./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8287e6117d458104c3f33a0e7a83f771b50c3974e23296edc32c92f0b8cae546 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:14:18,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:14:18,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:14:19,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:14:19,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:14:19,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:14:19,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:14:19,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:14:19,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:14:19,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:14:19,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:14:19,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:14:19,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:14:19,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:14:19,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:14:19,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:14:19,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:14:19,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:14:19,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:14:19,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:14:19,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:14:19,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:14:19,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:14:19,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:14:19,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:14:19,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:14:19,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:14:19,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:14:19,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:14:19,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:14:19,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:14:19,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:14:19,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:14:19,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:14:19,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:14:19,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:14:19,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:14:19,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:14:19,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:14:19,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:14:19,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:14:19,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:14:19,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:14:19,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:14:19,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:14:19,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:14:19,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:14:19,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:14:19,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:14:19,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:14:19,117 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:14:19,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:14:19,118 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:14:19,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:14:19,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:14:19,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:14:19,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:14:19,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:14:19,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:14:19,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:14:19,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:14:19,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:14:19,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:14:19,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:14:19,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:14:19,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:14:19,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:14:19,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:14:19,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:14:19,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:14:19,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:14:19,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:14:19,123 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:14:19,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:14:19,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:14:19,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:14:19,124 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_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8287e6117d458104c3f33a0e7a83f771b50c3974e23296edc32c92f0b8cae546 [2021-11-20 07:14:19,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:14:19,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:14:19,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:14:19,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:14:19,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:14:19,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/forester-heap/dll-optional-2.i [2021-11-20 07:14:19,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/data/bc805301d/9a00491ee6e24564943d0da91b5fb93b/FLAGc7df5f075 [2021-11-20 07:14:20,038 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:14:20,043 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/sv-benchmarks/c/forester-heap/dll-optional-2.i [2021-11-20 07:14:20,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/data/bc805301d/9a00491ee6e24564943d0da91b5fb93b/FLAGc7df5f075 [2021-11-20 07:14:20,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/data/bc805301d/9a00491ee6e24564943d0da91b5fb93b [2021-11-20 07:14:20,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:14:20,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:14:20,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:14:20,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:14:20,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:14:20,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40047b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20, skipping insertion in model container [2021-11-20 07:14:20,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:14:20,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:14:20,752 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_59368ceb-f50b-4b35-9f5b-8b1c84e79885/sv-benchmarks/c/forester-heap/dll-optional-2.i[22706,22719] [2021-11-20 07:14:20,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:14:20,769 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:14:20,833 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_59368ceb-f50b-4b35-9f5b-8b1c84e79885/sv-benchmarks/c/forester-heap/dll-optional-2.i[22706,22719] [2021-11-20 07:14:20,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:14:20,864 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:14:20,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20 WrapperNode [2021-11-20 07:14:20,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:14:20,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:14:20,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:14:20,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:14:20,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,913 INFO L137 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 115 [2021-11-20 07:14:20,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:14:20,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:14:20,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:14:20,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:14:20,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:14:20,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:14:20,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:14:20,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:14:20,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (1/1) ... [2021-11-20 07:14:20,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:14:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:14:20,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:14:21,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:14:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:14:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:14:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:14:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:14:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:14:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:14:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:14:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:14:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:14:21,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:14:21,171 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:14:21,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:14:21,524 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:14:21,530 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:14:21,540 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 07:14:21,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:21 BoogieIcfgContainer [2021-11-20 07:14:21,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:14:21,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:14:21,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:14:21,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:14:21,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:14:20" (1/3) ... [2021-11-20 07:14:21,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c31cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:14:21, skipping insertion in model container [2021-11-20 07:14:21,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:20" (2/3) ... [2021-11-20 07:14:21,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c31cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:14:21, skipping insertion in model container [2021-11-20 07:14:21,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:21" (3/3) ... [2021-11-20 07:14:21,550 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-2.i [2021-11-20 07:14:21,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:14:21,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:14:21,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:14:21,611 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:14:21,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:14:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:14:21,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:21,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:21,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1853593862, now seen corresponding path program 1 times [2021-11-20 07:14:21,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:21,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941789713] [2021-11-20 07:14:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:21,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:14:21,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:14:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941789713] [2021-11-20 07:14:21,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941789713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:14:21,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:14:21,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:14:21,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335374191] [2021-11-20 07:14:21,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:14:21,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:14:21,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:14:21,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:14:21,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:14:21,899 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:21,916 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2021-11-20 07:14:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:14:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 07:14:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:21,927 INFO L225 Difference]: With dead ends: 43 [2021-11-20 07:14:21,927 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 07:14:21,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:14:21,934 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:21,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:14:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 07:14:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-20 07:14:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-20 07:14:21,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-20 07:14:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:21,965 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-20 07:14:21,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:14:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-20 07:14:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:14:21,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:21,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:21,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:14:21,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:14:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2143092324, now seen corresponding path program 1 times [2021-11-20 07:14:21,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:14:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975540639] [2021-11-20 07:14:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:21,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:14:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:14:22,025 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:14:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:14:22,092 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:14:22,092 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 07:14:22,094 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:14:22,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:14:22,100 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-20 07:14:22,103 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:14:22,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:14:22 BoogieIcfgContainer [2021-11-20 07:14:22,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:14:22,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:14:22,130 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:14:22,130 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:14:22,131 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:21" (3/4) ... [2021-11-20 07:14:22,133 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 07:14:22,169 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:14:22,170 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:14:22,171 INFO L158 Benchmark]: Toolchain (without parser) took 1819.39ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 60.2MB in the beginning and 82.5MB in the end (delta: -22.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:14:22,171 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory is still 77.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:14:22,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 508.20ms. Allocated memory is still 102.8MB. Free memory was 60.0MB in the beginning and 68.4MB in the end (delta: -8.4MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-20 07:14:22,172 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.72ms. Allocated memory is still 102.8MB. Free memory was 68.4MB in the beginning and 66.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:14:22,173 INFO L158 Benchmark]: Boogie Preprocessor took 34.80ms. Allocated memory is still 102.8MB. Free memory was 66.3MB in the beginning and 64.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:14:22,173 INFO L158 Benchmark]: RCFGBuilder took 585.35ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 49.0MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-20 07:14:22,174 INFO L158 Benchmark]: TraceAbstraction took 586.47ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 48.6MB in the beginning and 84.6MB in the end (delta: -36.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:14:22,174 INFO L158 Benchmark]: Witness Printer took 39.99ms. Allocated memory is still 123.7MB. Free memory was 84.6MB in the beginning and 82.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:14:22,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory is still 77.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 508.20ms. Allocated memory is still 102.8MB. Free memory was 60.0MB in the beginning and 68.4MB in the end (delta: -8.4MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.72ms. Allocated memory is still 102.8MB. Free memory was 68.4MB in the beginning and 66.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.80ms. Allocated memory is still 102.8MB. Free memory was 66.3MB in the beginning and 64.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 585.35ms. Allocated memory is still 102.8MB. Free memory was 64.6MB in the beginning and 49.0MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 586.47ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 48.6MB in the beginning and 84.6MB in the end (delta: -36.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 39.99ms. Allocated memory is still 123.7MB. Free memory was 84.6MB in the beginning and 82.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1009]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] COND TRUE __VERIFIER_nondet_int() [L1000] head->data = 2 [L1000] head->opt = malloc(sizeof(SLL)) [L1000] EXPR head->opt [L1000] head->opt->next = ((void*)0) [L1001] SLL* x = head; VAL [head={-1:0}, x={-1:0}] [L1003] COND FALSE !(__VERIFIER_nondet_int()) [L1006] x = head VAL [head={-1:0}, x={-1:0}] [L1007] COND TRUE x != ((void*)0) VAL [head={-1:0}, x={-1:0}] [L1009] EXPR x->data [L1009] EXPR x->data == 2 && x->opt == x [L1009] EXPR x->opt [L1009] EXPR x->data == 2 && x->opt == x VAL [head={-1:0}, x={-1:0}, x->data=2, x->data == 2 && x->opt == x=0, x->opt={-2:0}] [L1009] COND TRUE !(x->data == 2 && x->opt == x) [L1009] reach_error() VAL [head={-1:0}, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 34 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 07:14:22,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59368ceb-f50b-4b35-9f5b-8b1c84e79885/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (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