./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/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 74289de26b6d11ce9d727281c5976611ee27d2e8 .......................................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-28 04:43:20,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 04:43:20,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 04:43:20,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 04:43:20,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 04:43:20,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 04:43:20,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 04:43:20,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 04:43:20,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 04:43:20,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 04:43:20,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 04:43:20,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 04:43:20,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 04:43:20,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 04:43:20,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 04:43:20,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 04:43:20,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 04:43:20,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 04:43:20,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 04:43:20,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 04:43:20,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 04:43:20,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 04:43:20,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 04:43:20,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 04:43:20,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 04:43:20,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 04:43:20,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 04:43:20,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 04:43:20,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 04:43:20,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 04:43:20,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 04:43:20,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 04:43:20,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 04:43:20,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 04:43:20,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 04:43:20,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 04:43:20,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 04:43:20,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 04:43:20,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 04:43:20,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 04:43:20,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 04:43:20,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-28 04:43:20,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 04:43:20,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 04:43:20,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 04:43:20,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-28 04:43:20,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 04:43:20,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 04:43:20,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 04:43:20,718 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 04:43:20,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 04:43:20,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 04:43:20,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 04:43:20,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 04:43:20,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 04:43:20,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 04:43:20,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 04:43:20,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 04:43:20,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 04:43:20,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 04:43:20,721 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-28 04:43:20,721 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-28 04:43:20,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 04:43:20,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 04:43:20,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:43:20,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 04:43:20,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 04:43:20,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 04:43:20,722 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-28 04:43:20,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 04:43:20,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 04:43:20,723 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_5e2eda5e-599b-4725-837e-6fb79d540d35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2020-11-28 04:43:20,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 04:43:20,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 04:43:20,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 04:43:20,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 04:43:20,990 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 04:43:20,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-11-28 04:43:21,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/data/8617d75f7/d3f6c628c0494aba82949a1445f31c38/FLAG17896d2c5 [2020-11-28 04:43:21,598 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 04:43:21,599 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-11-28 04:43:21,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/data/8617d75f7/d3f6c628c0494aba82949a1445f31c38/FLAG17896d2c5 [2020-11-28 04:43:21,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/data/8617d75f7/d3f6c628c0494aba82949a1445f31c38 [2020-11-28 04:43:21,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 04:43:21,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 04:43:21,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 04:43:21,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 04:43:21,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 04:43:21,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:43:21" (1/1) ... [2020-11-28 04:43:21,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4938a96f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:21, skipping insertion in model container [2020-11-28 04:43:21,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:43:21" (1/1) ... [2020-11-28 04:43:21,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 04:43:21,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 04:43:22,190 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-28 04:43:22,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:43:22,220 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 04:43:22,242 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-28 04:43:22,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:43:22,272 INFO L208 MainTranslator]: Completed translation [2020-11-28 04:43:22,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22 WrapperNode [2020-11-28 04:43:22,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 04:43:22,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 04:43:22,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 04:43:22,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 04:43:22,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 04:43:22,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 04:43:22,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 04:43:22,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 04:43:22,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... [2020-11-28 04:43:22,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 04:43:22,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 04:43:22,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 04:43:22,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 04:43:22,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:43:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/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 [2020-11-28 04:43:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 04:43:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 04:43:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 04:43:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-11-28 04:43:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-11-28 04:43:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 04:43:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-28 04:43:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-28 04:43:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 04:43:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-28 04:43:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-28 04:43:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 04:43:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 04:43:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-11-28 04:43:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-11-28 04:43:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 04:43:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 04:43:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-28 04:43:22,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-28 04:43:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-11-28 04:43:22,488 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-11-28 04:43:22,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 04:43:23,305 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 04:43:23,305 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-28 04:43:23,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:43:23 BoogieIcfgContainer [2020-11-28 04:43:23,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 04:43:23,308 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-28 04:43:23,308 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-28 04:43:23,319 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-28 04:43:23,319 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:43:23" (1/1) ... [2020-11-28 04:43:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 04:43:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 69 states and 90 transitions. [2020-11-28 04:43:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2020-11-28 04:43:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 04:43:23,396 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:43:23,672 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 04:43:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 72 states and 95 transitions. [2020-11-28 04:43:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2020-11-28 04:43:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 04:43:23,759 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:43:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 04:43:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 78 states and 106 transitions. [2020-11-28 04:43:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2020-11-28 04:43:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-28 04:43:24,380 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:43:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 04:43:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 80 states and 109 transitions. [2020-11-28 04:43:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2020-11-28 04:43:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-28 04:43:25,239 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:43:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 04:43:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 82 states and 114 transitions. [2020-11-28 04:43:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2020-11-28 04:43:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 04:43:27,140 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:27,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:27,289 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:27,545 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:27,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:27,692 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 5 iterations. [2020-11-28 04:43:27,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 28.11 04:43:27 ImpRootNode [2020-11-28 04:43:27,827 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-28 04:43:27,828 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 04:43:27,828 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 04:43:27,828 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 04:43:27,829 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:43:23" (3/4) ... [2020-11-28 04:43:27,830 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 04:43:27,951 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5e2eda5e-599b-4725-837e-6fb79d540d35/bin/ukojak/witness.graphml [2020-11-28 04:43:27,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 04:43:27,954 INFO L168 Benchmark]: Toolchain (without parser) took 6003.90 ms. Allocated memory was 92.3 MB in the beginning and 161.5 MB in the end (delta: 69.2 MB). Free memory was 63.2 MB in the beginning and 48.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 83.6 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,955 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 49.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:43:27,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.18 ms. Allocated memory is still 92.3 MB. Free memory was 63.0 MB in the beginning and 67.3 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,956 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.65 ms. Allocated memory is still 92.3 MB. Free memory was 67.3 MB in the beginning and 65.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,962 INFO L168 Benchmark]: Boogie Preprocessor took 61.63 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 63.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,964 INFO L168 Benchmark]: RCFGBuilder took 893.70 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 63.4 MB in the beginning and 65.2 MB in the end (delta: -1.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,966 INFO L168 Benchmark]: CodeCheck took 4519.21 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 65.2 MB in the beginning and 53.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 65.7 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,967 INFO L168 Benchmark]: Witness Printer took 124.10 ms. Allocated memory is still 161.5 MB. Free memory was 53.3 MB in the beginning and 48.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:27,970 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 7 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 5, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 924 SDtfs, 146 SDslu, 166 SDs, 0 SdLazy, 862 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1605 GetRequests, 1529 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 274 NumberOfCodeBlocks, 274 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 22032 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: [L105] 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))={-1:0}, n={-1:0}, 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))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L105] RET nondet_tree() [L83] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={-1:0}, n={-1:0}, 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={-1:0}, n={-1:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={-1:0}, n={-1:0}, 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={-1:0}, n={-1:0}, 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={-1:0}, n={-1:0}] [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) VAL [t={-1:0}] [L78] COND FALSE !(!t) [L79] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L79] CALL, EXPR size(t->left) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L79] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L79] CALL, EXPR size(t->right) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L10] COND FALSE !(!cond) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={26051:0}, t={-1:0}] [L67] COND FALSE !(!t) [L70] EXPR t->left VAL [\old(i)=1, a={26051:0}, a={26051:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L70] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={26051:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={26051:0}, a={26051:0}, i=1, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={26051:0}, a={26051:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right VAL [\old(i)=1, a={26051:0}, a={26051:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L72] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={26051:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={26051:0}, a={26051:0}, i=2, t={0:0}, t={0:0}] [L72] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={26051:0}, a={26051:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L72] i = tree_inorder(t->right, a, i) [L73] return i; VAL [\old(i)=1, \result=2, a={26051:0}, a={26051:0}, i=2, t={-1:0}, t={-1:0}] [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_iter_incorrect.c", 14, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 49.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.18 ms. Allocated memory is still 92.3 MB. Free memory was 63.0 MB in the beginning and 67.3 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.65 ms. Allocated memory is still 92.3 MB. Free memory was 67.3 MB in the beginning and 65.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.63 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 63.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 893.70 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 63.4 MB in the beginning and 65.2 MB in the end (delta: -1.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * CodeCheck took 4519.21 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 65.2 MB in the beginning and 53.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 65.7 MB. Max. memory is 16.1 GB. * Witness Printer took 124.10 ms. Allocated memory is still 161.5 MB. Free memory was 53.3 MB in the beginning and 48.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...