./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-2.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_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/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_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/config/KojakReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/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_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/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 f533383f211897ea0c402e211f6c19321d99a2ee7c27b850c3f29a2cf1ec1863 ........................................................................................................................................................................................................................................................................ 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 03:37:10,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 03:37:10,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 03:37:10,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 03:37:10,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 03:37:10,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 03:37:10,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 03:37:10,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 03:37:10,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 03:37:10,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 03:37:10,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 03:37:10,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 03:37:10,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 03:37:10,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 03:37:10,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 03:37:10,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 03:37:10,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 03:37:10,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 03:37:10,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 03:37:10,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 03:37:10,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 03:37:10,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 03:37:10,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 03:37:10,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 03:37:10,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 03:37:10,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 03:37:10,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 03:37:10,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 03:37:10,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 03:37:10,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 03:37:10,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 03:37:10,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 03:37:10,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 03:37:10,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 03:37:10,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 03:37:10,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 03:37:10,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 03:37:10,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 03:37:10,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 03:37:10,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 03:37:10,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 03:37:10,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/config/svcomp-Reach-32bit-Kojak_Default.epf [2021-10-29 03:37:10,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 03:37:10,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 03:37:10,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 03:37:10,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2021-10-29 03:37:10,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 03:37:10,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 03:37:10,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 03:37:10,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 03:37:10,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 03:37:10,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 03:37:10,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 03:37:10,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 03:37:10,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 03:37:10,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 03:37:10,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 03:37:10,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 03:37:10,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 03:37:10,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 03:37:10,774 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2021-10-29 03:37:10,774 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2021-10-29 03:37:10,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 03:37:10,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-10-29 03:37:10,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 03:37:10,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 03:37:10,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 03:37:10,776 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2021-10-29 03:37:10,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 03:37:10,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 03:37:10,776 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_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f533383f211897ea0c402e211f6c19321d99a2ee7c27b850c3f29a2cf1ec1863 [2021-10-29 03:37:11,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 03:37:11,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 03:37:11,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 03:37:11,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 03:37:11,158 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 03:37:11,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/../../sv-benchmarks/c/list-properties/alternating_list-2.i [2021-10-29 03:37:11,233 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/data/a7f19a04b/918806ac7c8a47b9a23c221b92357723/FLAG984e51ca1 [2021-10-29 03:37:11,858 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 03:37:11,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/sv-benchmarks/c/list-properties/alternating_list-2.i [2021-10-29 03:37:11,887 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/data/a7f19a04b/918806ac7c8a47b9a23c221b92357723/FLAG984e51ca1 [2021-10-29 03:37:12,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/data/a7f19a04b/918806ac7c8a47b9a23c221b92357723 [2021-10-29 03:37:12,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 03:37:12,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 03:37:12,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 03:37:12,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 03:37:12,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 03:37:12,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6854df45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12, skipping insertion in model container [2021-10-29 03:37:12,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 03:37:12,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 03:37:12,524 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_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/sv-benchmarks/c/list-properties/alternating_list-2.i[23574,23587] [2021-10-29 03:37:12,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 03:37:12,544 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 03:37:12,609 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_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/sv-benchmarks/c/list-properties/alternating_list-2.i[23574,23587] [2021-10-29 03:37:12,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 03:37:12,640 INFO L208 MainTranslator]: Completed translation [2021-10-29 03:37:12,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12 WrapperNode [2021-10-29 03:37:12,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 03:37:12,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 03:37:12,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 03:37:12,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 03:37:12,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 03:37:12,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 03:37:12,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 03:37:12,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 03:37:12,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 03:37:12,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 03:37:12,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 03:37:12,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 03:37:12,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:37:12" (1/1) ... [2021-10-29 03:37:12,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-10-29 03:37:12,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/z3 [2021-10-29 03:37:12,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2021-10-29 03:37:12,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2021-10-29 03:37:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-29 03:37:12,845 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-29 03:37:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 03:37:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 03:37:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 03:37:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 03:37:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 03:37:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 03:37:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 03:37:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 03:37:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 03:37:12,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 03:37:13,034 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-29 03:37:13,340 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 03:37:13,341 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-29 03:37:13,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:37:13 BoogieIcfgContainer [2021-10-29 03:37:13,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 03:37:13,344 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2021-10-29 03:37:13,345 INFO L271 PluginConnector]: Initializing CodeCheck... [2021-10-29 03:37:13,356 INFO L275 PluginConnector]: CodeCheck initialized [2021-10-29 03:37:13,356 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:37:13" (1/1) ... [2021-10-29 03:37:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 03:37:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:37:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 26 states and 36 transitions. [2021-10-29 03:37:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-29 03:37:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 03:37:13,444 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:37:13,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:37:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 03:37:13,645 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 03:37:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:37:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2021-10-29 03:37:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-10-29 03:37:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 03:37:13,663 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:37:13,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:37:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 03:37:13,769 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 03:37:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:37:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 29 states and 38 transitions. [2021-10-29 03:37:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-10-29 03:37:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 03:37:13,814 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:37:13,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:37:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 03:37:13,947 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 03:37:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-10-29 03:37:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 34 states and 46 transitions. [2021-10-29 03:37:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-10-29 03:37:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 03:37:14,176 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2021-10-29 03:37:14,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 03:37:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:37:14,247 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 03:37:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:37:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:37:14,373 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 03:37:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 03:37:14,428 WARN L480 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2021-10-29 03:37:14,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 29.10 03:37:14 ImpRootNode [2021-10-29 03:37:14,474 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2021-10-29 03:37:14,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 03:37:14,475 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 03:37:14,475 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 03:37:14,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:37:13" (3/4) ... [2021-10-29 03:37:14,480 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 03:37:14,560 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/witness.graphml [2021-10-29 03:37:14,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 03:37:14,569 INFO L168 Benchmark]: Toolchain (without parser) took 2426.49 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.8 MB in the beginning and 65.1 MB in the end (delta: -14.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-10-29 03:37:14,574 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory was 68.1 MB in the beginning and 68.1 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 03:37:14,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.08 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.5 MB in the beginning and 75.6 MB in the end (delta: -25.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 03:37:14,575 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.65 ms. Allocated memory is still 107.0 MB. Free memory was 75.6 MB in the beginning and 73.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 03:37:14,576 INFO L168 Benchmark]: Boogie Preprocessor took 30.92 ms. Allocated memory is still 107.0 MB. Free memory was 73.9 MB in the beginning and 72.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 03:37:14,576 INFO L168 Benchmark]: RCFGBuilder took 623.59 ms. Allocated memory is still 107.0 MB. Free memory was 72.5 MB in the beginning and 57.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 03:37:14,577 INFO L168 Benchmark]: CodeCheck took 1129.84 ms. Allocated memory is still 107.0 MB. Free memory was 57.6 MB in the beginning and 67.7 MB in the end (delta: -10.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 03:37:14,577 INFO L168 Benchmark]: Witness Printer took 86.19 ms. Allocated memory is still 107.0 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 03:37:14,580 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, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, 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: 110 SDtfs, 24 SDslu, 32 SDs, 0 SdLazy, 52 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 61 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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: 573]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L573] reach_error() * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory was 68.1 MB in the beginning and 68.1 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 493.08 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.5 MB in the beginning and 75.6 MB in the end (delta: -25.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.65 ms. Allocated memory is still 107.0 MB. Free memory was 75.6 MB in the beginning and 73.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.92 ms. Allocated memory is still 107.0 MB. Free memory was 73.9 MB in the beginning and 72.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 623.59 ms. Allocated memory is still 107.0 MB. Free memory was 72.5 MB in the beginning and 57.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * CodeCheck took 1129.84 ms. Allocated memory is still 107.0 MB. Free memory was 57.6 MB in the beginning and 67.7 MB in the end (delta: -10.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 86.19 ms. Allocated memory is still 107.0 MB. Free memory was 67.2 MB in the beginning and 65.1 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 03:37:14,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4e0b19-f7db-4cfe-bef1-a58f18df77fb/bin/ukojak-Rh5K9KB4LI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...