./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 30e01a73 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_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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-30e01a7 [2023-11-23 22:27:59,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:27:59,249 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-23 22:27:59,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:27:59,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:27:59,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:27:59,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:27:59,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:27:59,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:27:59,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:27:59,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:27:59,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:27:59,285 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:27:59,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:27:59,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:27:59,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:27:59,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:27:59,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:27:59,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:27:59,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:27:59,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:27:59,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:27:59,292 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-23 22:27:59,292 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:27:59,293 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:27:59,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:27:59,294 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:27:59,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:27:59,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:27:59,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:27:59,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:59,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:27:59,298 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:27:59,298 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:27:59,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:27:59,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:27:59,300 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:27:59,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:27:59,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:27:59,302 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:27:59,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:27:59,303 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_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2023-11-23 22:27:59,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:27:59,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:27:59,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:27:59,649 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:27:59,649 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:27:59,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2023-11-23 22:28:02,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:28:03,001 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:28:03,002 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2023-11-23 22:28:03,019 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/data/6cf274a78/cf28768b862045508505b718e8a2ee4b/FLAG1319d0bca [2023-11-23 22:28:03,035 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/data/6cf274a78/cf28768b862045508505b718e8a2ee4b [2023-11-23 22:28:03,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:28:03,040 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:28:03,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:28:03,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:28:03,047 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:28:03,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4692fa0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03, skipping insertion in model container [2023-11-23 22:28:03,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,096 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:28:03,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:28:03,519 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:28:03,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:28:03,631 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:28:03,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03 WrapperNode [2023-11-23 22:28:03,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:28:03,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:28:03,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:28:03,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:28:03,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,713 INFO L138 Inliner]: procedures = 178, calls = 57, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 489 [2023-11-23 22:28:03,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:28:03,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:28:03,715 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:28:03,715 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:28:03,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,763 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,766 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:28:03,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:28:03,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:28:03,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:28:03,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (1/1) ... [2023-11-23 22:28:03,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:28:03,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:03,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:28:03,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fdbbef0-e391-4142-bcdc-88b7f548ec21/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:28:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-23 22:28:03,880 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-23 22:28:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-23 22:28:03,881 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-23 22:28:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:28:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:28:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-23 22:28:03,883 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-23 22:28:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:28:03,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:28:03,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:28:03,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:28:03,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:28:03,885 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:28:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:28:03,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:28:03,890 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:28:04,107 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:28:04,110 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:28:04,867 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:28:05,253 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:28:05,254 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 22:28:05,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:05 BoogieIcfgContainer [2023-11-23 22:28:05,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:28:05,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:28:05,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:28:05,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:28:05,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:28:03" (1/3) ... [2023-11-23 22:28:05,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55816db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:05, skipping insertion in model container [2023-11-23 22:28:05,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:03" (2/3) ... [2023-11-23 22:28:05,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55816db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:05, skipping insertion in model container [2023-11-23 22:28:05,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:05" (3/3) ... [2023-11-23 22:28:05,268 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2023-11-23 22:28:05,278 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:28:05,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:28:05,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-11-23 22:28:05,291 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:28:05,499 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:28:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 344 transitions, 709 flow [2023-11-23 22:28:05,781 INFO L124 PetriNetUnfolderBase]: 18/341 cut-off events. [2023-11-23 22:28:05,782 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:28:05,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 341 events. 18/341 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1114 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 291. Up to 4 conditions per place. [2023-11-23 22:28:05,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 344 transitions, 709 flow [2023-11-23 22:28:05,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 329 transitions, 673 flow [2023-11-23 22:28:05,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:28:05,850 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=LoopHeads, 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;@5516b69d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:28:05,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2023-11-23 22:28:05,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:28:05,867 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2023-11-23 22:28:05,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:28:05,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:05,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:05,868 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)] === [2023-11-23 22:28:05,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash -37209332, now seen corresponding path program 1 times [2023-11-23 22:28:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:05,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964708704] [2023-11-23 22:28:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:05,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:06,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:06,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964708704] [2023-11-23 22:28:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964708704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:06,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:06,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453635355] [2023-11-23 22:28:06,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:06,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:06,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 344 [2023-11-23 22:28:06,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 329 transitions, 673 flow. Second operand has 3 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 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) [2023-11-23 22:28:06,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:06,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 344 [2023-11-23 22:28:06,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:08,149 INFO L124 PetriNetUnfolderBase]: 1313/6747 cut-off events. [2023-11-23 22:28:08,150 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-23 22:28:08,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8623 conditions, 6747 events. 1313/6747 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 68646 event pairs, 374 based on Foata normal form. 400/5958 useless extension candidates. Maximal degree in co-relation 8314. Up to 1529 conditions per place. [2023-11-23 22:28:08,264 INFO L140 encePairwiseOnDemand]: 300/344 looper letters, 40 selfloop transitions, 8 changer transitions 0/315 dead transitions. [2023-11-23 22:28:08,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 315 transitions, 753 flow [2023-11-23 22:28:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-11-23 22:28:08,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.9273255813953488 [2023-11-23 22:28:08,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-11-23 22:28:08,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-11-23 22:28:08,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:08,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-11-23 22:28:08,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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) [2023-11-23 22:28:08,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:08,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:08,320 INFO L175 Difference]: Start difference. First operand has 321 places, 329 transitions, 673 flow. Second operand 3 states and 957 transitions. [2023-11-23 22:28:08,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 315 transitions, 753 flow [2023-11-23 22:28:08,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 315 transitions, 737 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-23 22:28:08,344 INFO L231 Difference]: Finished difference. Result has 292 places, 301 transitions, 656 flow [2023-11-23 22:28:08,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=656, PETRI_PLACES=292, PETRI_TRANSITIONS=301} [2023-11-23 22:28:08,351 INFO L281 CegarLoopForPetriNet]: 321 programPoint places, -29 predicate places. [2023-11-23 22:28:08,351 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 301 transitions, 656 flow [2023-11-23 22:28:08,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 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) [2023-11-23 22:28:08,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:08,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:08,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:28:08,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-23 22:28:08,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:08,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1201899804, now seen corresponding path program 1 times [2023-11-23 22:28:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:08,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732326429] [2023-11-23 22:28:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:08,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:08,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732326429] [2023-11-23 22:28:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732326429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:08,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:08,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437890118] [2023-11-23 22:28:08,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:08,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:08,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:08,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:08,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 344 [2023-11-23 22:28:08,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 301 transitions, 656 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2023-11-23 22:28:08,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:08,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 344 [2023-11-23 22:28:08,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:10,198 INFO L124 PetriNetUnfolderBase]: 1210/6780 cut-off events. [2023-11-23 22:28:10,199 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-23 22:28:10,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8792 conditions, 6780 events. 1210/6780 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 71761 event pairs, 463 based on Foata normal form. 0/5602 useless extension candidates. Maximal degree in co-relation 4392. Up to 1179 conditions per place. [2023-11-23 22:28:10,302 INFO L140 encePairwiseOnDemand]: 339/344 looper letters, 30 selfloop transitions, 4 changer transitions 0/313 dead transitions. [2023-11-23 22:28:10,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 313 transitions, 751 flow [2023-11-23 22:28:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-11-23 22:28:10,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.874031007751938 [2023-11-23 22:28:10,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-11-23 22:28:10,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-11-23 22:28:10,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:10,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-11-23 22:28:10,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 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) [2023-11-23 22:28:10,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:10,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:10,315 INFO L175 Difference]: Start difference. First operand has 292 places, 301 transitions, 656 flow. Second operand 3 states and 902 transitions. [2023-11-23 22:28:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 313 transitions, 751 flow [2023-11-23 22:28:10,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 313 transitions, 735 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:28:10,327 INFO L231 Difference]: Finished difference. Result has 294 places, 304 transitions, 670 flow [2023-11-23 22:28:10,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=670, PETRI_PLACES=294, PETRI_TRANSITIONS=304} [2023-11-23 22:28:10,329 INFO L281 CegarLoopForPetriNet]: 321 programPoint places, -27 predicate places. [2023-11-23 22:28:10,329 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 304 transitions, 670 flow [2023-11-23 22:28:10,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2023-11-23 22:28:10,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:10,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:28:10,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_reader1Err8ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-23 22:28:10,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1374163534, now seen corresponding path program 1 times [2023-11-23 22:28:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:10,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561501548] [2023-11-23 22:28:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:10,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:10,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:10,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561501548] [2023-11-23 22:28:10,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561501548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:10,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:10,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258080702] [2023-11-23 22:28:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:10,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 344 [2023-11-23 22:28:10,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 304 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2023-11-23 22:28:10,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:10,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 344 [2023-11-23 22:28:10,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:12,331 INFO L124 PetriNetUnfolderBase]: 1413/8659 cut-off events. [2023-11-23 22:28:12,331 INFO L125 PetriNetUnfolderBase]: For 249/277 co-relation queries the response was YES. [2023-11-23 22:28:12,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11044 conditions, 8659 events. 1413/8659 cut-off events. For 249/277 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 98066 event pairs, 523 based on Foata normal form. 4/7154 useless extension candidates. Maximal degree in co-relation 3683. Up to 1317 conditions per place. [2023-11-23 22:28:12,463 INFO L140 encePairwiseOnDemand]: 339/344 looper letters, 31 selfloop transitions, 4 changer transitions 0/316 dead transitions. [2023-11-23 22:28:12,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 316 transitions, 769 flow [2023-11-23 22:28:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-11-23 22:28:12,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.874031007751938 [2023-11-23 22:28:12,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-11-23 22:28:12,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-11-23 22:28:12,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:12,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-11-23 22:28:12,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 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) [2023-11-23 22:28:12,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:12,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:12,477 INFO L175 Difference]: Start difference. First operand has 294 places, 304 transitions, 670 flow. Second operand 3 states and 902 transitions. [2023-11-23 22:28:12,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 316 transitions, 769 flow [2023-11-23 22:28:12,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 316 transitions, 761 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:28:12,490 INFO L231 Difference]: Finished difference. Result has 296 places, 307 transitions, 694 flow [2023-11-23 22:28:12,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=296, PETRI_TRANSITIONS=307} [2023-11-23 22:28:12,493 INFO L281 CegarLoopForPetriNet]: 321 programPoint places, -25 predicate places. [2023-11-23 22:28:12,493 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 307 transitions, 694 flow [2023-11-23 22:28:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2023-11-23 22:28:12,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:12,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:12,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:28:12,495 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-23 22:28:12,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 103582220, now seen corresponding path program 1 times [2023-11-23 22:28:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238597840] [2023-11-23 22:28:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:13,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238597840] [2023-11-23 22:28:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238597840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:13,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:13,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:28:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083134523] [2023-11-23 22:28:13,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:13,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:28:13,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 344 [2023-11-23 22:28:13,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 307 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 286.6666666666667) internal successors, (1720), 6 states have internal predecessors, (1720), 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) [2023-11-23 22:28:13,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:13,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 344 [2023-11-23 22:28:13,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:23,261 INFO L124 PetriNetUnfolderBase]: 10334/53109 cut-off events. [2023-11-23 22:28:23,262 INFO L125 PetriNetUnfolderBase]: For 908/980 co-relation queries the response was YES. [2023-11-23 22:28:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68523 conditions, 53109 events. 10334/53109 cut-off events. For 908/980 co-relation queries the response was YES. Maximal size of possible extension queue 1457. Compared 825060 event pairs, 1790 based on Foata normal form. 0/43271 useless extension candidates. Maximal degree in co-relation 44536. Up to 5634 conditions per place. [2023-11-23 22:28:24,032 INFO L140 encePairwiseOnDemand]: 337/344 looper letters, 67 selfloop transitions, 17 changer transitions 0/365 dead transitions. [2023-11-23 22:28:24,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 365 transitions, 1028 flow [2023-11-23 22:28:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:28:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1785 transitions. [2023-11-23 22:28:24,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8648255813953488 [2023-11-23 22:28:24,039 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1785 transitions. [2023-11-23 22:28:24,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1785 transitions. [2023-11-23 22:28:24,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:24,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1785 transitions. [2023-11-23 22:28:24,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.5) internal successors, (1785), 6 states have internal predecessors, (1785), 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) [2023-11-23 22:28:24,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 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) [2023-11-23 22:28:24,056 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 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) [2023-11-23 22:28:24,056 INFO L175 Difference]: Start difference. First operand has 296 places, 307 transitions, 694 flow. Second operand 6 states and 1785 transitions. [2023-11-23 22:28:24,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 365 transitions, 1028 flow [2023-11-23 22:28:24,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 365 transitions, 1002 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-23 22:28:24,074 INFO L231 Difference]: Finished difference. Result has 304 places, 323 transitions, 832 flow [2023-11-23 22:28:24,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=832, PETRI_PLACES=304, PETRI_TRANSITIONS=323} [2023-11-23 22:28:24,077 INFO L281 CegarLoopForPetriNet]: 321 programPoint places, -17 predicate places. [2023-11-23 22:28:24,077 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 323 transitions, 832 flow [2023-11-23 22:28:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.6666666666667) internal successors, (1720), 6 states have internal predecessors, (1720), 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) [2023-11-23 22:28:24,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:24,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:24,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:28:24,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-23 22:28:24,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2097914746, now seen corresponding path program 1 times [2023-11-23 22:28:24,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901692598] [2023-11-23 22:28:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:24,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:24,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901692598] [2023-11-23 22:28:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901692598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:24,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:24,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677798914] [2023-11-23 22:28:24,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:24,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 344 [2023-11-23 22:28:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 323 transitions, 832 flow. Second operand has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2023-11-23 22:28:24,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:24,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 344 [2023-11-23 22:28:24,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:35,581 INFO L124 PetriNetUnfolderBase]: 10237/69614 cut-off events. [2023-11-23 22:28:35,582 INFO L125 PetriNetUnfolderBase]: For 4629/4715 co-relation queries the response was YES. [2023-11-23 22:28:36,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88831 conditions, 69614 events. 10237/69614 cut-off events. For 4629/4715 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 1174023 event pairs, 3552 based on Foata normal form. 0/56851 useless extension candidates. Maximal degree in co-relation 57558. Up to 9602 conditions per place. [2023-11-23 22:28:36,500 INFO L140 encePairwiseOnDemand]: 339/344 looper letters, 44 selfloop transitions, 18 changer transitions 0/349 dead transitions. [2023-11-23 22:28:36,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 349 transitions, 1105 flow [2023-11-23 22:28:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-11-23 22:28:36,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.874031007751938 [2023-11-23 22:28:36,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-11-23 22:28:36,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-11-23 22:28:36,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:36,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-11-23 22:28:36,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 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) [2023-11-23 22:28:36,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:36,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-11-23 22:28:36,530 INFO L175 Difference]: Start difference. First operand has 304 places, 323 transitions, 832 flow. Second operand 3 states and 902 transitions. [2023-11-23 22:28:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 349 transitions, 1105 flow [2023-11-23 22:28:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 349 transitions, 1105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:28:36,560 INFO L231 Difference]: Finished difference. Result has 308 places, 340 transitions, 1068 flow [2023-11-23 22:28:36,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1068, PETRI_PLACES=308, PETRI_TRANSITIONS=340} [2023-11-23 22:28:36,565 INFO L281 CegarLoopForPetriNet]: 321 programPoint places, -13 predicate places. [2023-11-23 22:28:36,566 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 340 transitions, 1068 flow [2023-11-23 22:28:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2023-11-23 22:28:36,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:36,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:28:36,569 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-23 22:28:36,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2000418580, now seen corresponding path program 1 times [2023-11-23 22:28:36,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:36,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779104048] [2023-11-23 22:28:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:36,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:36,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779104048] [2023-11-23 22:28:36,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779104048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:36,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:36,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:36,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965807647] [2023-11-23 22:28:36,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:36,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:36,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 344 [2023-11-23 22:28:36,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 340 transitions, 1068 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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) [2023-11-23 22:28:36,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:36,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 344 [2023-11-23 22:28:36,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand