./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i --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_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/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_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/config/KojakReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/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_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/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 e99503bfcf6201b20e9e96de963aa687998a61153cfad44b7458729e6b441ff2 ................................................................................................................................................................................................................................................................... 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 03:28:57,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 03:28:57,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 03:28:57,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 03:28:57,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 03:28:57,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 03:28:57,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 03:28:57,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 03:28:57,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 03:28:57,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 03:28:57,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 03:28:57,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 03:28:57,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 03:28:57,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 03:28:57,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 03:28:57,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 03:28:57,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 03:28:57,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 03:28:57,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 03:28:57,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 03:28:57,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 03:28:57,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 03:28:57,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 03:28:57,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 03:28:57,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 03:28:57,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 03:28:57,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 03:28:57,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 03:28:57,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 03:28:57,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 03:28:57,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 03:28:57,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 03:28:57,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 03:28:57,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 03:28:57,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 03:28:57,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 03:28:57,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 03:28:57,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 03:28:57,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 03:28:57,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 03:28:57,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 03:28:57,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/config/svcomp-Reach-32bit-Kojak_Default.epf [2021-10-29 03:28:57,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 03:28:57,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 03:28:57,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 03:28:57,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2021-10-29 03:28:57,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 03:28:57,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 03:28:57,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 03:28:57,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 03:28:57,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 03:28:57,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 03:28:57,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 03:28:57,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 03:28:57,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 03:28:57,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 03:28:57,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 03:28:57,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 03:28:57,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 03:28:57,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 03:28:57,618 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2021-10-29 03:28:57,618 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2021-10-29 03:28:57,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 03:28:57,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-10-29 03:28:57,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 03:28:57,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 03:28:57,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 03:28:57,620 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2021-10-29 03:28:57,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 03:28:57,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 03:28:57,621 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_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e99503bfcf6201b20e9e96de963aa687998a61153cfad44b7458729e6b441ff2 [2021-10-29 03:28:57,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 03:28:57,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 03:28:57,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 03:28:57,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 03:28:57,971 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 03:28:57,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-10-29 03:28:58,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/data/e7b82f948/3dd01b88ff4748b6a1e104c8228cb156/FLAG70a3213e0 [2021-10-29 03:28:58,760 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 03:28:58,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-10-29 03:28:58,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/data/e7b82f948/3dd01b88ff4748b6a1e104c8228cb156/FLAG70a3213e0 [2021-10-29 03:28:58,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/data/e7b82f948/3dd01b88ff4748b6a1e104c8228cb156 [2021-10-29 03:28:58,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 03:28:58,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 03:28:58,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 03:28:58,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 03:28:58,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 03:28:58,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:28:58" (1/1) ... [2021-10-29 03:28:58,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a11c617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:58, skipping insertion in model container [2021-10-29 03:28:58,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:28:58" (1/1) ... [2021-10-29 03:28:58,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 03:28:59,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 03:28:59,387 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_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-10-29 03:28:59,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 03:28:59,411 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 03:28:59,480 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_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-10-29 03:28:59,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 03:28:59,528 INFO L208 MainTranslator]: Completed translation [2021-10-29 03:28:59,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59 WrapperNode [2021-10-29 03:28:59,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 03:28:59,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 03:28:59,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 03:28:59,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 03:28:59,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 03:28:59,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 03:28:59,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 03:28:59,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 03:28:59,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 03:28:59,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 03:28:59,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 03:28:59,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 03:28:59,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:28:59" (1/1) ... [2021-10-29 03:28:59,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-10-29 03:28:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/z3 [2021-10-29 03:28:59,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2021-10-29 03:28:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2021-10-29 03:28:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-29 03:28:59,757 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-29 03:28:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 03:28:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 03:28:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 03:28:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 03:28:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 03:28:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 03:28:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 03:28:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 03:28:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 03:28:59,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 03:28:59,947 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-29 03:29:00,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 03:29:00,631 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-29 03:29:00,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:29:00 BoogieIcfgContainer [2021-10-29 03:29:00,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 03:29:00,635 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2021-10-29 03:29:00,636 INFO L271 PluginConnector]: Initializing CodeCheck... [2021-10-29 03:29:00,647 INFO L275 PluginConnector]: CodeCheck initialized [2021-10-29 03:29:00,647 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:29:00" (1/1) ... [2021-10-29 03:29:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 03:29:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:29:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 30 states and 43 transitions. [2021-10-29 03:29:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2021-10-29 03:29:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 03:29:00,698 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:29:00,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:29:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 03:29:00,868 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 03:29:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:29:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 30 states and 41 transitions. [2021-10-29 03:29:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2021-10-29 03:29:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 03:29:00,879 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:29:00,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:29:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 03:29:01,038 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 03:29:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:29:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 35 states and 50 transitions. [2021-10-29 03:29:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2021-10-29 03:29:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 03:29:01,188 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:29:01,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:29:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 03:29:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 03:29:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:29:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 42 states and 65 transitions. [2021-10-29 03:29:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 65 transitions. [2021-10-29 03:29:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-29 03:29:02,136 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:29:02,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:29:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:29:02,195 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 03:29:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:29:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:29:02,339 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 03:29:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:29:02,396 WARN L480 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2021-10-29 03:29:02,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 29.10 03:29:02 ImpRootNode [2021-10-29 03:29:02,452 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2021-10-29 03:29:02,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 03:29:02,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 03:29:02,453 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 03:29:02,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:29:00" (3/4) ... [2021-10-29 03:29:02,456 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 03:29:02,506 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/witness.graphml [2021-10-29 03:29:02,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 03:29:02,509 INFO L168 Benchmark]: Toolchain (without parser) took 3548.19 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 84.0 MB in the beginning and 123.7 MB in the end (delta: -39.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 03:29:02,510 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 123.7 MB. Free memory is still 102.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 03:29:02,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 564.46 ms. Allocated memory is still 123.7 MB. Free memory was 83.9 MB in the beginning and 89.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 03:29:02,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.11 ms. Allocated memory is still 123.7 MB. Free memory was 89.2 MB in the beginning and 86.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 03:29:02,512 INFO L168 Benchmark]: Boogie Preprocessor took 67.94 ms. Allocated memory is still 123.7 MB. Free memory was 86.8 MB in the beginning and 84.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 03:29:02,513 INFO L168 Benchmark]: RCFGBuilder took 970.78 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 55.9 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-29 03:29:02,514 INFO L168 Benchmark]: CodeCheck took 1816.66 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 55.9 MB in the beginning and 125.8 MB in the end (delta: -69.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2021-10-29 03:29:02,515 INFO L168 Benchmark]: Witness Printer took 54.30 ms. Allocated memory is still 153.1 MB. Free memory was 125.8 MB in the beginning and 123.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 03:29:02,519 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 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 36 SDslu, 32 SDs, 0 SdLazy, 170 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 152 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 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: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] a->h = 2 [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) [L604] COND FALSE !(t == 0) [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a [L611] COND TRUE p!=0 [L612] EXPR p->h [L612] COND TRUE p->h != 2 [L613] reach_error() * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 123.7 MB. Free memory is still 102.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 564.46 ms. Allocated memory is still 123.7 MB. Free memory was 83.9 MB in the beginning and 89.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.11 ms. Allocated memory is still 123.7 MB. Free memory was 89.2 MB in the beginning and 86.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.94 ms. Allocated memory is still 123.7 MB. Free memory was 86.8 MB in the beginning and 84.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 970.78 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 55.9 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * CodeCheck took 1816.66 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 55.9 MB in the beginning and 125.8 MB in the end (delta: -69.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. * Witness Printer took 54.30 ms. Allocated memory is still 153.1 MB. Free memory was 125.8 MB in the beginning and 123.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! [2021-10-29 03:29:02,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc8b4f7-86c9-4faa-b9cc-bd8c1659ac80/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...