./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.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_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/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 43439d71f7b47b10e5196ff582d5d2564aed0e67 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 23:59:41,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:59:41,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:59:41,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:59:41,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:59:41,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:59:41,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:59:41,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:59:41,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:59:41,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:59:41,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:59:41,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:59:41,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:59:41,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:59:41,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:59:41,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:59:41,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:59:41,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:59:41,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:59:41,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:59:41,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:59:41,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:59:41,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:59:41,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:59:41,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:59:41,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:59:41,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:59:41,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:59:41,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:59:41,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:59:41,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:59:41,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:59:41,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:59:41,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:59:41,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:59:41,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:59:41,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:59:41,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:59:41,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:59:41,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:59:41,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:59:41,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 23:59:41,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:59:41,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:59:41,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:59:41,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:59:41,456 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:59:41,456 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:59:41,456 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:59:41,457 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:59:41,457 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:59:41,457 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:59:41,458 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:59:41,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:59:41,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:59:41,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:59:41,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:59:41,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:59:41,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:59:41,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:59:41,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:59:41,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:59:41,461 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:59:41,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:59:41,461 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:59:41,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:59:41,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:59:41,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:59:41,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:59:41,463 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:59:41,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:59:41,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:59:41,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:59:41,464 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:59:41,465 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:59:41,465 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_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43439d71f7b47b10e5196ff582d5d2564aed0e67 [2020-11-29 23:59:41,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:59:41,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:59:41,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:59:41,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:59:41,823 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:59:41,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2020-11-29 23:59:41,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/data/d0b3d4f9a/49345d6e5ee048d9865eef77aa4e5ee0/FLAGb86d03c61 [2020-11-29 23:59:42,443 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:59:42,444 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2020-11-29 23:59:42,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/data/d0b3d4f9a/49345d6e5ee048d9865eef77aa4e5ee0/FLAGb86d03c61 [2020-11-29 23:59:42,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/data/d0b3d4f9a/49345d6e5ee048d9865eef77aa4e5ee0 [2020-11-29 23:59:42,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:59:42,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:59:42,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:59:42,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:59:42,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:59:42,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:59:42" (1/1) ... [2020-11-29 23:59:42,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e279fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:42, skipping insertion in model container [2020-11-29 23:59:42,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:59:42" (1/1) ... [2020-11-29 23:59:42,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:59:42,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:59:43,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:59:43,299 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:59:43,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:59:43,442 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:59:43,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43 WrapperNode [2020-11-29 23:59:43,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:59:43,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:59:43,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:59:43,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:59:43,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:59:43,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:59:43,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:59:43,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:59:43,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... [2020-11-29 23:59:43,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:59:43,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:59:43,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:59:43,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:59:43,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/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 23:59:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 23:59:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 23:59:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:59:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 23:59:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:59:43,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:59:43,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:59:43,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:59:44,529 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:59:44,530 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-29 23:59:44,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:44 BoogieIcfgContainer [2020-11-29 23:59:44,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:59:44,533 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:59:44,533 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:59:44,537 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:59:44,538 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:59:44,538 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:59:42" (1/3) ... [2020-11-29 23:59:44,539 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1d2d2c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:59:44, skipping insertion in model container [2020-11-29 23:59:44,539 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:59:44,540 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:43" (2/3) ... [2020-11-29 23:59:44,540 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1d2d2c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:59:44, skipping insertion in model container [2020-11-29 23:59:44,540 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:59:44,541 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:44" (3/3) ... [2020-11-29 23:59:44,542 INFO L373 chiAutomizerObserver]: Analyzing ICFG tree_parent_ptr.i [2020-11-29 23:59:44,615 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:59:44,615 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:59:44,615 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:59:44,615 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:59:44,616 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:59:44,616 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:59:44,616 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:59:44,616 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:59:44,631 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-29 23:59:44,661 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 23:59:44,661 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:44,661 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:44,668 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:44,669 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:59:44,669 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:59:44,669 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-29 23:59:44,671 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 23:59:44,672 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:44,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:44,672 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:44,672 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:59:44,681 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(18); 10#L-1true havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~mem19.base, main_#t~mem19.offset, main_#t~nondet20, main_#t~malloc21.base, main_#t~malloc21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~nondet6, main_#t~malloc25.base, main_#t~malloc25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~malloc29.base, main_#t~malloc29.offset, main_#t~mem30.base, main_#t~mem30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(12);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 18#L552-2true [2020-11-29 23:59:44,681 INFO L796 eck$LassoCheckResult]: Loop: 18#L552-2true 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; 20#L541-2true assume !true; 7#L540-5true call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 6#L546true 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(12);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;call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(main_~n~0.base, main_~n~0.offset, main_#t~mem18.base, 8 + main_#t~mem18.offset, 4);havoc main_#t~mem18.base, main_#t~mem18.offset; 9#L546-2true call main_#t~mem19.base, main_#t~mem19.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 13#L552true assume !((main_#t~mem19.base == 0 && main_#t~mem19.offset == 0) && 0 != main_#t~nondet20);havoc main_#t~nondet20;havoc main_#t~mem19.base, main_#t~mem19.offset; 18#L552-2true [2020-11-29 23:59:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:44,698 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-29 23:59:44,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:44,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767165134] [2020-11-29 23:59:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:44,820 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:44,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:44,883 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2020-11-29 23:59:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:44,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322540380] [2020-11-29 23:59:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:44,930 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 23:59:44,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322540380] [2020-11-29 23:59:44,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:44,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:59:44,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957581967] [2020-11-29 23:59:44,937 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 23:59:44,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:44,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:59:44,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:59:44,955 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-29 23:59:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:44,968 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2020-11-29 23:59:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:59:44,970 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 29 transitions. [2020-11-29 23:59:44,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 23:59:44,981 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 17 states and 25 transitions. [2020-11-29 23:59:44,982 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 23:59:44,983 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 23:59:44,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 25 transitions. [2020-11-29 23:59:44,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:59:44,989 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-29 23:59:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 25 transitions. [2020-11-29 23:59:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 23:59:45,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 23:59:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2020-11-29 23:59:45,011 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-29 23:59:45,011 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-29 23:59:45,011 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:59:45,011 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 25 transitions. [2020-11-29 23:59:45,012 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 23:59:45,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:45,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:45,012 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:45,013 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:45,013 INFO L794 eck$LassoCheckResult]: Stem: 64#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(18); 61#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~mem19.base, main_#t~mem19.offset, main_#t~nondet20, main_#t~malloc21.base, main_#t~malloc21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~nondet6, main_#t~malloc25.base, main_#t~malloc25.offset, 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~malloc29.base, main_#t~malloc29.offset, main_#t~mem30.base, main_#t~mem30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(12);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);call write~$Pointer$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 62#L552-2 [2020-11-29 23:59:45,013 INFO L796 eck$LassoCheckResult]: Loop: 62#L552-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 65#L541-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 66#L540-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 50#L540-3 assume !main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~short9; 51#L540-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 57#L546 assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(12);call write~$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$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset;call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(main_~n~0.base, main_~n~0.offset, main_#t~mem18.base, 8 + main_#t~mem18.offset, 4);havoc main_#t~mem18.base, main_#t~mem18.offset; 58#L546-2 call main_#t~mem19.base, main_#t~mem19.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 60#L552 assume !((main_#t~mem19.base == 0 && main_#t~mem19.offset == 0) && 0 != main_#t~nondet20);havoc main_#t~nondet20;havoc main_#t~mem19.base, main_#t~mem19.offset; 62#L552-2 [2020-11-29 23:59:45,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:45,014 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2020-11-29 23:59:45,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:45,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223402963] [2020-11-29 23:59:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:45,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:45,057 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:45,063 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2020-11-29 23:59:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:45,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441650573] [2020-11-29 23:59:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:45,214 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 23:59:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441650573] [2020-11-29 23:59:45,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:45,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:59:45,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003096129] [2020-11-29 23:59:45,215 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 23:59:45,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:59:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:59:45,216 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. cyclomatic complexity: 10 Second operand 5 states. [2020-11-29 23:59:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:45,481 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2020-11-29 23:59:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:59:45,483 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 35 transitions. [2020-11-29 23:59:45,484 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 23:59:45,487 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 35 transitions. [2020-11-29 23:59:45,487 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-11-29 23:59:45,488 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-11-29 23:59:45,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2020-11-29 23:59:45,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:59:45,488 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2020-11-29 23:59:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2020-11-29 23:59:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-11-29 23:59:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 23:59:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2020-11-29 23:59:45,495 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-29 23:59:45,495 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-29 23:59:45,495 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:59:45,495 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2020-11-29 23:59:45,496 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2020-11-29 23:59:45,498 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:45,498 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:45,498 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:45,499 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:45,499 INFO L794 eck$LassoCheckResult]: Stem: 117#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(18); 114#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~mem19.base, main_#t~mem19.offset, main_#t~nondet20, main_#t~malloc21.base, main_#t~malloc21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~nondet6, main_#t~malloc25.base, main_#t~malloc25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~malloc29.base, main_#t~malloc29.offset, main_#t~mem30.base, main_#t~mem30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(12);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 115#L552-2 [2020-11-29 23:59:45,499 INFO L796 eck$LassoCheckResult]: Loop: 115#L552-2 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; 118#L541-2 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; 119#L540-1 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; 101#L540-3 assume !main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~short9; 102#L540-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 108#L546 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; 109#L546-2 call main_#t~mem19.base, main_#t~mem19.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 113#L552 assume !((main_#t~mem19.base == 0 && main_#t~mem19.offset == 0) && 0 != main_#t~nondet20);havoc main_#t~nondet20;havoc main_#t~mem19.base, main_#t~mem19.offset; 115#L552-2 [2020-11-29 23:59:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2020-11-29 23:59:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:45,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841501625] [2020-11-29 23:59:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:45,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:45,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:45,580 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2020-11-29 23:59:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:45,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841966145] [2020-11-29 23:59:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:45,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:45,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:45,624 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2020-11-29 23:59:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:45,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341676311] [2020-11-29 23:59:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:45,716 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 23:59:45,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341676311] [2020-11-29 23:59:45,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:45,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:59:45,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823312943] [2020-11-29 23:59:45,934 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-11-29 23:59:45,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:45,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:59:45,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:59:45,995 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. cyclomatic complexity: 11 Second operand 5 states. [2020-11-29 23:59:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:46,321 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2020-11-29 23:59:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:59:46,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 46 transitions. [2020-11-29 23:59:46,324 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-11-29 23:59:46,326 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 46 transitions. [2020-11-29 23:59:46,326 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-11-29 23:59:46,326 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-11-29 23:59:46,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 46 transitions. [2020-11-29 23:59:46,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:59:46,327 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 46 transitions. [2020-11-29 23:59:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 46 transitions. [2020-11-29 23:59:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-29 23:59:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 23:59:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2020-11-29 23:59:46,331 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2020-11-29 23:59:46,331 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2020-11-29 23:59:46,331 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:59:46,331 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 39 transitions. [2020-11-29 23:59:46,332 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-11-29 23:59:46,332 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:59:46,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:59:46,336 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:59:46,336 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:46,337 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(18); 180#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~mem19.base, main_#t~mem19.offset, main_#t~nondet20, main_#t~malloc21.base, main_#t~malloc21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~mem23.base, main_#t~mem23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~nondet6, main_#t~malloc25.base, main_#t~malloc25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~mem27.base, main_#t~mem27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~malloc29.base, main_#t~malloc29.offset, main_#t~mem30.base, main_#t~mem30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_#t~malloc32.base, main_#t~malloc32.offset, main_#t~mem33.base, main_#t~mem33.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(12);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 181#L552-2 [2020-11-29 23:59:46,337 INFO L796 eck$LassoCheckResult]: Loop: 181#L552-2 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; 192#L541-2 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; 189#L540-1 assume !main_#t~short9; 190#L540-3 assume !main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~short9; 195#L540-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 193#L546 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; 178#L546-2 call main_#t~mem19.base, main_#t~mem19.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 179#L552 assume !((main_#t~mem19.base == 0 && main_#t~mem19.offset == 0) && 0 != main_#t~nondet20);havoc main_#t~nondet20;havoc main_#t~mem19.base, main_#t~mem19.offset; 181#L552-2 [2020-11-29 23:59:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2020-11-29 23:59:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:46,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696101687] [2020-11-29 23:59:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:46,363 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:46,384 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:46,388 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2020-11-29 23:59:46,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:46,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945141155] [2020-11-29 23:59:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:46,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:46,438 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:46,441 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:46,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2020-11-29 23:59:46,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:46,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238859619] [2020-11-29 23:59:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:46,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:59:46,499 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:59:46,506 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:59:46,690 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-11-29 23:59:47,360 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 103 [2020-11-29 23:59:47,420 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 23:59:47,726 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-29 23:59:47,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 23:59:47,740 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 23:59:48,004 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-29 23:59:48,004 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 23:59:48,006 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 23:59:48,007 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:216, output treesize:190 [2020-11-29 23:59:48,236 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-29 23:59:48,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:59:48 BoogieIcfgContainer [2020-11-29 23:59:48,296 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:59:48,296 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:59:48,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:59:48,297 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:59:48,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:44" (3/4) ... [2020-11-29 23:59:48,301 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 23:59:48,341 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5aaf0cc3-d2a9-431f-9b53-f5508ad1f0b6/bin/uautomizer/witness.graphml [2020-11-29 23:59:48,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:59:48,343 INFO L168 Benchmark]: Toolchain (without parser) took 5582.64 ms. Allocated memory was 92.3 MB in the beginning and 151.0 MB in the end (delta: 58.7 MB). Free memory was 60.8 MB in the beginning and 90.3 MB in the end (delta: -29.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,344 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 92.3 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:59:48,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.69 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 60.5 MB in the beginning and 89.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,346 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.96 ms. Allocated memory is still 125.8 MB. Free memory was 89.7 MB in the beginning and 87.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,347 INFO L168 Benchmark]: Boogie Preprocessor took 66.48 ms. Allocated memory is still 125.8 MB. Free memory was 87.6 MB in the beginning and 85.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,348 INFO L168 Benchmark]: RCFGBuilder took 942.01 ms. Allocated memory is still 125.8 MB. Free memory was 85.5 MB in the beginning and 53.4 MB in the end (delta: 32.2 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,349 INFO L168 Benchmark]: BuchiAutomizer took 3763.18 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 53.4 MB in the beginning and 92.2 MB in the end (delta: -38.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,349 INFO L168 Benchmark]: Witness Printer took 45.19 ms. Allocated memory is still 151.0 MB. Free memory was 92.2 MB in the beginning and 90.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:59:48,354 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 92.3 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 680.69 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 60.5 MB in the beginning and 89.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.96 ms. Allocated memory is still 125.8 MB. Free memory was 89.7 MB in the beginning and 87.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.48 ms. Allocated memory is still 125.8 MB. Free memory was 87.6 MB in the beginning and 85.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 942.01 ms. Allocated memory is still 125.8 MB. Free memory was 85.5 MB in the beginning and 53.4 MB in the end (delta: 32.2 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3763.18 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 53.4 MB in the beginning and 92.2 MB in the end (delta: -38.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * Witness Printer took 45.19 ms. Allocated memory is still 151.0 MB. Free memory was 92.2 MB in the beginning and 90.3 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 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.6s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.8s. Construction of modules took 0.4s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 3. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 68 SDtfs, 29 SDslu, 60 SDs, 0 SdLazy, 100 SolverSat, 11 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: 538]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=21279} State at position 1 is {s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@53433b5f=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4ce6d325=0, NULL=21281, NULL=21279, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1b744aed=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2627e522=0, root=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6d46d46f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4625f735=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@53433b5f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@9e593a1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@34dafd18=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@71ebb242=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5bf94538=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4625f735=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5f95473e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@71f6555=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4819514=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@71f6555=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2627e522=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6d46d46f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2952d5b3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@32954cbd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4043c50c=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@63747fa6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6d86c30c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4819514=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@61246a47=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@aa6537c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2952d5b3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1b744aed=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e524cc6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@e9563c2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4043c50c=0, n=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@e9563c2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@791ef21a=29, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@32954cbd=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4ce6d325=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@34dafd18=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@20d02713=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@43652e2c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6d86c30c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@aa6537c=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@7fd075fc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e524cc6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@43652e2c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@20d02713=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5f95473e=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@71ebb242=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@260a5e6a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4c9c5002=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@61246a47=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4c9c5002=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1d9c1903=0, NULL=21280, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@260a5e6a=0, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@63747fa6=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 538]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L534] struct TreeNode* root = malloc(sizeof(*root)), *n; [L535] root->left = ((void *)0) [L536] root->right = ((void *)0) [L537] root->parent = ((void *)0) Loop: [L538] COND TRUE __VERIFIER_nondet_int() [L539] n = root [L540] EXPR n->left [L540] n->left && n->right [L540] COND FALSE !(n->left && n->right) [L546] EXPR n->left [L546] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L552] EXPR n->right [L552] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...