./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_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/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 [2020-11-28 02:58:03,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:03,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:03,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:03,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:03,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:03,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:03,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:03,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:03,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:03,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:03,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:03,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:03,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:03,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:03,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:03,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:03,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:03,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:03,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:03,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:03,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:03,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:03,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:03,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:03,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:03,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:03,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:03,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:03,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:03,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:03,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:03,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:03,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:03,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:03,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:03,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:03,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:03,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:03,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:03,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:03,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 02:58:03,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:03,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:03,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:03,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:03,406 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:03,407 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 02:58:03,407 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 02:58:03,407 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 02:58:03,407 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 02:58:03,407 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 02:58:03,408 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 02:58:03,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:03,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:03,409 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:58:03,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:03,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:03,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:03,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 02:58:03,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 02:58:03,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 02:58:03,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:03,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:03,412 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 02:58:03,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:03,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 02:58:03,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:03,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:03,413 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 02:58:03,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:03,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:03,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:03,415 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 02:58:03,417 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 02:58:03,417 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_086216c5-5387-47cb-b2a2-86bc8da72549/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43439d71f7b47b10e5196ff582d5d2564aed0e67 [2020-11-28 02:58:03,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:03,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:03,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:03,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:03,698 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:03,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2020-11-28 02:58:03,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/data/55a8c5b79/c08fef1bfa56470ba8b75b54d2be7bdf/FLAGded38b14e [2020-11-28 02:58:04,334 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:04,334 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/sv-benchmarks/c/memsafety-ext/tree_parent_ptr.i [2020-11-28 02:58:04,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/data/55a8c5b79/c08fef1bfa56470ba8b75b54d2be7bdf/FLAGded38b14e [2020-11-28 02:58:04,636 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/data/55a8c5b79/c08fef1bfa56470ba8b75b54d2be7bdf [2020-11-28 02:58:04,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:04,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:04,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:04,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:04,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:04,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dad884a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04, skipping insertion in model container [2020-11-28 02:58:04,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:04,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:05,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:05,027 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:05,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:05,183 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:05,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05 WrapperNode [2020-11-28 02:58:05,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:05,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:05,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:05,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:05,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:05,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:05,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:05,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:05,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... [2020-11-28 02:58:05,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:05,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:05,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:05,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:05,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:58:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 02:58:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 02:58:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:58:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:05,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:06,121 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:06,121 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 02:58:06,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:06 BoogieIcfgContainer [2020-11-28 02:58:06,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:06,126 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 02:58:06,126 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 02:58:06,129 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 02:58:06,131 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:06,131 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:58:04" (1/3) ... [2020-11-28 02:58:06,132 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@531f0c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:58:06, skipping insertion in model container [2020-11-28 02:58:06,133 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:06,133 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:05" (2/3) ... [2020-11-28 02:58:06,133 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@531f0c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:58:06, skipping insertion in model container [2020-11-28 02:58:06,133 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:06,133 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:06" (3/3) ... [2020-11-28 02:58:06,135 INFO L373 chiAutomizerObserver]: Analyzing ICFG tree_parent_ptr.i [2020-11-28 02:58:06,194 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 02:58:06,194 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 02:58:06,194 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 02:58:06,194 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:06,194 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:06,194 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 02:58:06,194 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:06,195 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 02:58:06,211 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-28 02:58:06,235 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-28 02:58:06,235 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:06,235 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:06,241 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:06,242 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:58:06,242 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 02:58:06,242 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-28 02:58:06,245 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-28 02:58:06,245 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:06,246 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:06,246 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:06,246 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:58:06,254 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$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 18#L552-2true [2020-11-28 02:58:06,254 INFO L796 eck$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~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14;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~mem19.base, main_#t~mem19.offset;havoc main_#t~nondet20; 18#L552-2true [2020-11-28 02:58:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-28 02:58:06,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:06,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274498104] [2020-11-28 02:58:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:06,380 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:06,405 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:06,426 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2020-11-28 02:58:06,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:06,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541431310] [2020-11-28 02:58:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:06,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541431310] [2020-11-28 02:58:06,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:06,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:06,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124574780] [2020-11-28 02:58:06,467 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:06,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:06,485 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-28 02:58:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:06,492 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2020-11-28 02:58:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:06,493 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 29 transitions. [2020-11-28 02:58:06,495 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-28 02:58:06,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 17 states and 25 transitions. [2020-11-28 02:58:06,500 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-28 02:58:06,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-28 02:58:06,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 25 transitions. [2020-11-28 02:58:06,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:06,501 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-28 02:58:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 25 transitions. [2020-11-28 02:58:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 02:58:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 02:58:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2020-11-28 02:58:06,526 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-28 02:58:06,526 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2020-11-28 02:58:06,526 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 02:58:06,527 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 25 transitions. [2020-11-28 02:58:06,527 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-28 02:58:06,528 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:06,528 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:06,528 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:06,528 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:06,528 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 [2020-11-28 02:58:06,529 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$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 50#L540-3 assume !main_#t~short9;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset; 51#L540-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 57#L546 assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(12);call write~$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~mem19.base, main_#t~mem19.offset;havoc main_#t~nondet20; 62#L552-2 [2020-11-28 02:58:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2020-11-28 02:58:06,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:06,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330997745] [2020-11-28 02:58:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:06,549 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:06,567 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:06,573 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2020-11-28 02:58:06,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:06,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023680925] [2020-11-28 02:58:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023680925] [2020-11-28 02:58:06,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:06,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:58:06,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743277054] [2020-11-28 02:58:06,710 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:06,713 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. cyclomatic complexity: 10 Second operand 5 states. [2020-11-28 02:58:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:07,000 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2020-11-28 02:58:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:07,001 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 35 transitions. [2020-11-28 02:58:07,003 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 02:58:07,005 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 35 transitions. [2020-11-28 02:58:07,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-11-28 02:58:07,005 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-11-28 02:58:07,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2020-11-28 02:58:07,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:07,006 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2020-11-28 02:58:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2020-11-28 02:58:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-11-28 02:58:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 02:58:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2020-11-28 02:58:07,010 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-28 02:58:07,010 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-28 02:58:07,010 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 02:58:07,010 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2020-11-28 02:58:07,011 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2020-11-28 02:58:07,011 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:07,011 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:07,012 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:07,012 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:07,012 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$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 115#L552-2 [2020-11-28 02:58:07,012 INFO L796 eck$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~mem7.base, main_#t~mem7.offset;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset; 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~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14; 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~mem19.base, main_#t~mem19.offset;havoc main_#t~nondet20; 115#L552-2 [2020-11-28 02:58:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2020-11-28 02:58:07,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:07,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246113537] [2020-11-28 02:58:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:07,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:07,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:07,047 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2020-11-28 02:58:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:07,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68564329] [2020-11-28 02:58:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:07,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:07,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:07,071 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2020-11-28 02:58:07,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:07,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743563024] [2020-11-28 02:58:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:07,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743563024] [2020-11-28 02:58:07,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:07,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:58:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776779289] [2020-11-28 02:58:07,406 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-11-28 02:58:07,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:07,464 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. cyclomatic complexity: 11 Second operand 5 states. [2020-11-28 02:58:07,675 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-11-28 02:58:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:07,943 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2020-11-28 02:58:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:07,944 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 46 transitions. [2020-11-28 02:58:07,945 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-11-28 02:58:07,946 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 46 transitions. [2020-11-28 02:58:07,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-11-28 02:58:07,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-11-28 02:58:07,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 46 transitions. [2020-11-28 02:58:07,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:07,947 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 46 transitions. [2020-11-28 02:58:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 46 transitions. [2020-11-28 02:58:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-28 02:58:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 02:58:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2020-11-28 02:58:07,949 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2020-11-28 02:58:07,949 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2020-11-28 02:58:07,949 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 02:58:07,949 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 39 transitions. [2020-11-28 02:58:07,950 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2020-11-28 02:58:07,950 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:07,950 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:07,950 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:07,950 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:07,951 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$(0, 0, main_~root~0.base, 8 + main_~root~0.offset, 4); 181#L552-2 [2020-11-28 02:58:07,951 INFO L796 eck$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~mem7.base, main_#t~mem7.offset;havoc main_#t~short9;havoc main_#t~mem8.base, main_#t~mem8.offset; 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~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14; 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~mem19.base, main_#t~mem19.offset;havoc main_#t~nondet20; 181#L552-2 [2020-11-28 02:58:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:07,951 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2020-11-28 02:58:07,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:07,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430194998] [2020-11-28 02:58:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:07,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:07,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:07,995 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2020-11-28 02:58:07,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:07,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215372182] [2020-11-28 02:58:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:08,009 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:08,015 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:08,019 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2020-11-28 02:58:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:08,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092598913] [2020-11-28 02:58:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:08,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:08,053 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:08,067 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:08,268 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-11-28 02:58:08,930 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 103 [2020-11-28 02:58:08,992 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:09,158 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-28 02:58:09,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:09,167 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:09,309 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-28 02:58:09,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:09,311 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:09,312 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:216, output treesize:190 [2020-11-28 02:58:09,490 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-28 02:58:09,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:58:09 BoogieIcfgContainer [2020-11-28 02:58:09,559 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 02:58:09,560 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:09,560 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:09,560 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:09,561 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:06" (3/4) ... [2020-11-28 02:58:09,563 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-28 02:58:09,629 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_086216c5-5387-47cb-b2a2-86bc8da72549/bin/uautomizer/witness.graphml [2020-11-28 02:58:09,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:09,631 INFO L168 Benchmark]: Toolchain (without parser) took 4990.19 ms. Allocated memory was 121.6 MB in the beginning and 148.9 MB in the end (delta: 27.3 MB). Free memory was 92.6 MB in the beginning and 79.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,631 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory is still 45.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:09,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 544.30 ms. Allocated memory is still 121.6 MB. Free memory was 92.4 MB in the beginning and 85.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.17 ms. Allocated memory is still 121.6 MB. Free memory was 85.5 MB in the beginning and 83.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,634 INFO L168 Benchmark]: Boogie Preprocessor took 62.76 ms. Allocated memory is still 121.6 MB. Free memory was 83.4 MB in the beginning and 81.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,634 INFO L168 Benchmark]: RCFGBuilder took 801.93 ms. Allocated memory is still 121.6 MB. Free memory was 81.7 MB in the beginning and 89.0 MB in the end (delta: -7.3 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,635 INFO L168 Benchmark]: BuchiAutomizer took 3433.17 ms. Allocated memory was 121.6 MB in the beginning and 148.9 MB in the end (delta: 27.3 MB). Free memory was 88.4 MB in the beginning and 80.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 72.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,636 INFO L168 Benchmark]: Witness Printer took 69.67 ms. Allocated memory is still 148.9 MB. Free memory was 80.9 MB in the beginning and 79.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:09,640 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory is still 45.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 544.30 ms. Allocated memory is still 121.6 MB. Free memory was 92.4 MB in the beginning and 85.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.17 ms. Allocated memory is still 121.6 MB. Free memory was 85.5 MB in the beginning and 83.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.76 ms. Allocated memory is still 121.6 MB. Free memory was 83.4 MB in the beginning and 81.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 801.93 ms. Allocated memory is still 121.6 MB. Free memory was 81.7 MB in the beginning and 89.0 MB in the end (delta: -7.3 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3433.17 ms. Allocated memory was 121.6 MB in the beginning and 148.9 MB in the end (delta: 27.3 MB). Free memory was 88.4 MB in the beginning and 80.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 72.9 MB. Max. memory is 16.1 GB. * Witness Printer took 69.67 ms. Allocated memory is still 148.9 MB. Free memory was 80.9 MB in the beginning and 79.0 MB in the end (delta: 2.0 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 3.3s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.4s. Construction of modules took 0.4s. Büchi inclusion checks took 0.3s. 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@7ea87982=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ea97168=0, NULL=21281, NULL=21279, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3e6d89e5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@192d7066=0, root=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7a4096b9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e41f7ed=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7ea87982=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1a018a06=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@58726d66=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4c48d4ab=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@400e6d84=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@4e41f7ed=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@164cf191=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6141dfbc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@292f1f6e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6141dfbc=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@192d7066=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7a4096b9=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5bf3b94b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ed95ed3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2076533b=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@20f7839=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1f2c0fef=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@292f1f6e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@507a80fe=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5733326c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5bf3b94b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3e6d89e5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@a8e5cbf=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@416b333=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2076533b=0, n=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@416b333=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@742ef4d7=29, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ed95ed3=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6ea97168=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@58726d66=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1eeab4ea=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@646abc5e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1f2c0fef=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5733326c=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@7105bf67=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@a8e5cbf=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@646abc5e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@1eeab4ea=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@164cf191=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4c48d4ab=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e2fa23e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@37c87195=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@507a80fe=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@37c87195=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@27eb7bb7=0, NULL=21280, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e2fa23e=0, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@20f7839=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...