./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/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_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/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_d064cffc-7b60-4d16-aceb-148f8fab5d1a/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 d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:10:44,355 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:10:44,432 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-06 22:10:44,438 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:10:44,439 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:10:44,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:10:44,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:10:44,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:10:44,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:10:44,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:10:44,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:10:44,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:10:44,490 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:10:44,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:10:44,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:10:44,492 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:10:44,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:10:44,493 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:10:44,493 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:10:44,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:10:44,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:10:44,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:10:44,495 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-06 22:10:44,496 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:10:44,496 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:10:44,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:10:44,497 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:10:44,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:10:44,498 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:10:44,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:10:44,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:44,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:10:44,501 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:10:44,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:10:44,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:10:44,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:10:44,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:10:44,525 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:10:44,526 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:10:44,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:10:44,526 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:10:44,527 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_d064cffc-7b60-4d16-aceb-148f8fab5d1a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 [2023-11-06 22:10:44,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:10:44,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:10:44,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:10:44,853 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:10:44,854 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:10:44,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-06 22:10:47,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:10:48,205 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:10:48,207 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-06 22:10:48,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/data/32b6230a9/9633e585afdf412490086e5b2943dc5e/FLAG5eb7c2c9e [2023-11-06 22:10:48,271 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/data/32b6230a9/9633e585afdf412490086e5b2943dc5e [2023-11-06 22:10:48,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:10:48,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:10:48,294 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:48,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:10:48,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:10:48,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:48" (1/1) ... [2023-11-06 22:10:48,313 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153ce857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:48, skipping insertion in model container [2023-11-06 22:10:48,313 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:48" (1/1) ... [2023-11-06 22:10:48,389 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:10:48,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:48,870 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:10:48,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:49,002 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:10:49,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49 WrapperNode [2023-11-06 22:10:49,003 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:49,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:49,005 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:10:49,005 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:10:49,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,083 INFO L138 Inliner]: procedures = 177, calls = 46, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 456 [2023-11-06 22:10:49,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:49,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:10:49,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:10:49,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:10:49,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,123 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:10:49,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:10:49,136 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:10:49,136 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:10:49,137 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2023-11-06 22:10:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:49,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:10:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d064cffc-7b60-4d16-aceb-148f8fab5d1a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:10:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-06 22:10:49,241 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-06 22:10:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-06 22:10:49,241 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-06 22:10:49,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:10:49,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:10:49,242 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-06 22:10:49,242 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-06 22:10:49,243 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:10:49,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:10:49,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:10:49,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:10:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:10:49,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:10:49,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:10:49,248 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 22:10:49,481 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:10:49,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:10:50,259 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:10:50,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:10:50,662 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:10:50,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:50 BoogieIcfgContainer [2023-11-06 22:10:50,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:10:50,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:10:50,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:10:50,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:10:50,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:48" (1/3) ... [2023-11-06 22:10:50,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff777d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:50, skipping insertion in model container [2023-11-06 22:10:50,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (2/3) ... [2023-11-06 22:10:50,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff777d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:50, skipping insertion in model container [2023-11-06 22:10:50,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:50" (3/3) ... [2023-11-06 22:10:50,682 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2023-11-06 22:10:50,696 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:10:50,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:10:50,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2023-11-06 22:10:50,706 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:10:50,838 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:10:50,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 327 transitions, 675 flow [2023-11-06 22:10:51,020 INFO L124 PetriNetUnfolderBase]: 18/324 cut-off events. [2023-11-06 22:10:51,020 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:10:51,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 18/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 971 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 274. Up to 4 conditions per place. [2023-11-06 22:10:51,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 327 transitions, 675 flow [2023-11-06 22:10:51,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 312 transitions, 639 flow [2023-11-06 22:10:51,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:10:51,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 312 transitions, 639 flow [2023-11-06 22:10:51,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 312 transitions, 639 flow [2023-11-06 22:10:51,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 312 transitions, 639 flow [2023-11-06 22:10:51,204 INFO L124 PetriNetUnfolderBase]: 18/312 cut-off events. [2023-11-06 22:10:51,205 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:10:51,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 312 events. 18/312 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 962 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 274. Up to 4 conditions per place. [2023-11-06 22:10:51,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 45582 [2023-11-06 22:10:58,131 INFO L134 LiptonReduction]: Checked pairs total: 181706 [2023-11-06 22:10:58,131 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-11-06 22:10:58,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:10:58,154 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;@1a4c28a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:10:58,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 110 error locations. [2023-11-06 22:10:58,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:10:58,158 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-06 22:10:58,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:10:58,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:10:58,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:10:58,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-06 22:10:58,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1733579416, now seen corresponding path program 1 times [2023-11-06 22:10:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:58,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722612273] [2023-11-06 22:10:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:58,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:58,420 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 22:10:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:58,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722612273] [2023-11-06 22:10:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722612273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:58,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:10:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194011701] [2023-11-06 22:10:58,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:58,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 521 [2023-11-06 22:10:58,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 171 transitions, 357 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 22:10:58,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:10:58,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 521 [2023-11-06 22:10:58,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:06,192 INFO L124 PetriNetUnfolderBase]: 38001/64548 cut-off events. [2023-11-06 22:11:06,192 INFO L125 PetriNetUnfolderBase]: For 1427/1427 co-relation queries the response was YES. [2023-11-06 22:11:06,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116977 conditions, 64548 events. 38001/64548 cut-off events. For 1427/1427 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 555834 event pairs, 13955 based on Foata normal form. 784/55680 useless extension candidates. Maximal degree in co-relation 109574. Up to 41092 conditions per place. [2023-11-06 22:11:06,728 INFO L140 encePairwiseOnDemand]: 477/521 looper letters, 114 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-11-06 22:11:06,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 653 flow [2023-11-06 22:11:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-11-06 22:11:06,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340371081253998 [2023-11-06 22:11:06,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-11-06 22:11:06,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-11-06 22:11:06,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:06,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-11-06 22:11:06,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 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 22:11:06,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:06,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:06,787 INFO L175 Difference]: Start difference. First operand has 165 places, 171 transitions, 357 flow. Second operand 3 states and 991 transitions. [2023-11-06 22:11:06,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 653 flow [2023-11-06 22:11:06,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 190 transitions, 637 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 22:11:06,819 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 350 flow [2023-11-06 22:11:06,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2023-11-06 22:11:06,827 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -30 predicate places. [2023-11-06 22:11:06,828 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 350 flow [2023-11-06 22:11:06,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 22:11:06,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:06,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:06,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:11:06,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-06 22:11:06,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash 746715775, now seen corresponding path program 1 times [2023-11-06 22:11:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132934197] [2023-11-06 22:11:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:06,944 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 22:11:06,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:06,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132934197] [2023-11-06 22:11:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132934197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:06,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094076436] [2023-11-06 22:11:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:06,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:11:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:11:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:11:06,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 521 [2023-11-06 22:11:06,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 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 22:11:06,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:06,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 521 [2023-11-06 22:11:06,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:14,112 INFO L124 PetriNetUnfolderBase]: 38183/67670 cut-off events. [2023-11-06 22:11:14,112 INFO L125 PetriNetUnfolderBase]: For 5850/5870 co-relation queries the response was YES. [2023-11-06 22:11:14,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127048 conditions, 67670 events. 38183/67670 cut-off events. For 5850/5870 co-relation queries the response was YES. Maximal size of possible extension queue 1694. Compared 617345 event pairs, 25879 based on Foata normal form. 0/55363 useless extension candidates. Maximal degree in co-relation 88120. Up to 46809 conditions per place. [2023-11-06 22:11:14,577 INFO L140 encePairwiseOnDemand]: 516/521 looper letters, 117 selfloop transitions, 4 changer transitions 0/195 dead transitions. [2023-11-06 22:11:14,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 719 flow [2023-11-06 22:11:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 942 transitions. [2023-11-06 22:11:14,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6026871401151631 [2023-11-06 22:11:14,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 942 transitions. [2023-11-06 22:11:14,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 942 transitions. [2023-11-06 22:11:14,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:14,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 942 transitions. [2023-11-06 22:11:14,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 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 22:11:14,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:14,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:14,599 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 350 flow. Second operand 3 states and 942 transitions. [2023-11-06 22:11:14,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 719 flow [2023-11-06 22:11:14,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 195 transitions, 693 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:14,709 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 354 flow [2023-11-06 22:11:14,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2023-11-06 22:11:14,711 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -29 predicate places. [2023-11-06 22:11:14,712 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 354 flow [2023-11-06 22:11:14,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 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 22:11:14,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:14,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:11:14,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-06 22:11:14,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1787483091, now seen corresponding path program 1 times [2023-11-06 22:11:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028283242] [2023-11-06 22:11:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:14,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:14,805 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 22:11:14,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:14,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028283242] [2023-11-06 22:11:14,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028283242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:14,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:14,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588368890] [2023-11-06 22:11:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:14,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:11:14,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:11:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:11:14,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 521 [2023-11-06 22:11:14,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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 22:11:14,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:14,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 521 [2023-11-06 22:11:14,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:23,787 INFO L124 PetriNetUnfolderBase]: 67204/111557 cut-off events. [2023-11-06 22:11:23,787 INFO L125 PetriNetUnfolderBase]: For 17910/19262 co-relation queries the response was YES. [2023-11-06 22:11:24,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219801 conditions, 111557 events. 67204/111557 cut-off events. For 17910/19262 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 991853 event pairs, 26693 based on Foata normal form. 0/95291 useless extension candidates. Maximal degree in co-relation 149018. Up to 57477 conditions per place. [2023-11-06 22:11:24,545 INFO L140 encePairwiseOnDemand]: 494/521 looper letters, 126 selfloop transitions, 20 changer transitions 0/204 dead transitions. [2023-11-06 22:11:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 204 transitions, 785 flow [2023-11-06 22:11:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2023-11-06 22:11:24,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886116442738324 [2023-11-06 22:11:24,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2023-11-06 22:11:24,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2023-11-06 22:11:24,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:24,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2023-11-06 22:11:24,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 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 22:11:24,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:24,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:24,561 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 354 flow. Second operand 3 states and 920 transitions. [2023-11-06 22:11:24,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 204 transitions, 785 flow [2023-11-06 22:11:24,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:11:24,679 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 516 flow [2023-11-06 22:11:24,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2023-11-06 22:11:24,681 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -26 predicate places. [2023-11-06 22:11:24,685 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 516 flow [2023-11-06 22:11:24,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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 22:11:24,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:24,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:11:24,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-06 22:11:24,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:24,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1787482752, now seen corresponding path program 1 times [2023-11-06 22:11:24,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:24,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561425349] [2023-11-06 22:11:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:24,754 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 22:11:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:24,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561425349] [2023-11-06 22:11:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561425349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:24,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406600202] [2023-11-06 22:11:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:11:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:11:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:11:24,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 521 [2023-11-06 22:11:24,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 516 flow. Second operand has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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 22:11:24,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:24,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 521 [2023-11-06 22:11:24,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:38,599 INFO L124 PetriNetUnfolderBase]: 97988/159220 cut-off events. [2023-11-06 22:11:38,599 INFO L125 PetriNetUnfolderBase]: For 45575/48537 co-relation queries the response was YES. [2023-11-06 22:11:39,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349307 conditions, 159220 events. 97988/159220 cut-off events. For 45575/48537 co-relation queries the response was YES. Maximal size of possible extension queue 3612. Compared 1443661 event pairs, 36055 based on Foata normal form. 189/141699 useless extension candidates. Maximal degree in co-relation 250409. Up to 82320 conditions per place. [2023-11-06 22:11:39,796 INFO L140 encePairwiseOnDemand]: 494/521 looper letters, 141 selfloop transitions, 22 changer transitions 0/229 dead transitions. [2023-11-06 22:11:39,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 229 transitions, 1032 flow [2023-11-06 22:11:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 921 transitions. [2023-11-06 22:11:39,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892514395393474 [2023-11-06 22:11:39,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 921 transitions. [2023-11-06 22:11:39,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 921 transitions. [2023-11-06 22:11:39,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:39,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 921 transitions. [2023-11-06 22:11:39,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.0) internal successors, (921), 3 states have internal predecessors, (921), 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 22:11:39,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:39,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 521.0) internal successors, (2084), 4 states have internal predecessors, (2084), 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 22:11:39,812 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 516 flow. Second operand 3 states and 921 transitions. [2023-11-06 22:11:39,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 229 transitions, 1032 flow [2023-11-06 22:11:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 229 transitions, 978 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:40,118 INFO L231 Difference]: Finished difference. Result has 141 places, 185 transitions, 666 flow [2023-11-06 22:11:40,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=141, PETRI_TRANSITIONS=185} [2023-11-06 22:11:40,120 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -24 predicate places. [2023-11-06 22:11:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 185 transitions, 666 flow [2023-11-06 22:11:40,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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 22:11:40,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:40,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:40,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:11:40,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader1Err8ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-06 22:11:40,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash 334733159, now seen corresponding path program 1 times [2023-11-06 22:11:40,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:40,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579461608] [2023-11-06 22:11:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:40,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:40,165 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 22:11:40,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579461608] [2023-11-06 22:11:40,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579461608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:40,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:40,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:11:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240898060] [2023-11-06 22:11:40,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:40,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:11:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:11:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:11:40,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 521 [2023-11-06 22:11:40,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 185 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 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 22:11:40,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:40,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 521 [2023-11-06 22:11:40,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand