./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:24,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:25,108 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-06 23:01:25,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:25,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:25,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:25,154 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:25,155 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:25,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:25,161 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:25,162 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:25,162 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:25,163 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:25,164 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:25,165 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:25,165 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:25,166 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:25,166 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:25,166 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:25,167 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:25,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:25,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:25,168 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-06 23:01:25,169 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:01:25,169 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:25,170 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:25,170 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:25,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:25,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:25,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:25,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:25,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:25,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:25,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:25,174 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:25,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:25,175 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:25,175 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:25,175 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:25,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:25,176 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:25,176 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2023-11-06 23:01:25,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:25,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:25,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:25,524 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:25,525 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:25,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2023-11-06 23:01:28,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:01:28,963 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:01:28,963 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2023-11-06 23:01:28,989 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/data/c101aa02c/51669fdad0214d1a8c67c6724e6e3bcc/FLAG119ed9634 [2023-11-06 23:01:29,008 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/data/c101aa02c/51669fdad0214d1a8c67c6724e6e3bcc [2023-11-06 23:01:29,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:01:29,016 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:01:29,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:29,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:01:29,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:01:29,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552941c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29, skipping insertion in model container [2023-11-06 23:01:29,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,097 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:01:29,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:29,611 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:01:29,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:29,757 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:01:29,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29 WrapperNode [2023-11-06 23:01:29,758 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:29,759 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:29,759 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:01:29,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:01:29,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,855 INFO L138 Inliner]: procedures = 177, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 486 [2023-11-06 23:01:29,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:29,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:01:29,857 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:01:29,857 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:01:29,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:01:29,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:01:29,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:01:29,913 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:01:29,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (1/1) ... [2023-11-06 23:01:29,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:29,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:01:29,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e54d3-b616-4481-8676-6aea46fbeae9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:01:30,050 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-06 23:01:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-06 23:01:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-06 23:01:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-06 23:01:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:01:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:01:30,054 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-06 23:01:30,055 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-06 23:01:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:01:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:01:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:01:30,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:01:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:01:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:01:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:01:30,062 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:01:30,237 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:01:30,239 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:01:31,043 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:01:31,458 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:01:31,458 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:01:31,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:31 BoogieIcfgContainer [2023-11-06 23:01:31,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:01:31,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:01:31,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:01:31,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:01:31,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:29" (1/3) ... [2023-11-06 23:01:31,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce03a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:31, skipping insertion in model container [2023-11-06 23:01:31,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:29" (2/3) ... [2023-11-06 23:01:31,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce03a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:31, skipping insertion in model container [2023-11-06 23:01:31,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:31" (3/3) ... [2023-11-06 23:01:31,475 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2023-11-06 23:01:31,486 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:01:31,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:01:31,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-11-06 23:01:31,499 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:01:31,702 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:01:31,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 343 transitions, 707 flow [2023-11-06 23:01:31,987 INFO L124 PetriNetUnfolderBase]: 18/340 cut-off events. [2023-11-06 23:01:31,987 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:01:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 340 events. 18/340 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1106 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 290. Up to 4 conditions per place. [2023-11-06 23:01:32,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 343 transitions, 707 flow [2023-11-06 23:01:32,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 328 transitions, 671 flow [2023-11-06 23:01:32,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:01:32,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 328 transitions, 671 flow [2023-11-06 23:01:32,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 328 transitions, 671 flow [2023-11-06 23:01:32,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 328 transitions, 671 flow [2023-11-06 23:01:32,199 INFO L124 PetriNetUnfolderBase]: 18/328 cut-off events. [2023-11-06 23:01:32,199 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:01:32,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 328 events. 18/328 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1100 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 290. Up to 4 conditions per place. [2023-11-06 23:01:32,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 49518 [2023-11-06 23:01:40,351 INFO L134 LiptonReduction]: Checked pairs total: 280596 [2023-11-06 23:01:40,351 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-11-06 23:01:40,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:01:40,374 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4cda90cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:01:40,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2023-11-06 23:01:40,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:01:40,379 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-06 23:01:40,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:01:40,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:40,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:01:40,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-06 23:01:40,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1790668491, now seen corresponding path program 1 times [2023-11-06 23:01:40,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:40,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841419580] [2023-11-06 23:01:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:40,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:40,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841419580] [2023-11-06 23:01:40,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841419580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:40,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096517891] [2023-11-06 23:01:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:40,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:40,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:40,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 516 [2023-11-06 23:01:40,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 203 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 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) [2023-11-06 23:01:40,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:40,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 516 [2023-11-06 23:01:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:48,452 INFO L124 PetriNetUnfolderBase]: 35527/64507 cut-off events. [2023-11-06 23:01:48,453 INFO L125 PetriNetUnfolderBase]: For 1461/1461 co-relation queries the response was YES. [2023-11-06 23:01:48,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113212 conditions, 64507 events. 35527/64507 cut-off events. For 1461/1461 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 605631 event pairs, 12351 based on Foata normal form. 732/54283 useless extension candidates. Maximal degree in co-relation 104227. Up to 38061 conditions per place. [2023-11-06 23:01:49,015 INFO L140 encePairwiseOnDemand]: 473/516 looper letters, 114 selfloop transitions, 9 changer transitions 0/224 dead transitions. [2023-11-06 23:01:49,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 224 transitions, 721 flow [2023-11-06 23:01:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-11-06 23:01:49,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6660206718346253 [2023-11-06 23:01:49,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-11-06 23:01:49,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-11-06 23:01:49,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:49,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-11-06 23:01:49,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 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) [2023-11-06 23:01:49,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 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) [2023-11-06 23:01:49,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 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) [2023-11-06 23:01:49,065 INFO L175 Difference]: Start difference. First operand has 197 places, 203 transitions, 421 flow. Second operand 3 states and 1031 transitions. [2023-11-06 23:01:49,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 224 transitions, 721 flow [2023-11-06 23:01:49,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 224 transitions, 705 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 23:01:49,206 INFO L231 Difference]: Finished difference. Result has 168 places, 178 transitions, 416 flow [2023-11-06 23:01:49,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=168, PETRI_TRANSITIONS=178} [2023-11-06 23:01:49,213 INFO L281 CegarLoopForPetriNet]: 197 programPoint places, -29 predicate places. [2023-11-06 23:01:49,214 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 178 transitions, 416 flow [2023-11-06 23:01:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 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) [2023-11-06 23:01:49,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:49,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:01:49,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-06 23:01:49,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1837636570, now seen corresponding path program 1 times [2023-11-06 23:01:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978879404] [2023-11-06 23:01:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978879404] [2023-11-06 23:01:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978879404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:49,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:49,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905799883] [2023-11-06 23:01:49,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:49,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:49,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 516 [2023-11-06 23:01:49,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 178 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2023-11-06 23:01:49,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:49,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 516 [2023-11-06 23:01:49,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:00,734 INFO L124 PetriNetUnfolderBase]: 70091/123657 cut-off events. [2023-11-06 23:02:00,734 INFO L125 PetriNetUnfolderBase]: For 9218/9406 co-relation queries the response was YES. [2023-11-06 23:02:01,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229247 conditions, 123657 events. 70091/123657 cut-off events. For 9218/9406 co-relation queries the response was YES. Maximal size of possible extension queue 2842. Compared 1211355 event pairs, 26499 based on Foata normal form. 0/104268 useless extension candidates. Maximal degree in co-relation 150444. Up to 58097 conditions per place. [2023-11-06 23:02:01,665 INFO L140 encePairwiseOnDemand]: 489/516 looper letters, 128 selfloop transitions, 20 changer transitions 0/238 dead transitions. [2023-11-06 23:02:01,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 238 transitions, 852 flow [2023-11-06 23:02:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-11-06 23:02:01,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253229974160207 [2023-11-06 23:02:01,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-11-06 23:02:01,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-11-06 23:02:01,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:01,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-11-06 23:02:01,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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) [2023-11-06 23:02:01,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 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) [2023-11-06 23:02:01,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 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) [2023-11-06 23:02:01,688 INFO L175 Difference]: Start difference. First operand has 168 places, 178 transitions, 416 flow. Second operand 3 states and 968 transitions. [2023-11-06 23:02:01,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 238 transitions, 852 flow [2023-11-06 23:02:02,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 238 transitions, 828 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:02,017 INFO L231 Difference]: Finished difference. Result has 170 places, 196 transitions, 564 flow [2023-11-06 23:02:02,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=170, PETRI_TRANSITIONS=196} [2023-11-06 23:02:02,019 INFO L281 CegarLoopForPetriNet]: 197 programPoint places, -27 predicate places. [2023-11-06 23:02:02,019 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 196 transitions, 564 flow [2023-11-06 23:02:02,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2023-11-06 23:02:02,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:02,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:02:02,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_updaterErr6ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-06 23:02:02,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1837636169, now seen corresponding path program 1 times [2023-11-06 23:02:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:02,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026234438] [2023-11-06 23:02:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026234438] [2023-11-06 23:02:02,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026234438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:02,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:02,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040267869] [2023-11-06 23:02:02,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 516 [2023-11-06 23:02:02,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 196 transitions, 564 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2023-11-06 23:02:02,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:02,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 516 [2023-11-06 23:02:02,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:18,220 INFO L124 PetriNetUnfolderBase]: 98843/177573 cut-off events. [2023-11-06 23:02:18,220 INFO L125 PetriNetUnfolderBase]: For 35045/35959 co-relation queries the response was YES. [2023-11-06 23:02:18,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355959 conditions, 177573 events. 98843/177573 cut-off events. For 35045/35959 co-relation queries the response was YES. Maximal size of possible extension queue 4391. Compared 1861292 event pairs, 37481 based on Foata normal form. 182/154275 useless extension candidates. Maximal degree in co-relation 250498. Up to 82923 conditions per place. [2023-11-06 23:02:19,717 INFO L140 encePairwiseOnDemand]: 489/516 looper letters, 135 selfloop transitions, 22 changer transitions 0/260 dead transitions. [2023-11-06 23:02:19,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 260 transitions, 1054 flow [2023-11-06 23:02:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 965 transitions. [2023-11-06 23:02:19,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233850129198967 [2023-11-06 23:02:19,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 965 transitions. [2023-11-06 23:02:19,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 965 transitions. [2023-11-06 23:02:19,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:19,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 965 transitions. [2023-11-06 23:02:19,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 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) [2023-11-06 23:02:19,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 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) [2023-11-06 23:02:19,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 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) [2023-11-06 23:02:19,740 INFO L175 Difference]: Start difference. First operand has 170 places, 196 transitions, 564 flow. Second operand 3 states and 965 transitions. [2023-11-06 23:02:19,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 260 transitions, 1054 flow [2023-11-06 23:02:19,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 260 transitions, 1002 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:20,006 INFO L231 Difference]: Finished difference. Result has 172 places, 216 transitions, 714 flow [2023-11-06 23:02:20,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=172, PETRI_TRANSITIONS=216} [2023-11-06 23:02:20,008 INFO L281 CegarLoopForPetriNet]: 197 programPoint places, -25 predicate places. [2023-11-06 23:02:20,008 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 216 transitions, 714 flow [2023-11-06 23:02:20,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2023-11-06 23:02:20,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:20,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:20,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:02:20,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-06 23:02:20,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2073114148, now seen corresponding path program 1 times [2023-11-06 23:02:20,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:20,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752598934] [2023-11-06 23:02:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:20,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752598934] [2023-11-06 23:02:20,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752598934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:20,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:20,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:20,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106321612] [2023-11-06 23:02:20,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:20,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 516 [2023-11-06 23:02:20,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 216 transitions, 714 flow. Second operand has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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) [2023-11-06 23:02:20,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:20,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 516 [2023-11-06 23:02:20,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand