./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1439388ab0e0331a25110b61c93eea2b0d4bab5 .............................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 16:26:05,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 16:26:05,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 16:26:05,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 16:26:05,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 16:26:05,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 16:26:05,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 16:26:05,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 16:26:05,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 16:26:05,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 16:26:05,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 16:26:05,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 16:26:05,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 16:26:05,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 16:26:05,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 16:26:05,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 16:26:05,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 16:26:05,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 16:26:05,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 16:26:05,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 16:26:05,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 16:26:05,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 16:26:05,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 16:26:05,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 16:26:05,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 16:26:05,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 16:26:05,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 16:26:05,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 16:26:05,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 16:26:05,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 16:26:05,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 16:26:05,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 16:26:05,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 16:26:05,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 16:26:05,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 16:26:05,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 16:26:05,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 16:26:05,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 16:26:05,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 16:26:05,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 16:26:05,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 16:26:05,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-12-01 16:26:05,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 16:26:05,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 16:26:05,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-01 16:26:05,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-12-01 16:26:05,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 16:26:05,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 16:26:05,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 16:26:05,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 16:26:05,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 16:26:05,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 16:26:05,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 16:26:05,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 16:26:05,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 16:26:05,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 16:26:05,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 16:26:05,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 16:26:05,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 16:26:05,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 16:26:05,901 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-12-01 16:26:05,902 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-12-01 16:26:05,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 16:26:05,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 16:26:05,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 16:26:05,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 16:26:05,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 16:26:05,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 16:26:05,903 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-12-01 16:26:05,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 16:26:05,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 16:26:05,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1439388ab0e0331a25110b61c93eea2b0d4bab5 [2020-12-01 16:26:06,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 16:26:06,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 16:26:06,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 16:26:06,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 16:26:06,238 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 16:26:06,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-12-01 16:26:06,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/data/6399c8007/8d29a8d896804db89db7b59398bd9dfe/FLAGf82f8a2d5 [2020-12-01 16:26:06,791 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 16:26:06,792 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-12-01 16:26:06,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/data/6399c8007/8d29a8d896804db89db7b59398bd9dfe/FLAGf82f8a2d5 [2020-12-01 16:26:07,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/data/6399c8007/8d29a8d896804db89db7b59398bd9dfe [2020-12-01 16:26:07,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 16:26:07,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 16:26:07,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 16:26:07,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 16:26:07,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 16:26:07,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3c66f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07, skipping insertion in model container [2020-12-01 16:26:07,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 16:26:07,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 16:26:07,357 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 16:26:07,359 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 16:26:07,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:26:07,387 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 16:26:07,409 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 16:26:07,410 WARN L1500 CHandler]: Possible shadowing of function min [2020-12-01 16:26:07,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:26:07,440 INFO L208 MainTranslator]: Completed translation [2020-12-01 16:26:07,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07 WrapperNode [2020-12-01 16:26:07,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 16:26:07,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 16:26:07,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 16:26:07,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 16:26:07,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 16:26:07,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 16:26:07,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 16:26:07,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 16:26:07,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... [2020-12-01 16:26:07,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 16:26:07,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 16:26:07,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 16:26:07,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 16:26:07,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:26:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 16:26:07,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-01 16:26:07,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 16:26:07,591 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-12-01 16:26:07,592 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-12-01 16:26:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 16:26:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-12-01 16:26:07,592 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-12-01 16:26:07,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 16:26:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-12-01 16:26:07,593 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-12-01 16:26:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-01 16:26:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-01 16:26:07,593 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-01 16:26:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 16:26:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-01 16:26:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-12-01 16:26:07,594 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-12-01 16:26:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 16:26:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 16:26:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-12-01 16:26:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-12-01 16:26:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-12-01 16:26:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-12-01 16:26:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 16:26:08,290 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 16:26:08,291 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-01 16:26:08,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:26:08 BoogieIcfgContainer [2020-12-01 16:26:08,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 16:26:08,294 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-12-01 16:26:08,294 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-12-01 16:26:08,313 INFO L275 PluginConnector]: CodeCheck initialized [2020-12-01 16:26:08,314 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:26:08" (1/1) ... [2020-12-01 16:26:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:26:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:26:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 74 states and 95 transitions. [2020-12-01 16:26:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-12-01 16:26:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-01 16:26:08,376 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:26:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:26:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:26:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:26:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 77 states and 100 transitions. [2020-12-01 16:26:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2020-12-01 16:26:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-01 16:26:08,646 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:26:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:26:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 16:26:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:26:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 83 states and 111 transitions. [2020-12-01 16:26:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-12-01 16:26:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-01 16:26:09,192 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:26:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:26:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-01 16:26:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:26:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 85 states and 114 transitions. [2020-12-01 16:26:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 114 transitions. [2020-12-01 16:26:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-01 16:26:09,818 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:26:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:26:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-01 16:26:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:26:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 87 states and 119 transitions. [2020-12-01 16:26:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-12-01 16:26:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-01 16:26:12,057 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:26:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:26:12,122 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:26:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:26:12,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:26:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:26:12,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:26:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:26:12,428 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:26:12,966 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 5 iterations. [2020-12-01 16:26:13,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 04:26:13 ImpRootNode [2020-12-01 16:26:13,106 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-12-01 16:26:13,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 16:26:13,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 16:26:13,108 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 16:26:13,108 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:26:08" (3/4) ... [2020-12-01 16:26:13,110 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 16:26:13,239 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5c72bf13-52fe-4cd0-9122-17c47ca417d1/bin/ukojak/witness.graphml [2020-12-01 16:26:13,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 16:26:13,241 INFO L168 Benchmark]: Toolchain (without parser) took 6080.28 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 57.5 MB in the beginning and 124.1 MB in the end (delta: -66.5 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,242 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 44.7 MB in the beginning and 44.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:26:13,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.61 ms. Allocated memory is still 88.1 MB. Free memory was 57.4 MB in the beginning and 63.5 MB in the end (delta: -6.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.07 ms. Allocated memory is still 88.1 MB. Free memory was 63.5 MB in the beginning and 61.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,246 INFO L168 Benchmark]: Boogie Preprocessor took 37.33 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 59.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,246 INFO L168 Benchmark]: RCFGBuilder took 774.96 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 59.8 MB in the beginning and 77.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,247 INFO L168 Benchmark]: CodeCheck took 4812.14 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 77.8 MB in the beginning and 129.3 MB in the end (delta: -51.5 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,247 INFO L168 Benchmark]: Witness Printer took 132.80 ms. Allocated memory is still 157.3 MB. Free memory was 129.3 MB in the beginning and 124.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-01 16:26:13,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 8 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 920 SDtfs, 144 SDslu, 162 SDs, 0 SdLazy, 872 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1606 GetRequests, 1528 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 274 NumberOfCodeBlocks, 274 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 22380 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 62/66 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L98] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={24773:0}, n={24773:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={24773:0}, n={24773:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={24773:0}, malloc(sizeof(struct node))={24773:0}, n={24773:0}] [L98] RET nondet_tree() [L76] CALL, EXPR min(t) VAL [n={24773:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={24773:0}, n={24773:0}, n->left={0:0}] [L40] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L40] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={24773:0}, n={24773:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={24773:0}, n={24773:0}, n->right={0:0}] [L41] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={24773:0}, n={24773:0}, n->right={0:0}] [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={24773:0}, n={24773:0}] [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) VAL [t={24773:0}] [L71] COND FALSE !(!t) [L72] EXPR t->left VAL [t={24773:0}, t={24773:0}, t->left={0:0}] [L72] CALL, EXPR size(t->left) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->left) VAL [size(t->left)=0, t={24773:0}, t={24773:0}, t->left={0:0}] [L72] EXPR t->right VAL [size(t->left)=0, t={24773:0}, t={24773:0}, t->left={0:0}, t->right={0:0}] [L72] CALL, EXPR size(t->right) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={24773:0}, t={24773:0}, t->left={0:0}, t->right={0:0}] [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L10] COND FALSE !(!cond) [L81] EXPR, FCALL calloc(n, sizeof(int)) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-1:0}, t={24773:0}] [L60] COND FALSE !(!t) [L63] EXPR t->left VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={24773:0}, t={24773:0}, t->left={0:0}] [L63] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=1, \result=1, a={-1:0}, a={-1:0}, i=1, t={0:0}, t={0:0}] [L63] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={24773:0}, t={24773:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={24773:0}, t={24773:0}, t->right={0:0}] [L65] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-1:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=2, \result=2, a={-1:0}, a={-1:0}, i=2, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={24773:0}, t={24773:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L65] i = tree_inorder(t->right, a, i) [L66] return i; VAL [\old(i)=1, \result=2, a={-1:0}, a={-1:0}, i=2, t={24773:0}, t={24773:0}] [L82] RET tree_inorder(t, x, n) [L83] EXPR x[0] [L83] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_rec_incorrect.c", 14, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 44.7 MB in the beginning and 44.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.61 ms. Allocated memory is still 88.1 MB. Free memory was 57.4 MB in the beginning and 63.5 MB in the end (delta: -6.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.07 ms. Allocated memory is still 88.1 MB. Free memory was 63.5 MB in the beginning and 61.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.33 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 59.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 774.96 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 59.8 MB in the beginning and 77.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. * CodeCheck took 4812.14 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 77.8 MB in the beginning and 129.3 MB in the end (delta: -51.5 MB). Peak memory consumption was 69.8 MB. Max. memory is 16.1 GB. * Witness Printer took 132.80 ms. Allocated memory is still 157.3 MB. Free memory was 129.3 MB in the beginning and 124.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...