./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/arithmetic_prog_ok.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/arithmetic_prog_ok.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 18:15:26,988 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 18:15:27,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 18:15:27,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 18:15:27,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 18:15:27,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 18:15:27,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 18:15:27,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 18:15:27,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 18:15:27,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 18:15:27,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 18:15:27,089 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 18:15:27,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 18:15:27,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 18:15:27,091 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 18:15:27,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 18:15:27,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 18:15:27,091 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 18:15:27,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 18:15:27,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 18:15:27,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 18:15:27,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 18:15:27,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 18:15:27,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 18:15:27,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 18:15:27,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 18:15:27,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 18:15:27,094 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 18:15:27,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 18:15:27,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 18:15:27,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 18:15:27,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 18:15:27,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 18:15:27,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 18:15:27,096 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 18:15:27,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 18:15:27,097 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 18:15:27,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 18:15:27,097 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 18:15:27,097 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 18:15:27,097 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 18:15:27,098 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 18:15:27,098 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 18:15:27,098 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 18:15:27,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 18:15:27,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 18:15:27,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 18:15:27,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 18:15:27,360 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 18:15:27,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2024-06-20 18:15:28,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 18:15:28,699 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 18:15:28,699 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2024-06-20 18:15:28,711 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5773f5da4/c15fb72bcd724b9ba0984627a4107885/FLAG3b6927ad1 [2024-06-20 18:15:28,720 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5773f5da4/c15fb72bcd724b9ba0984627a4107885 [2024-06-20 18:15:28,722 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 18:15:28,722 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 18:15:28,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/arithmetic_prog_ok.yml/witness.yml [2024-06-20 18:15:28,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 18:15:28,786 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 18:15:28,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 18:15:28,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 18:15:28,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 18:15:28,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:15:28" (1/2) ... [2024-06-20 18:15:28,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee1ce6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:28, skipping insertion in model container [2024-06-20 18:15:28,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:15:28" (1/2) ... [2024-06-20 18:15:28,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7cc148d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:28, skipping insertion in model container [2024-06-20 18:15:28,792 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:28" (2/2) ... [2024-06-20 18:15:28,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee1ce6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 06:15:28, skipping insertion in model container [2024-06-20 18:15:28,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:28" (2/2) ... [2024-06-20 18:15:28,793 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 18:15:28,822 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 18:15:28,823 INFO L97 edCorrectnessWitness]: Location invariant before [L915-L915] ((! multithreaded || ((0 <= num && num <= 1) && (num == 0 || num == 1))) && (! multithreaded || (m_locked || ((0 <= num && num <= 1) && (num == 0 || num == 1))))) && (! multithreaded || ((0 <= flag && flag <= 1) && (flag == 0 || flag == 1))) [2024-06-20 18:15:28,823 INFO L97 edCorrectnessWitness]: Location invariant before [L914-L914] ((! multithreaded || ((0 <= num && num <= 1) && (num == 0 || num == 1))) && (! multithreaded || (m_locked || ((0 <= num && num <= 1) && (num == 0 || num == 1))))) && (! multithreaded || ((0 <= flag && flag <= 1) && (flag == 0 || flag == 1))) [2024-06-20 18:15:28,823 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 18:15:28,823 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-20 18:15:28,823 INFO L106 edCorrectnessWitness]: ghost_update [L879-L879] m_locked = 1; [2024-06-20 18:15:28,823 INFO L106 edCorrectnessWitness]: ghost_update [L893-L893] m_locked = 1; [2024-06-20 18:15:28,823 INFO L106 edCorrectnessWitness]: ghost_update [L881-L881] m_locked = 1; [2024-06-20 18:15:28,824 INFO L106 edCorrectnessWitness]: ghost_update [L881-L881] m_locked = 0; [2024-06-20 18:15:28,824 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] m_locked = 0; [2024-06-20 18:15:28,824 INFO L106 edCorrectnessWitness]: ghost_update [L898-L898] m_locked = 0; [2024-06-20 18:15:28,824 INFO L106 edCorrectnessWitness]: ghost_update [L913-L913] multithreaded = 1; [2024-06-20 18:15:28,824 INFO L106 edCorrectnessWitness]: ghost_update [L895-L895] m_locked = 1; [2024-06-20 18:15:28,824 INFO L106 edCorrectnessWitness]: ghost_update [L895-L895] m_locked = 0; [2024-06-20 18:15:28,860 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 18:15:29,197 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 18:15:29,210 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 18:15:29,275 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update. at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.witness.ExtractedGhostUpdate.transform(ExtractedGhostUpdate.java:199) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.transformWithWitness(MainDispatcher.java:431) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:412) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleLoopBody(CHandler.java:3541) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2597) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:297) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleCompoundStatement(CHandler.java:1132) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:319) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleLoopBody(CHandler.java:3541) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2597) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:297) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleCompoundStatement(CHandler.java:1132) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:319) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:387) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1595) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:274) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2483) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:637) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:257) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.performMainRun(MainTranslator.java:253) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:204) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:118) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:145) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-06-20 18:15:29,282 INFO L158 Benchmark]: Toolchain (without parser) took 495.18ms. Allocated memory is still 134.2MB. Free memory was 100.3MB in the beginning and 75.2MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-20 18:15:29,282 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory was 90.4MB in the beginning and 90.3MB in the end (delta: 119.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 18:15:29,282 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 18:15:29,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 493.83ms. Allocated memory is still 134.2MB. Free memory was 100.3MB in the beginning and 75.2MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-20 18:15:29,284 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory was 90.4MB in the beginning and 90.3MB in the end (delta: 119.0kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 493.83ms. Allocated memory is still 134.2MB. Free memory was 100.3MB in the beginning and 75.2MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update. de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update.: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.witness.ExtractedGhostUpdate.transform(ExtractedGhostUpdate.java:199) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/arithmetic_prog_ok.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 18:15:31,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 18:15:31,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-06-20 18:15:31,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 18:15:31,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 18:15:31,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 18:15:31,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 18:15:31,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 18:15:31,319 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 18:15:31,319 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 18:15:31,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 18:15:31,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 18:15:31,320 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 18:15:31,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 18:15:31,321 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 18:15:31,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 18:15:31,322 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 18:15:31,322 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 18:15:31,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 18:15:31,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 18:15:31,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 18:15:31,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 18:15:31,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 18:15:31,324 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-06-20 18:15:31,324 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-06-20 18:15:31,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 18:15:31,325 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-06-20 18:15:31,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 18:15:31,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 18:15:31,325 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 18:15:31,327 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 18:15:31,327 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 18:15:31,328 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 18:15:31,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 18:15:31,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 18:15:31,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 18:15:31,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 18:15:31,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 18:15:31,329 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-06-20 18:15:31,330 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-06-20 18:15:31,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 18:15:31,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 18:15:31,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 18:15:31,331 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 18:15:31,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 18:15:31,331 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-06-20 18:15:31,331 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 18:15:31,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 18:15:31,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 18:15:31,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 18:15:31,637 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 18:15:31,638 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 18:15:31,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2024-06-20 18:15:32,900 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 18:15:33,129 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 18:15:33,130 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2024-06-20 18:15:33,150 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef452c1fe/df8afebc4c2b4b68bdb15ed5dbfbaf2b/FLAG05eb6001f [2024-06-20 18:15:33,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef452c1fe/df8afebc4c2b4b68bdb15ed5dbfbaf2b [2024-06-20 18:15:33,167 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 18:15:33,168 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 18:15:33,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/arithmetic_prog_ok.yml/witness.yml [2024-06-20 18:15:33,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 18:15:33,280 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 18:15:33,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 18:15:33,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 18:15:33,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 18:15:33,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:15:33" (1/2) ... [2024-06-20 18:15:33,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2115ad17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:33, skipping insertion in model container [2024-06-20 18:15:33,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:15:33" (1/2) ... [2024-06-20 18:15:33,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3664e824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:33, skipping insertion in model container [2024-06-20 18:15:33,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:33" (2/2) ... [2024-06-20 18:15:33,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2115ad17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 06:15:33, skipping insertion in model container [2024-06-20 18:15:33,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:33" (2/2) ... [2024-06-20 18:15:33,289 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 18:15:33,347 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 18:15:33,348 INFO L97 edCorrectnessWitness]: Location invariant before [L914-L914] ((! multithreaded || ((0 <= num && num <= 1) && (num == 0 || num == 1))) && (! multithreaded || (m_locked || ((0 <= num && num <= 1) && (num == 0 || num == 1))))) && (! multithreaded || ((0 <= flag && flag <= 1) && (flag == 0 || flag == 1))) [2024-06-20 18:15:33,348 INFO L97 edCorrectnessWitness]: Location invariant before [L915-L915] ((! multithreaded || ((0 <= num && num <= 1) && (num == 0 || num == 1))) && (! multithreaded || (m_locked || ((0 <= num && num <= 1) && (num == 0 || num == 1))))) && (! multithreaded || ((0 <= flag && flag <= 1) && (flag == 0 || flag == 1))) [2024-06-20 18:15:33,348 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-20 18:15:33,348 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L898-L898] m_locked = 0; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L879-L879] m_locked = 1; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] m_locked = 0; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L881-L881] m_locked = 0; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L881-L881] m_locked = 1; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L895-L895] m_locked = 1; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L895-L895] m_locked = 0; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L893-L893] m_locked = 1; [2024-06-20 18:15:33,349 INFO L106 edCorrectnessWitness]: ghost_update [L913-L913] multithreaded = 1; [2024-06-20 18:15:33,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 18:15:33,741 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 18:15:33,757 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 18:15:33,843 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update. at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.witness.ExtractedGhostUpdate.transform(ExtractedGhostUpdate.java:199) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.transformWithWitness(MainDispatcher.java:431) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:412) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleLoopBody(CHandler.java:3541) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2597) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:297) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleCompoundStatement(CHandler.java:1132) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:319) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleLoopBody(CHandler.java:3541) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2597) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:297) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleCompoundStatement(CHandler.java:1132) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:319) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:387) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1595) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:274) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2483) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:637) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:257) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.performMainRun(MainTranslator.java:253) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:204) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:118) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:145) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-06-20 18:15:33,848 INFO L158 Benchmark]: Toolchain (without parser) took 567.66ms. Allocated memory is still 90.2MB. Free memory was 63.5MB in the beginning and 66.8MB in the end (delta: -3.3MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2024-06-20 18:15:33,849 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 46.1MB. Free memory was 29.9MB in the beginning and 29.8MB in the end (delta: 38.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 18:15:33,849 INFO L158 Benchmark]: Witness Parser took 0.43ms. Allocated memory is still 90.2MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 18:15:33,850 INFO L158 Benchmark]: CACSL2BoogieTranslator took 565.75ms. Allocated memory is still 90.2MB. Free memory was 63.3MB in the beginning and 66.8MB in the end (delta: -3.5MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2024-06-20 18:15:33,851 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 46.1MB. Free memory was 29.9MB in the beginning and 29.8MB in the end (delta: 38.5kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.43ms. Allocated memory is still 90.2MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 565.75ms. Allocated memory is still 90.2MB. Free memory was 63.3MB in the beginning and 66.8MB in the end (delta: -3.5MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update. de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update.: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.witness.ExtractedGhostUpdate.transform(ExtractedGhostUpdate.java:199) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: C: pthread_cond_wait(&empty, &m); [881] cannot be (yet) annoted with a ghost update.