./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ --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 4f9d3bc4199d475d16a98f98af89b165bc24fe0a085f06600e60f95805b0186f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 00:56:18,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 00:56:18,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 00:56:18,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 00:56:18,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 00:56:18,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 00:56:18,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 00:56:18,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 00:56:18,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 00:56:18,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 00:56:18,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 00:56:18,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 00:56:18,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 00:56:18,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 00:56:18,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 00:56:18,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 00:56:18,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 00:56:18,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 00:56:18,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 00:56:18,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 00:56:18,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 00:56:18,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 00:56:18,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 00:56:18,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 00:56:18,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 00:56:18,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 00:56:18,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 00:56:18,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 00:56:18,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 00:56:18,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 00:56:18,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 00:56:18,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 00:56:18,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 00:56:18,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 00:56:18,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 00:56:18,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 00:56:18,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 00:56:18,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 00:56:18,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 00:56:18,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 00:56:18,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 00:56:18,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/config/svcomp-Reach-32bit-Kojak_Default.epf [2021-11-23 00:56:18,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 00:56:18,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 00:56:19,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 00:56:19,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2021-11-23 00:56:19,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 00:56:19,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 00:56:19,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 00:56:19,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 00:56:19,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 00:56:19,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 00:56:19,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 00:56:19,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 00:56:19,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 00:56:19,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 00:56:19,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 00:56:19,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 00:56:19,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 00:56:19,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 00:56:19,006 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2021-11-23 00:56:19,006 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2021-11-23 00:56:19,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 00:56:19,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-11-23 00:56:19,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 00:56:19,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 00:56:19,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 00:56:19,007 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2021-11-23 00:56:19,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 00:56:19,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 00:56:19,008 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_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f9d3bc4199d475d16a98f98af89b165bc24fe0a085f06600e60f95805b0186f [2021-11-23 00:56:19,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 00:56:19,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 00:56:19,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 00:56:19,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 00:56:19,374 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 00:56:19,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-11-23 00:56:19,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/data/13efdefeb/5e2a2f35f30b488298db8eb9d0ff7af5/FLAGbbb0f0ace [2021-11-23 00:56:20,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 00:56:20,035 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2021-11-23 00:56:20,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/data/13efdefeb/5e2a2f35f30b488298db8eb9d0ff7af5/FLAGbbb0f0ace [2021-11-23 00:56:20,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/data/13efdefeb/5e2a2f35f30b488298db8eb9d0ff7af5 [2021-11-23 00:56:20,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 00:56:20,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 00:56:20,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 00:56:20,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 00:56:20,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 00:56:20,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b69ad61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20, skipping insertion in model container [2021-11-23 00:56:20,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 00:56:20,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 00:56:20,592 WARN L230 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_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2021-11-23 00:56:20,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 00:56:20,621 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 00:56:20,634 WARN L230 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_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2021-11-23 00:56:20,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 00:56:20,660 INFO L208 MainTranslator]: Completed translation [2021-11-23 00:56:20,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20 WrapperNode [2021-11-23 00:56:20,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 00:56:20,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 00:56:20,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 00:56:20,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 00:56:20,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,719 INFO L137 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2021-11-23 00:56:20,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 00:56:20,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 00:56:20,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 00:56:20,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 00:56:20,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 00:56:20,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 00:56:20,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 00:56:20,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 00:56:20,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:20" (1/1) ... [2021-11-23 00:56:20,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-11-23 00:56:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/z3 [2021-11-23 00:56:20,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2021-11-23 00:56:20,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2021-11-23 00:56:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 00:56:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 00:56:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-11-23 00:56:20,884 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-11-23 00:56:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-23 00:56:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-23 00:56:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 00:56:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-23 00:56:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-23 00:56:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 00:56:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 00:56:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 00:56:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 00:56:20,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 00:56:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 00:56:21,021 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 00:56:21,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 00:56:21,351 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 00:56:21,395 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 00:56:21,398 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 00:56:21,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:56:21 BoogieIcfgContainer [2021-11-23 00:56:21,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 00:56:21,403 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2021-11-23 00:56:21,404 INFO L271 PluginConnector]: Initializing CodeCheck... [2021-11-23 00:56:21,415 INFO L275 PluginConnector]: CodeCheck initialized [2021-11-23 00:56:21,416 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:56:21" (1/1) ... [2021-11-23 00:56:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 00:56:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-23 00:56:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 36 states and 46 transitions. [2021-11-23 00:56:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-23 00:56:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 00:56:21,536 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-23 00:56:21,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 00:56:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 00:56:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 00:56:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-23 00:56:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 44 states and 59 transitions. [2021-11-23 00:56:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-11-23 00:56:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 00:56:22,088 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-23 00:56:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 00:56:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 00:56:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 00:56:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-23 00:56:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 46 states and 62 transitions. [2021-11-23 00:56:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-11-23 00:56:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 00:56:22,739 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-23 00:56:22,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 00:56:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 00:56:22,816 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 00:56:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 00:56:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 00:56:22,950 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 00:56:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 00:56:23,010 WARN L475 CodeCheckObserver]: This program is UNSAFE, Check terminated with 3 iterations. [2021-11-23 00:56:23,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 23.11 12:56:23 ImpRootNode [2021-11-23 00:56:23,056 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2021-11-23 00:56:23,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 00:56:23,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 00:56:23,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 00:56:23,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:56:21" (3/4) ... [2021-11-23 00:56:23,063 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 00:56:23,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/witness.graphml [2021-11-23 00:56:23,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 00:56:23,143 INFO L158 Benchmark]: Toolchain (without parser) took 2742.79ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 50.4MB in the beginning and 54.2MB in the end (delta: -3.7MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2021-11-23 00:56:23,143 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 00:56:23,144 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.86ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 50.3MB in the beginning and 87.6MB in the end (delta: -37.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 00:56:23,150 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.46ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 86.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 00:56:23,151 INFO L158 Benchmark]: Boogie Preprocessor took 50.28ms. Allocated memory is still 113.2MB. Free memory was 86.0MB in the beginning and 84.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 00:56:23,151 INFO L158 Benchmark]: RCFGBuilder took 630.57ms. Allocated memory is still 113.2MB. Free memory was 84.7MB in the beginning and 72.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 00:56:23,152 INFO L158 Benchmark]: CodeCheck took 1653.65ms. Allocated memory is still 113.2MB. Free memory was 72.4MB in the beginning and 57.1MB in the end (delta: 15.3MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2021-11-23 00:56:23,152 INFO L158 Benchmark]: Witness Printer took 84.83ms. Allocated memory is still 113.2MB. Free memory was 57.1MB in the beginning and 54.2MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 00:56:23,154 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 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 97 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 100 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 102 IncrementalHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 86 mSDtfsCounter, 102 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 9/9 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: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L60] CALL, EXPR nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L25] RET, EXPR nondet_tree() VAL [n={-1:0}, nondet_tree()={0:0}] [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L26] RET, EXPR nondet_tree() VAL [n={-1:0}, nondet_tree()={0:0}] [L26] n->right = nondet_tree() [L27] return n; VAL [\result={-1:0}, n={-1:0}] [L60] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L60] CALL task(nondet_tree()) [L55] CALL, EXPR max(n) VAL [n={-1:0}] [L32] COND FALSE !(!n) [L35] EXPR n->left VAL [n={-1:0}, n={-1:0}, n->left={0:0}] [L35] CALL, EXPR max(n->left) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L35] RET, EXPR max(n->left) VAL [max(n->left)=-2147483648, n={-1:0}, n={-1:0}, n->left={0:0}] [L35] int a = max(n->left); [L36] EXPR n->right VAL [a=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L36] CALL, EXPR max(n->right) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L36] RET, EXPR max(n->right) VAL [a=-2147483648, max(n->right)=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; VAL [\result=-2147483648, a=-2147483648, b=-2147483648, n={-1:0}, n={-1:0}] [L55] RET, EXPR max(n) VAL [max(n)=-2147483648, n={-1:0}, n={-1:0}] [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] EXPR n->data [L44] CALL __VERIFIER_assert(n->data <= a) [L11] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L11] reach_error() VAL [\old(cond)=0, cond=0] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.86ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 50.3MB in the beginning and 87.6MB in the end (delta: -37.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.46ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 86.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.28ms. Allocated memory is still 113.2MB. Free memory was 86.0MB in the beginning and 84.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 630.57ms. Allocated memory is still 113.2MB. Free memory was 84.7MB in the beginning and 72.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * CodeCheck took 1653.65ms. Allocated memory is still 113.2MB. Free memory was 72.4MB in the beginning and 57.1MB in the end (delta: 15.3MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * Witness Printer took 84.83ms. Allocated memory is still 113.2MB. Free memory was 57.1MB in the beginning and 54.2MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. RESULT: Ultimate proved your program to be incorrect! [2021-11-23 00:56:23,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916a8ce7-b8a9-4e3e-a86a-26aefd4a59ed/bin/ukojak-LBtLqBUTdQ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE