./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-09-02_08-21-23.files/protection-ghost/read_write_lock-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e94c40da Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i ./goblint.2024-09-02_08-21-23.files/protection-ghost/read_write_lock-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-e94c40d-m [2024-09-23 08:15:37,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-23 08:15:37,676 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2024-09-23 08:15:37,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-23 08:15:37,683 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-23 08:15:37,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-23 08:15:37,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-23 08:15:37,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-23 08:15:37,716 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-23 08:15:37,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-23 08:15:37,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-23 08:15:37,717 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-23 08:15:37,717 INFO L153 SettingsManager]: * Use SBE=true [2024-09-23 08:15:37,718 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-23 08:15:37,718 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-23 08:15:37,718 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-23 08:15:37,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-23 08:15:37,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-23 08:15:37,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-23 08:15:37,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-23 08:15:37,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-23 08:15:37,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-23 08:15:37,721 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-23 08:15:37,721 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-23 08:15:37,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-23 08:15:37,722 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-23 08:15:37,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-23 08:15:37,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-23 08:15:37,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-23 08:15:37,723 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-23 08:15:37,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-09-23 08:15:37,723 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-23 08:15:37,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-23 08:15:37,724 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-23 08:15:37,724 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-23 08:15:37,725 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2024-09-23 08:15:37,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-23 08:15:37,725 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-23 08:15:37,726 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2024-09-23 08:15:37,726 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2024-09-23 08:15:37,726 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2024-09-23 08:15:37,726 INFO L153 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:/storage/repos/ultimate/releaseScripts/default/UGemCutter-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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-09-23 08:15:38,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-23 08:15:38,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-23 08:15:38,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-23 08:15:38,036 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-23 08:15:38,037 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-23 08:15:38,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/./goblint.2024-09-02_08-21-23.files/protection-ghost/read_write_lock-2.yml/witness.yml [2024-09-23 08:15:38,119 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-23 08:15:38,120 INFO L274 PluginConnector]: CDTParser initialized [2024-09-23 08:15:38,121 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2024-09-23 08:15:39,507 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-23 08:15:39,749 INFO L384 CDTParser]: Found 1 translation units. [2024-09-23 08:15:39,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2024-09-23 08:15:39,762 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/9517bd89e/fb08b6da2e924d13a7ba9480599543a0/FLAGcb50dcf42 [2024-09-23 08:15:39,774 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/9517bd89e/fb08b6da2e924d13a7ba9480599543a0 [2024-09-23 08:15:39,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-23 08:15:39,776 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-23 08:15:39,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-23 08:15:39,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-23 08:15:39,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-23 08:15:39,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 23.09 08:15:38" (1/2) ... [2024-09-23 08:15:39,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22424c3c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 23.09 08:15:39, skipping insertion in model container [2024-09-23 08:15:39,784 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 23.09 08:15:38" (1/2) ... [2024-09-23 08:15:39,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50485ca6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 23.09 08:15:39, skipping insertion in model container [2024-09-23 08:15:39,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.09 08:15:39" (2/2) ... [2024-09-23 08:15:39,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22424c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:39, skipping insertion in model container [2024-09-23 08:15:39,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.09 08:15:39" (2/2) ... [2024-09-23 08:15:39,824 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-23 08:15:39,825 INFO L1541 ArrayList]: Location invariant before [L751-L751] ((! multithreaded || (w == 0 || w == 1)) && (! multithreaded || (y == 0 || y == 3))) && (! multithreaded || (x == 0 || x == 3)) [2024-09-23 08:15:39,825 INFO L1541 ArrayList]: Location invariant before [L750-L750] ((! multithreaded || (w == 0 || w == 1)) && (! multithreaded || (y == 0 || y == 3))) && (! multithreaded || (x == 0 || x == 3)) [2024-09-23 08:15:39,825 INFO L1541 ArrayList]: Location invariant before [L752-L752] ((! multithreaded || (w == 0 || w == 1)) && (! multithreaded || (y == 0 || y == 3))) && (! multithreaded || (x == 0 || x == 3)) [2024-09-23 08:15:39,825 INFO L1541 ArrayList]: Location invariant before [L753-L753] ((! multithreaded || (w == 0 || w == 1)) && (! multithreaded || (y == 0 || y == 3))) && (! multithreaded || (x == 0 || x == 3)) [2024-09-23 08:15:39,825 INFO L1541 ArrayList]: ghost_variable multithreaded = 0 [2024-09-23 08:15:39,826 INFO L1541 ArrayList]: ghost_update [L749-L749] multithreaded = 1; [2024-09-23 08:15:39,859 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-23 08:15:40,218 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2024-09-23 08:15:40,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-23 08:15:40,243 INFO L200 MainTranslator]: Completed pre-run Start Parsing Local [2024-09-23 08:15:40,317 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-09-23 08:15:40,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-23 08:15:40,376 INFO L204 MainTranslator]: Completed translation [2024-09-23 08:15:40,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40 WrapperNode [2024-09-23 08:15:40,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-23 08:15:40,379 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-23 08:15:40,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-23 08:15:40,380 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-23 08:15:40,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,405 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,432 INFO L138 Inliner]: procedures = 172, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2024-09-23 08:15:40,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-23 08:15:40,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-23 08:15:40,436 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-23 08:15:40,436 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-23 08:15:40,446 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,464 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-23 08:15:40,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-23 08:15:40,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-23 08:15:40,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-23 08:15:40,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (1/1) ... [2024-09-23 08:15:40,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-09-23 08:15:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-23 08:15:40,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-09-23 08:15:40,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-09-23 08:15:40,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-09-23 08:15:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-23 08:15:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2024-09-23 08:15:40,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2024-09-23 08:15:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-23 08:15:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-09-23 08:15:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-23 08:15:40,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-23 08:15:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2024-09-23 08:15:40,607 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2024-09-23 08:15:40,609 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-09-23 08:15:40,761 INFO L242 CfgBuilder]: Building ICFG [2024-09-23 08:15:40,762 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-23 08:15:40,927 INFO L287 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-09-23 08:15:40,927 INFO L291 CfgBuilder]: Performing block encoding [2024-09-23 08:15:41,017 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-23 08:15:41,017 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-23 08:15:41,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 08:15:41 BoogieIcfgContainer [2024-09-23 08:15:41,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-23 08:15:41,019 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-23 08:15:41,020 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-23 08:15:41,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-23 08:15:41,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 23.09 08:15:38" (1/4) ... [2024-09-23 08:15:41,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3803f868 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 23.09 08:15:41, skipping insertion in model container [2024-09-23 08:15:41,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.09 08:15:39" (2/4) ... [2024-09-23 08:15:41,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3803f868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 08:15:41, skipping insertion in model container [2024-09-23 08:15:41,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.09 08:15:40" (3/4) ... [2024-09-23 08:15:41,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3803f868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 08:15:41, skipping insertion in model container [2024-09-23 08:15:41,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 08:15:41" (4/4) ... [2024-09-23 08:15:41,029 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2024-09-23 08:15:41,044 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-23 08:15:41,044 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-09-23 08:15:41,044 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-09-23 08:15:41,101 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-09-23 08:15:41,148 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-23 08:15:41,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-09-23 08:15:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-23 08:15:41,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-09-23 08:15:41,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2024-09-23 08:15:41,190 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-09-23 08:15:41,205 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == readerThread1of1ForFork0 ======== [2024-09-23 08:15:41,212 INFO L336 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, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b5dd770, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-23 08:15:41,213 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-23 08:15:41,417 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:41,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -154703312, now seen corresponding path program 1 times [2024-09-23 08:15:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:41,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837342818] [2024-09-23 08:15:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-23 08:15:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-23 08:15:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-23 08:15:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837342818] [2024-09-23 08:15:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837342818] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-23 08:15:41,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-23 08:15:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-23 08:15:41,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950220912] [2024-09-23 08:15:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-23 08:15:41,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-23 08:15:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-23 08:15:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-23 08:15:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-23 08:15:41,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:41,940 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-23 08:15:41,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2024-09-23 08:15:41,942 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:42,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-23 08:15:42,133 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:42,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1441620531, now seen corresponding path program 1 times [2024-09-23 08:15:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903021273] [2024-09-23 08:15:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:42,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-23 08:15:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-23 08:15:42,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-23 08:15:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903021273] [2024-09-23 08:15:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903021273] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-23 08:15:42,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-23 08:15:42,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-23 08:15:42,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203113728] [2024-09-23 08:15:42,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-23 08:15:42,276 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-23 08:15:42,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-23 08:15:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-23 08:15:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-23 08:15:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:42,277 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-23 08:15:42,278 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-09-23 08:15:42,278 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:42,278 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:42,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-23 08:15:42,441 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:42,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash 770711099, now seen corresponding path program 1 times [2024-09-23 08:15:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:42,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867648758] [2024-09-23 08:15:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-23 08:15:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-23 08:15:42,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-23 08:15:42,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867648758] [2024-09-23 08:15:42,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867648758] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-23 08:15:42,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-23 08:15:42,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-23 08:15:42,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829751097] [2024-09-23 08:15:42,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-23 08:15:42,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-23 08:15:42,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-23 08:15:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-23 08:15:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-23 08:15:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:42,611 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-23 08:15:42,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-09-23 08:15:42,612 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:42,612 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:42,612 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:42,854 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-23 08:15:42,854 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:42,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1493283121, now seen corresponding path program 1 times [2024-09-23 08:15:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282385070] [2024-09-23 08:15:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:42,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-23 08:15:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-23 08:15:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-23 08:15:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282385070] [2024-09-23 08:15:42,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282385070] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-23 08:15:42,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-23 08:15:42,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-23 08:15:42,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708101864] [2024-09-23 08:15:42,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-23 08:15:42,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-23 08:15:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-23 08:15:42,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-23 08:15:42,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-23 08:15:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:42,964 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-23 08:15:42,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2024-09-23 08:15:42,964 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:42,965 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:42,966 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:42,966 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-23 08:15:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:43,706 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-23 08:15:43,706 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1480795167, now seen corresponding path program 2 times [2024-09-23 08:15:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:43,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142394004] [2024-09-23 08:15:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-23 08:15:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-23 08:15:43,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-23 08:15:43,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142394004] [2024-09-23 08:15:43,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142394004] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-23 08:15:43,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-23 08:15:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-23 08:15:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415982230] [2024-09-23 08:15:43,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-23 08:15:43,759 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-23 08:15:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-23 08:15:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-23 08:15:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-23 08:15:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:43,761 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-23 08:15:43,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-09-23 08:15:43,761 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2024-09-23 08:15:43,761 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:43,761 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:43,761 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:43,761 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-23 08:15:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-23 08:15:43,902 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-23 08:15:43,903 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:43,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2021449079, now seen corresponding path program 3 times [2024-09-23 08:15:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084206410] [2024-09-23 08:15:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-23 08:15:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-23 08:15:44,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-23 08:15:44,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084206410] [2024-09-23 08:15:44,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084206410] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-23 08:15:44,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-23 08:15:44,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-23 08:15:44,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172824277] [2024-09-23 08:15:44,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-23 08:15:44,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-23 08:15:44,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-23 08:15:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-23 08:15:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-23 08:15:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:44,109 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-23 08:15:44,109 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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) [2024-09-23 08:15:44,109 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2024-09-23 08:15:44,110 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:44,110 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:44,110 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:44,110 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2024-09-23 08:15:44,110 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-23 08:15:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-23 08:15:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-23 08:15:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-23 08:15:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-23 08:15:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-23 08:15:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-23 08:15:45,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-23 08:15:45,242 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-23 08:15:45,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-23 08:15:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1586329511, now seen corresponding path program 1 times [2024-09-23 08:15:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-23 08:15:45,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995292840] [2024-09-23 08:15:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-23 08:15:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-23 08:15:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-23 08:15:45,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-09-23 08:15:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-23 08:15:45,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-09-23 08:15:45,285 INFO L326 BasicCegarLoop]: Counterexample is feasible [2024-09-23 08:15:45,286 INFO L785 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-23 08:15:45,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-23 08:15:45,297 INFO L408 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2024-09-23 08:15:45,300 INFO L312 ceAbstractionStarter]: Result for error location readerThread1of1ForFork0 was UNSAFE (1/3) [2024-09-23 08:15:45,364 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-09-23 08:15:45,367 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-23 08:15:45,369 INFO L469 ceAbstractionStarter]: Automizer considered 4 witness invariants [2024-09-23 08:15:45,370 INFO L470 ceAbstractionStarter]: WitnessConsidered=4 [2024-09-23 08:15:45,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 08:15:45 BasicIcfg [2024-09-23 08:15:45,372 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-23 08:15:45,373 INFO L158 Benchmark]: Toolchain (without parser) took 5597.21ms. Allocated memory was 167.8MB in the beginning and 249.6MB in the end (delta: 81.8MB). Free memory was 116.2MB in the beginning and 180.4MB in the end (delta: -64.2MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2024-09-23 08:15:45,374 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 100.7MB. Free memory was 65.3MB in the beginning and 65.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-23 08:15:45,374 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-23 08:15:45,374 INFO L158 Benchmark]: CACSL2BoogieTranslator took 601.10ms. Allocated memory is still 167.8MB. Free memory was 116.2MB in the beginning and 90.9MB in the end (delta: 25.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-09-23 08:15:45,375 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.95ms. Allocated memory is still 167.8MB. Free memory was 90.9MB in the beginning and 88.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-23 08:15:45,376 INFO L158 Benchmark]: Boogie Preprocessor took 38.18ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 137.4MB in the end (delta: -49.1MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2024-09-23 08:15:45,377 INFO L158 Benchmark]: RCFGBuilder took 542.74ms. Allocated memory is still 167.8MB. Free memory was 136.9MB in the beginning and 116.3MB in the end (delta: 20.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-09-23 08:15:45,377 INFO L158 Benchmark]: TraceAbstraction took 4353.09ms. Allocated memory was 167.8MB in the beginning and 249.6MB in the end (delta: 81.8MB). Free memory was 115.5MB in the beginning and 180.4MB in the end (delta: -64.9MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2024-09-23 08:15:45,378 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.21ms. Allocated memory is still 100.7MB. Free memory was 65.3MB in the beginning and 65.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 601.10ms. Allocated memory is still 167.8MB. Free memory was 116.2MB in the beginning and 90.9MB in the end (delta: 25.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.95ms. Allocated memory is still 167.8MB. Free memory was 90.9MB in the beginning and 88.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.18ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 137.4MB in the end (delta: -49.1MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * RCFGBuilder took 542.74ms. Allocated memory is still 167.8MB. Free memory was 136.9MB in the beginning and 116.3MB in the end (delta: 20.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 4353.09ms. Allocated memory was 167.8MB in the beginning and 249.6MB in the end (delta: 81.8MB). Free memory was 115.5MB in the beginning and 180.4MB in the end (delta: -64.9MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Partial order reduction statistics Independence relation #1 benchmarks: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 20933, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 1336, dependent conditional: 1246, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 20198, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 601, dependent conditional: 511, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 20198, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 601, dependent conditional: 511, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 23911, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 4314, dependent conditional: 4224, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 23911, independent: 19597, independent conditional: 972, independent unconditional: 18625, dependent: 4314, dependent conditional: 1388, dependent unconditional: 2926, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 23911, independent: 19597, independent conditional: 972, independent unconditional: 18625, dependent: 4314, dependent conditional: 1388, dependent unconditional: 2926, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2453, independent: 2273, independent conditional: 53, independent unconditional: 2220, dependent: 180, dependent conditional: 86, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2453, independent: 2149, independent conditional: 0, independent unconditional: 2149, dependent: 304, dependent conditional: 0, dependent unconditional: 304, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 304, independent: 124, independent conditional: 53, independent unconditional: 71, dependent: 180, dependent conditional: 86, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 304, independent: 124, independent conditional: 53, independent unconditional: 71, dependent: 180, dependent conditional: 86, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 649, independent: 327, independent conditional: 132, independent unconditional: 194, dependent: 322, dependent conditional: 144, dependent unconditional: 178, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Protected Queries: 0 ], Cache Queries: [ total: 23911, independent: 17324, independent conditional: 919, independent unconditional: 16405, dependent: 4134, dependent conditional: 1302, dependent unconditional: 2832, unknown: 2453, unknown conditional: 139, unknown unconditional: 2314] , Statistics on independence cache: Total cache size (in pairs): 2453, Positive cache size: 2273, Positive conditional cache size: 53, Positive unconditional cache size: 2220, Negative cache size: 180, Negative conditional cache size: 86, Negative unconditional cache size: 94, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 19253, Maximal queried relation: 5, Independence queries for same thread: 735, Persistent sets #1 benchmarks: Persistent set computation time: 0.7s, Number of persistent set computation: 2605, Number of trivial persistent sets: 1353, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2298, independent: 2208, independent conditional: 0, independent unconditional: 2208, dependent: 90, dependent conditional: 0, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 20933, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 1336, dependent conditional: 1246, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 20198, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 601, dependent conditional: 511, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 20198, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 601, dependent conditional: 511, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 23911, independent: 19597, independent conditional: 17389, independent unconditional: 2208, dependent: 4314, dependent conditional: 4224, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 23911, independent: 19597, independent conditional: 972, independent unconditional: 18625, dependent: 4314, dependent conditional: 1388, dependent unconditional: 2926, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 23911, independent: 19597, independent conditional: 972, independent unconditional: 18625, dependent: 4314, dependent conditional: 1388, dependent unconditional: 2926, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2453, independent: 2273, independent conditional: 53, independent unconditional: 2220, dependent: 180, dependent conditional: 86, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2453, independent: 2149, independent conditional: 0, independent unconditional: 2149, dependent: 304, dependent conditional: 0, dependent unconditional: 304, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 304, independent: 124, independent conditional: 53, independent unconditional: 71, dependent: 180, dependent conditional: 86, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 304, independent: 124, independent conditional: 53, independent unconditional: 71, dependent: 180, dependent conditional: 86, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 649, independent: 327, independent conditional: 132, independent unconditional: 194, dependent: 322, dependent conditional: 144, dependent unconditional: 178, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Protected Queries: 0 ], Cache Queries: [ total: 23911, independent: 17324, independent conditional: 919, independent unconditional: 16405, dependent: 4134, dependent conditional: 1302, dependent unconditional: 2832, unknown: 2453, unknown conditional: 139, unknown unconditional: 2314] , Statistics on independence cache: Total cache size (in pairs): 2453, Positive cache size: 2273, Positive conditional cache size: 53, Positive unconditional cache size: 2220, Negative cache size: 180, Negative conditional cache size: 86, Negative unconditional cache size: 94, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 19253, Maximal queried relation: 5, Independence queries for same thread: 735 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L1] 0 //@ ghost int multithreaded = 0; [L748] 0 pthread_t t1, t2, t3, t4; [L749] 0 //@ ghost multithreaded = 1; VAL [r=0, t1=-3, w=0, x=0, y=0] [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1=-3, w=0, x=0, y=0] [L750] 0 //@ assert (((!multithreaded || ((w == 0) || (w == 1))) && (!multithreaded || ((y == 0) || (y == 3)))) && (!multithreaded || ((x == 0) || (x == 3)))); VAL [r=0, t1=-3, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1=-3, t2=-2, w=0, x=0, y=0] [L724] 2 int l; VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L751] 0 //@ assert (((!multithreaded || ((w == 0) || (w == 1))) && (!multithreaded || ((y == 0) || (y == 3)))) && (!multithreaded || ((x == 0) || (x == 3)))); VAL [r=0, t1=-3, t2=-2, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1=-3, t2=-2, t3=-1, w=0, x=0, y=0] [L752] 0 //@ assert (((!multithreaded || ((w == 0) || (w == 1))) && (!multithreaded || ((y == 0) || (y == 3)))) && (!multithreaded || ((x == 0) || (x == 3)))); VAL [r=0, t1=-3, t2=-2, t3=-1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=0, t1=-3, t2=-2, t3=-1, t4=0, w=0, x=0, y=0] [L724] 4 int l; VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [\old(arg)={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 4 y = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 4 int ly = y; VAL [\old(arg)={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 4 int lx = x; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 4 !(!(ly == lx)) VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 4 l = r-1 VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L730] 2 y = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 4 r = l VAL [\old(arg)={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L745] 4 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L716] 1 x = 3 VAL [\old(arg)={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 2 int lx = x; VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 2 !(ly == lx) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] 2 reach_error() VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: readerThread1of1ForFork0 with 1 thread instances CFG has 7 procedures, 88 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 4.1s, OverallIterations: 7, TraceHistogramMax: 0, PathProgramHistogramMax: 3, EmptinessCheckTime: 2.8s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, 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: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 417 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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! [2024-09-23 08:15:45,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Ended with exit code 0 [2024-09-23 08:15:45,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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