-44ef-81da-fe6608020b5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 356492c77ca30b45c8c64fdda8fe0cb19edee2c6 [2020-11-29 23:59:20,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:59:20,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:59:20,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:59:20,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:59:20,784 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:59:20,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2020-11-29 23:59:20,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/data/f58a97ce4/043c7b38a5b4480d9f530557cddd09ff/FLAG36ec2fb00 [2020-11-29 23:59:21,430 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:59:21,430 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2020-11-29 23:59:21,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/data/f58a97ce4/043c7b38a5b4480d9f530557cddd09ff/FLAG36ec2fb00 [2020-11-29 23:59:21,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/data/f58a97ce4/043c7b38a5b4480d9f530557cddd09ff [2020-11-29 23:59:21,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:59:21,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:59:21,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:59:21,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:59:21,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:59:21,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:59:21" (1/1) ... [2020-11-29 23:59:21,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:21, skipping insertion in model container [2020-11-29 23:59:21,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:59:21" (1/1) ... [2020-11-29 23:59:21,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:59:21,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:59:22,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:59:22,200 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:59:22,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:59:22,320 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:59:22,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22 WrapperNode [2020-11-29 23:59:22,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:59:22,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:59:22,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:59:22,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:59:22,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:59:22,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:59:22,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:59:22,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:59:22,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... [2020-11-29 23:59:22,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:59:22,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:59:22,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:59:22,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:59:22,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/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 [2020-11-29 23:59:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:59:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:59:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 23:59:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 23:59:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:59:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 23:59:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:59:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:59:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:59:22,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:59:23,298 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:59:23,298 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 23:59:23,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:23 BoogieIcfgContainer [2020-11-29 23:59:23,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:59:23,302 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:59:23,302 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:59:23,305 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:59:23,306 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:59:23,306 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:59:21" (1/3) ... [2020-11-29 23:59:23,307 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6dbf3fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:59:23, skipping insertion in model container [2020-11-29 23:59:23,307 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:59:23,308 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:22" (2/3) ... [2020-11-29 23:59:23,308 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6dbf3fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:59:23, skipping insertion in model container [2020-11-29 23:59:23,309 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:59:23,309 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:23" (3/3) ... [2020-11-29 23:59:23,310 INFO L373 chiAutomizerObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-11-29 23:59:23,369 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:59:23,369 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:59:23,370 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:59:23,370 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:59:23,370 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:59:23,370 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:59:23,370 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:59:23,370 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:59:23,388 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 46 states. [2020-11-29 23:59:23,414 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-29 23:59:23,414 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:23,414 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:23,419 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:23,420 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:59:23,420 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:59:23,420 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 46 states. [2020-11-29 23:59:23,424 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-29 23:59:23,424 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:23,424 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:23,425 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:23,425 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:59:23,430 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$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 8#L568-2true [2020-11-29 23:59:23,431 INFO L796 eck$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~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;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 [2020-11-29 23:59:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-29 23:59:23,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:23,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117883385] [2020-11-29 23:59:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:23,547 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:23,595 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:23,626 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2020-11-29 23:59:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:23,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266354298] [2020-11-29 23:59:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:23,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266354298] [2020-11-29 23:59:23,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:23,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:59:23,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477808440] [2020-11-29 23:59:23,682 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 23:59:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:59:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:59:23,700 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-11-29 23:59:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:23,707 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2020-11-29 23:59:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:59:23,708 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 63 transitions. [2020-11-29 23:59:23,711 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-29 23:59:23,714 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 55 transitions. [2020-11-29 23:59:23,715 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-11-29 23:59:23,715 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2020-11-29 23:59:23,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 55 transitions. [2020-11-29 23:59:23,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:59:23,717 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-29 23:59:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 55 transitions. [2020-11-29 23:59:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-29 23:59:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 23:59:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2020-11-29 23:59:23,745 INFO L714 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-29 23:59:23,745 INFO L594 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-29 23:59:23,745 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:59:23,746 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 55 transitions. [2020-11-29 23:59:23,747 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 30 [2020-11-29 23:59:23,747 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:23,747 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:23,748 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:23,748 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:23,748 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 [2020-11-29 23:59:23,748 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$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 105#L557-3 assume !main_#t~short9;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~short9; 115#L557-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 122#L563 assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$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 [2020-11-29 23:59:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2020-11-29 23:59:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:23,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920547161] [2020-11-29 23:59:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:23,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:23,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:23,805 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:23,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2020-11-29 23:59:23,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:23,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495863404] [2020-11-29 23:59:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:23,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495863404] [2020-11-29 23:59:23,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:23,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:59:23,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590850642] [2020-11-29 23:59:23,992 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 23:59:23,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:59:23,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:59:23,996 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. cyclomatic complexity: 27 Second operand 5 states. [2020-11-29 23:59:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:24,244 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2020-11-29 23:59:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:59:24,246 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 65 transitions. [2020-11-29 23:59:24,248 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 36 [2020-11-29 23:59:24,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 44 states and 65 transitions. [2020-11-29 23:59:24,251 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2020-11-29 23:59:24,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2020-11-29 23:59:24,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 65 transitions. [2020-11-29 23:59:24,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:59:24,255 INFO L691 BuchiCegarLoop]: Abstraction has 44 states and 65 transitions. [2020-11-29 23:59:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 65 transitions. [2020-11-29 23:59:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-11-29 23:59:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 23:59:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 59 transitions. [2020-11-29 23:59:24,265 INFO L714 BuchiCegarLoop]: Abstraction has 40 states and 59 transitions. [2020-11-29 23:59:24,265 INFO L594 BuchiCegarLoop]: Abstraction has 40 states and 59 transitions. [2020-11-29 23:59:24,265 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:59:24,266 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 40 states and 59 transitions. [2020-11-29 23:59:24,269 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 33 [2020-11-29 23:59:24,270 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:24,270 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:24,271 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:24,271 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:24,271 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$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 193#L568-2 [2020-11-29 23:59:24,271 INFO L796 eck$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~mem7.base, main_#t~mem7.offset;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~short9; 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~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset; 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 [2020-11-29 23:59:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2020-11-29 23:59:24,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:24,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395102398] [2020-11-29 23:59:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:24,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:24,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:24,333 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2020-11-29 23:59:24,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:24,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909715197] [2020-11-29 23:59:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:24,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:24,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:24,379 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:24,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2020-11-29 23:59:24,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:24,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457127391] [2020-11-29 23:59:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:24,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457127391] [2020-11-29 23:59:24,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:24,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:59:24,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828494837] [2020-11-29 23:59:24,660 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-11-29 23:59:24,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:24,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:59:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:59:24,732 INFO L87 Difference]: Start difference. First operand 40 states and 59 transitions. cyclomatic complexity: 28 Second operand 5 states. [2020-11-29 23:59:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:25,143 INFO L93 Difference]: Finished difference Result 92 states and 137 transitions. [2020-11-29 23:59:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:59:25,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 92 states and 137 transitions. [2020-11-29 23:59:25,146 INFO L131 ngComponentsAnalysis]: Automaton has 14 accepting balls. 60 [2020-11-29 23:59:25,148 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 92 states to 92 states and 137 transitions. [2020-11-29 23:59:25,148 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 92 [2020-11-29 23:59:25,149 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 92 [2020-11-29 23:59:25,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 137 transitions. [2020-11-29 23:59:25,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:59:25,150 INFO L691 BuchiCegarLoop]: Abstraction has 92 states and 137 transitions. [2020-11-29 23:59:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states and 137 transitions. [2020-11-29 23:59:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2020-11-29 23:59:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 23:59:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 69 transitions. [2020-11-29 23:59:25,163 INFO L714 BuchiCegarLoop]: Abstraction has 48 states and 69 transitions. [2020-11-29 23:59:25,163 INFO L594 BuchiCegarLoop]: Abstraction has 48 states and 69 transitions. [2020-11-29 23:59:25,163 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:59:25,163 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 48 states and 69 transitions. [2020-11-29 23:59:25,164 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 41 [2020-11-29 23:59:25,165 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:25,165 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:25,165 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:25,165 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:25,165 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$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 339#L568-2 [2020-11-29 23:59:25,166 INFO L796 eck$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~mem7.base, main_#t~mem7.offset;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~short9; 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~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset; 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 [2020-11-29 23:59:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2020-11-29 23:59:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:25,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677440988] [2020-11-29 23:59:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:25,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:25,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:25,212 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2020-11-29 23:59:25,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:25,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845786703] [2020-11-29 23:59:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:25,220 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:25,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:25,230 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2020-11-29 23:59:25,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:25,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009316731] [2020-11-29 23:59:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:25,258 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:25,273 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:25,283 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:25,415 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-11-29 23:59:25,823 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-11-29 23:59:25,859 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 23:59:26,005 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 23:59:26,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 23:59:26,008 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 23:59:26,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:187, output treesize:175 [2020-11-29 23:59:26,142 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 23:59:26,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:59:26 BoogieIcfgContainer [2020-11-29 23:59:26,194 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:59:26,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:59:26,195 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:59:26,195 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:59:26,196 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:23" (3/4) ... [2020-11-29 23:59:26,198 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 23:59:26,288 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b9e38381-d111-44ef-81da-fe6608020b5d/bin/uautomizer/witness.graphml [2020-11-29 23:59:26,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:59:26,290 INFO L168 Benchmark]: Toolchain (without parser) took 4550.31 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 74.3 MB in the beginning and 45.5 MB in the end (delta: 28.8 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,291 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 83.9 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:59:26,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 579.53 ms. Allocated memory is still 102.8 MB. Free memory was 73.7 MB in the beginning and 68.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.83 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 66.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,293 INFO L168 Benchmark]: Boogie Preprocessor took 79.89 ms. Allocated memory is still 102.8 MB. Free memory was 66.2 MB in the beginning and 64.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,293 INFO L168 Benchmark]: RCFGBuilder took 801.20 ms. Allocated memory is still 102.8 MB. Free memory was 64.1 MB in the beginning and 74.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,294 INFO L168 Benchmark]: BuchiAutomizer took 2892.88 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 74.4 MB in the beginning and 47.4 MB in the end (delta: 27.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,295 INFO L168 Benchmark]: Witness Printer took 93.67 ms. Allocated memory is still 136.3 MB. Free memory was 47.4 MB in the beginning and 45.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:26,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.81 ms. Allocated memory is still 83.9 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 579.53 ms. Allocated memory is still 102.8 MB. Free memory was 73.7 MB in the beginning and 68.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.83 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 66.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.89 ms. Allocated memory is still 102.8 MB. Free memory was 66.2 MB in the beginning and 64.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 801.20 ms. Allocated memory is still 102.8 MB. Free memory was 64.1 MB in the beginning and 74.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2892.88 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 74.4 MB in the beginning and 47.4 MB in the end (delta: 27.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. * Witness Printer took 93.67 ms. Allocated memory is still 136.3 MB. Free memory was 47.4 MB in the beginning and 45.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program 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 2.8s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.9s. 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@75450e5d=0, NULL=0, NULL=16076, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ed95ed3=0, NULL=16074, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@507a80fe=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1dded2d6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@20d0ea12=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@a8e5cbf=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3076d59f=0, root=16073, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@73a620bc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@69353aa8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@75450e5d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1dded2d6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@183a569b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ed95ed3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4966ef7e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1b343f24=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3e2fa23e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3a42bae1=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6a0f8411=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@69353aa8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1f2c0fef=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2719ab3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2f248270=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2719ab3=16073, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@a8e5cbf=0, a=0, pred=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@73a620bc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@507a80fe=0, p=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7e0c2a62=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@436d4d4a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@37cd1d54=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@252924c4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2b70c632=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@e960315=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2f248270=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6a95c2fd=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@e66eb5a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@20d0ea12=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e461ebb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@60b860a0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@37cd1d54=0, n=16073, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@60b860a0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7e274da8=0, a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2afa15f2=0, t=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@24abc49f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@593d1859=23, p=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@13f9036b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@436d4d4a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4966ef7e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3076d59f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@e960315=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@e66eb5a=0, t=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3e2fa23e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@453606da=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@408d8572=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e461ebb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7e0c2a62=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@1592230b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1f2c0fef=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@13f9036b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5403209=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6a95c2fd=0, pred=0, NULL=16075, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1b343f24=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5403209=0, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@252924c4=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...