./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.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_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/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 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ................................................................................................................................................................................................................................................................................................................................................................................. 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 04:39:22,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 04:39:22,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 04:39:22,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 04:39:22,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 04:39:22,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 04:39:22,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 04:39:22,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 04:39:22,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 04:39:22,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 04:39:22,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 04:39:22,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 04:39:22,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 04:39:22,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 04:39:22,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 04:39:22,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 04:39:22,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 04:39:22,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 04:39:22,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 04:39:22,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 04:39:22,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 04:39:22,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 04:39:22,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 04:39:22,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 04:39:22,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 04:39:22,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 04:39:22,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 04:39:22,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 04:39:22,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 04:39:22,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 04:39:22,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 04:39:22,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 04:39:22,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 04:39:22,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 04:39:22,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 04:39:22,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 04:39:22,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 04:39:22,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 04:39:22,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 04:39:22,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 04:39:22,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 04:39:22,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-28 04:39:22,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 04:39:22,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 04:39:22,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 04:39:22,637 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-28 04:39:22,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 04:39:22,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 04:39:22,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 04:39:22,644 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 04:39:22,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 04:39:22,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 04:39:22,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 04:39:22,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 04:39:22,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 04:39:22,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 04:39:22,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 04:39:22,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 04:39:22,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 04:39:22,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 04:39:22,647 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-28 04:39:22,647 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-28 04:39:22,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 04:39:22,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 04:39:22,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:39:22,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 04:39:22,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 04:39:22,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 04:39:22,649 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-28 04:39:22,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 04:39:22,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 04:39:22,651 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_6df31b2b-959a-431b-82d8-65ff3f1a40f7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2020-11-28 04:39:22,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 04:39:22,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 04:39:22,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 04:39:22,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 04:39:22,950 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 04:39:22,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2020-11-28 04:39:23,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/data/433317389/2dd7251db2694f8b9ab6fadfb9ebb008/FLAGacf658f15 [2020-11-28 04:39:23,478 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 04:39:23,479 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/sv-benchmarks/c/verifythis/tree_del_rec.c [2020-11-28 04:39:23,486 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/data/433317389/2dd7251db2694f8b9ab6fadfb9ebb008/FLAGacf658f15 [2020-11-28 04:39:23,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/data/433317389/2dd7251db2694f8b9ab6fadfb9ebb008 [2020-11-28 04:39:23,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 04:39:23,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 04:39:23,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 04:39:23,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 04:39:23,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 04:39:23,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:23" (1/1) ... [2020-11-28 04:39:23,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d392028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:23, skipping insertion in model container [2020-11-28 04:39:23,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:23" (1/1) ... [2020-11-28 04:39:23,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 04:39:23,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 04:39:24,092 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-28 04:39:24,094 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-28 04:39:24,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:39:24,123 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 04:39:24,141 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-28 04:39:24,142 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-28 04:39:24,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:39:24,172 INFO L208 MainTranslator]: Completed translation [2020-11-28 04:39:24,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24 WrapperNode [2020-11-28 04:39:24,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 04:39:24,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 04:39:24,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 04:39:24,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 04:39:24,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 04:39:24,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 04:39:24,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 04:39:24,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 04:39:24,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... [2020-11-28 04:39:24,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 04:39:24,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 04:39:24,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 04:39:24,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 04:39:24,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/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 04:39:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 04:39:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 04:39:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-11-28 04:39:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-11-28 04:39:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 04:39:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-11-28 04:39:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-11-28 04:39:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 04:39:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-28 04:39:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-28 04:39:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 04:39:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-28 04:39:24,333 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-28 04:39:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 04:39:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 04:39:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-11-28 04:39:24,333 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-11-28 04:39:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 04:39:24,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 04:39:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-28 04:39:24,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-28 04:39:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-11-28 04:39:24,334 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-11-28 04:39:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 04:39:25,040 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 04:39:25,040 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 04:39:25,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:25 BoogieIcfgContainer [2020-11-28 04:39:25,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 04:39:25,044 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-28 04:39:25,044 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-28 04:39:25,056 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-28 04:39:25,057 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:25" (1/1) ... [2020-11-28 04:39:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 04:39:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 77 states and 100 transitions. [2020-11-28 04:39:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2020-11-28 04:39:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 04:39:25,142 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:25,493 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 04:39:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 81 states and 105 transitions. [2020-11-28 04:39:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2020-11-28 04:39:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 04:39:25,588 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:25,788 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 04:39:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 87 states and 116 transitions. [2020-11-28 04:39:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2020-11-28 04:39:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-28 04:39:26,236 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:26,581 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 04:39:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 89 states and 119 transitions. [2020-11-28 04:39:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2020-11-28 04:39:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-28 04:39:27,240 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:27,788 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 04:39:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 91 states and 124 transitions. [2020-11-28 04:39:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-11-28 04:39:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-28 04:39:29,530 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:29,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:29,643 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:29,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:29,925 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:30,075 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 5 iterations. [2020-11-28 04:39:30,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 28.11 04:39:30 ImpRootNode [2020-11-28 04:39:30,216 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-28 04:39:30,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 04:39:30,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 04:39:30,217 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 04:39:30,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:25" (3/4) ... [2020-11-28 04:39:30,219 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 04:39:30,384 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6df31b2b-959a-431b-82d8-65ff3f1a40f7/bin/ukojak/witness.graphml [2020-11-28 04:39:30,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 04:39:30,386 INFO L168 Benchmark]: Toolchain (without parser) took 6527.69 ms. Allocated memory was 109.1 MB in the beginning and 172.0 MB in the end (delta: 62.9 MB). Free memory was 78.5 MB in the beginning and 131.2 MB in the end (delta: -52.7 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,387 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 79.7 MB. Free memory is still 37.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:39:30,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.82 ms. Allocated memory is still 109.1 MB. Free memory was 78.5 MB in the beginning and 84.1 MB in the end (delta: -5.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.56 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 82.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,389 INFO L168 Benchmark]: Boogie Preprocessor took 38.15 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 80.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,389 INFO L168 Benchmark]: RCFGBuilder took 789.97 ms. Allocated memory is still 109.1 MB. Free memory was 80.5 MB in the beginning and 43.3 MB in the end (delta: 37.2 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,390 INFO L168 Benchmark]: CodeCheck took 5172.04 ms. Allocated memory was 109.1 MB in the beginning and 172.0 MB in the end (delta: 62.9 MB). Free memory was 43.3 MB in the beginning and 137.5 MB in the end (delta: -94.2 MB). Peak memory consumption was 57.4 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,391 INFO L168 Benchmark]: Witness Printer took 168.14 ms. Allocated memory is still 172.0 MB. Free memory was 137.5 MB in the beginning and 131.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:30,394 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, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 5, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 936 SDtfs, 154 SDslu, 170 SDs, 0 SdLazy, 910 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1658 GetRequests, 1576 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 23740 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: [L102] 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))={5599:0}, n={5599:0}, 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))={5599:0}, n={5599:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={5599:0}, malloc(sizeof(struct node))={5599:0}, n={5599:0}] [L102] RET nondet_tree() [L78] CALL, EXPR min(t) VAL [n={5599:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=4684, n={5599:0}, n={5599:0}, n->left={0:0}] [L41] 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}] [L41] RET, EXPR min(n->left) VAL [a=4684, min(n->left)=2147483647, n={5599:0}, n={5599:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=4684, b=2147483647, n={5599:0}, n={5599:0}, n->right={0:0}] [L42] 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}] [L42] RET, EXPR min(n->right) VAL [a=4684, b=2147483647, min(n->right)=2147483647, n={5599:0}, n={5599:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND FALSE !(b <= a && b <= c) [L44] COND FALSE !(c <= a && c <= b) [L45] return a; VAL [\result=4684, a=4684, b=2147483647, c=2147483647, n={5599:0}, n={5599:0}] [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) VAL [t={5599:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={5599:0}, t={5599:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={5599:0}, t={5599:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={5599:0}, t={5599:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={5599:0}, t={5599:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L9] COND FALSE !(!cond) [L83] EXPR, FCALL calloc(n, sizeof(int)) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-1:0}, t={5599:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={5599:0}, t={5599:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-1:0}, a={-1:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={5599:0}, t={5599:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={5599:0}, t={5599:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-1:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-1:0}, a={-1:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={5599:0}, t={5599:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-1:0}, a={-1:0}, i=2, t={5599:0}, t={5599:0}] [L84] RET tree_inorder(t, x, n) [L85] EXPR x[0] [L85] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 79.7 MB. Free memory is still 37.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.82 ms. Allocated memory is still 109.1 MB. Free memory was 78.5 MB in the beginning and 84.1 MB in the end (delta: -5.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.56 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 82.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.15 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 80.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 789.97 ms. Allocated memory is still 109.1 MB. Free memory was 80.5 MB in the beginning and 43.3 MB in the end (delta: 37.2 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * CodeCheck took 5172.04 ms. Allocated memory was 109.1 MB in the beginning and 172.0 MB in the end (delta: 62.9 MB). Free memory was 43.3 MB in the beginning and 137.5 MB in the end (delta: -94.2 MB). Peak memory consumption was 57.4 MB. Max. memory is 16.1 GB. * Witness Printer took 168.14 ms. Allocated memory is still 172.0 MB. Free memory was 137.5 MB in the beginning and 131.2 MB in the end (delta: 6.3 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...