./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI --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 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 ................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-b2eff8b [2021-10-29 02:54:13,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 02:54:13,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 02:54:13,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 02:54:13,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 02:54:13,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 02:54:13,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 02:54:13,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 02:54:13,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 02:54:13,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 02:54:13,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 02:54:13,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 02:54:13,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 02:54:13,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 02:54:13,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 02:54:13,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 02:54:13,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 02:54:13,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 02:54:13,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 02:54:13,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 02:54:13,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 02:54:13,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 02:54:13,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 02:54:13,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 02:54:13,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 02:54:13,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 02:54:13,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 02:54:13,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 02:54:13,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 02:54:13,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 02:54:13,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 02:54:13,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 02:54:13,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 02:54:13,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 02:54:13,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 02:54:13,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 02:54:13,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 02:54:13,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 02:54:13,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 02:54:13,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 02:54:13,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 02:54:13,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/config/svcomp-Reach-32bit-Kojak_Default.epf [2021-10-29 02:54:13,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 02:54:13,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 02:54:13,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 02:54:13,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2021-10-29 02:54:13,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 02:54:13,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 02:54:13,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 02:54:13,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 02:54:13,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 02:54:13,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 02:54:13,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 02:54:13,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 02:54:13,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 02:54:13,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 02:54:13,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 02:54:13,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 02:54:13,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 02:54:13,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 02:54:13,887 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2021-10-29 02:54:13,887 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2021-10-29 02:54:13,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 02:54:13,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-10-29 02:54:13,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 02:54:13,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 02:54:13,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 02:54:13,889 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2021-10-29 02:54:13,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 02:54:13,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 02:54:13,890 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_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 [2021-10-29 02:54:14,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 02:54:14,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 02:54:14,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 02:54:14,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 02:54:14,181 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 02:54:14,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-29 02:54:14,251 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/data/eeb262e0c/6ecc9dc7aa2a4962a0899596ebad97de/FLAG00f4cac36 [2021-10-29 02:54:14,825 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 02:54:14,826 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-29 02:54:14,839 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/data/eeb262e0c/6ecc9dc7aa2a4962a0899596ebad97de/FLAG00f4cac36 [2021-10-29 02:54:15,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/data/eeb262e0c/6ecc9dc7aa2a4962a0899596ebad97de [2021-10-29 02:54:15,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 02:54:15,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 02:54:15,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 02:54:15,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 02:54:15,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 02:54:15,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4dc607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15, skipping insertion in model container [2021-10-29 02:54:15,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 02:54:15,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 02:54:15,389 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-29 02:54:15,408 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 02:54:15,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 02:54:15,437 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 02:54:15,461 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-29 02:54:15,470 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 02:54:15,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 02:54:15,517 INFO L208 MainTranslator]: Completed translation [2021-10-29 02:54:15,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15 WrapperNode [2021-10-29 02:54:15,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 02:54:15,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 02:54:15,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 02:54:15,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 02:54:15,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 02:54:15,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 02:54:15,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 02:54:15,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 02:54:15,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 02:54:15,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 02:54:15,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 02:54:15,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 02:54:15,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:54:15" (1/1) ... [2021-10-29 02:54:15,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-10-29 02:54:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/z3 [2021-10-29 02:54:15,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2021-10-29 02:54:15,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2021-10-29 02:54:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 02:54:15,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 02:54:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 02:54:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-29 02:54:15,766 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-29 02:54:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 02:54:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-29 02:54:15,767 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-29 02:54:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 02:54:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-29 02:54:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-29 02:54:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 02:54:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 02:54:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-29 02:54:15,769 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-29 02:54:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 02:54:15,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 02:54:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-29 02:54:15,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-29 02:54:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-29 02:54:15,771 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-29 02:54:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 02:54:16,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 02:54:16,456 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-29 02:54:16,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:54:16 BoogieIcfgContainer [2021-10-29 02:54:16,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 02:54:16,461 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2021-10-29 02:54:16,461 INFO L271 PluginConnector]: Initializing CodeCheck... [2021-10-29 02:54:16,473 INFO L275 PluginConnector]: CodeCheck initialized [2021-10-29 02:54:16,473 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:54:16" (1/1) ... [2021-10-29 02:54:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 02:54:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 02:54:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 69 states and 90 transitions. [2021-10-29 02:54:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2021-10-29 02:54:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 02:54:16,547 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 02:54:16,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 02:54:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 02:54:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 02:54:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 02:54:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 72 states and 95 transitions. [2021-10-29 02:54:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2021-10-29 02:54:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 02:54:16,883 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 02:54:16,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 02:54:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 02:54:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 02:54:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 02:54:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 78 states and 106 transitions. [2021-10-29 02:54:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2021-10-29 02:54:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-29 02:54:17,492 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 02:54:17,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 02:54:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 02:54:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-29 02:54:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 02:54:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 80 states and 109 transitions. [2021-10-29 02:54:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2021-10-29 02:54:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-29 02:54:18,211 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 02:54:18,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 02:54:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 02:54:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-29 02:54:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 02:54:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 82 states and 114 transitions. [2021-10-29 02:54:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2021-10-29 02:54:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-29 02:54:20,021 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 02:54:20,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 02:54:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 02:54:20,092 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 02:54:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 02:54:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 02:54:20,316 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 02:54:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 02:54:20,467 WARN L480 CodeCheckObserver]: This program is UNSAFE, Check terminated with 5 iterations. [2021-10-29 02:54:20,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 29.10 02:54:20 ImpRootNode [2021-10-29 02:54:20,558 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2021-10-29 02:54:20,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 02:54:20,559 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 02:54:20,559 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 02:54:20,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:54:16" (3/4) ... [2021-10-29 02:54:20,561 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 02:54:20,742 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/witness.graphml [2021-10-29 02:54:20,743 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 02:54:20,744 INFO L168 Benchmark]: Toolchain (without parser) took 5594.27 ms. Allocated memory was 92.3 MB in the beginning and 148.9 MB in the end (delta: 56.6 MB). Free memory was 52.0 MB in the beginning and 66.9 MB in the end (delta: -14.9 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,745 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 02:54:20,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.03 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 65.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.31 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 63.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,755 INFO L168 Benchmark]: Boogie Preprocessor took 75.26 ms. Allocated memory is still 92.3 MB. Free memory was 63.2 MB in the beginning and 61.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,757 INFO L168 Benchmark]: RCFGBuilder took 789.06 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 61.3 MB in the beginning and 93.3 MB in the end (delta: -32.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,758 INFO L168 Benchmark]: CodeCheck took 4097.75 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 93.3 MB in the beginning and 72.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,759 INFO L168 Benchmark]: Witness Printer took 184.08 ms. Allocated memory is still 148.9 MB. Free memory was 72.2 MB in the beginning and 66.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 02:54:20,761 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. OverallTime: 3.9s, OverallIterations: 5, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 904 SDtfs, 136 SDslu, 146 SDs, 0 SdLazy, 912 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1612 GetRequests, 1532 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 274 NumberOfCodeBlocks, 274 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 436 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: 16]: a call to reach_error is reachable a call to reach_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 [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 [n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-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={11575:0}, t={-1:0}] [L67] COND FALSE !(!t) [L70] EXPR t->left VAL [\old(i)=1, a={11575:0}, a={11575:0}, 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={11575:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={11575:0}, a={11575:0}, i=1, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={11575:0}, a={11575:0}, 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={11575:0}, a={11575:0}, 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={11575:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={11575:0}, a={11575:0}, i=2, t={0:0}, t={0:0}] [L72] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={11575:0}, a={11575:0}, 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={11575:0}, a={11575:0}, 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]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 368.03 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 65.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.31 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 63.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.26 ms. Allocated memory is still 92.3 MB. Free memory was 63.2 MB in the beginning and 61.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 789.06 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 61.3 MB in the beginning and 93.3 MB in the end (delta: -32.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. * CodeCheck took 4097.75 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 93.3 MB in the beginning and 72.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. * Witness Printer took 184.08 ms. Allocated memory is still 148.9 MB. Free memory was 72.2 MB in the beginning and 66.9 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! [2021-10-29 02:54:20,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43090b21-a690-433b-ae61-f3fd8f229a28/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...