./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 cf1a7837 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_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl --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 d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:08:11,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:08:11,702 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-12 02:08:11,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:08:11,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:08:11,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:08:11,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:08:11,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:08:11,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:08:11,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:08:11,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:08:11,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:08:11,772 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:08:11,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:08:11,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:08:11,775 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:08:11,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:08:11,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:08:11,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:08:11,776 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:08:11,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:08:11,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:08:11,778 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-12 02:08:11,778 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:08:11,778 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:08:11,779 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:08:11,779 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:08:11,780 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:08:11,780 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:08:11,781 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:08:11,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:11,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:08:11,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:08:11,782 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:08:11,782 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:08:11,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:08:11,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:08:11,783 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:08:11,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:08:11,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:08:11,784 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:08:11,784 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_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 [2023-11-12 02:08:12,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:08:12,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:08:12,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:08:12,093 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:08:12,094 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:08:12,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-12 02:08:15,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:08:15,634 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:08:15,635 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-12 02:08:15,653 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/data/40100fd4f/fdddd7811fbe40f18ce1bde762cb22a1/FLAGe44b1a8b6 [2023-11-12 02:08:15,922 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/data/40100fd4f/fdddd7811fbe40f18ce1bde762cb22a1 [2023-11-12 02:08:15,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:08:15,926 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:08:15,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:15,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:08:15,935 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:08:15,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:15" (1/1) ... [2023-11-12 02:08:15,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39677874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:15, skipping insertion in model container [2023-11-12 02:08:15,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:15" (1/1) ... [2023-11-12 02:08:15,990 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:08:16,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:16,387 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:08:16,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:16,548 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:08:16,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16 WrapperNode [2023-11-12 02:08:16,549 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:16,550 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:16,550 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:08:16,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:08:16,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,649 INFO L138 Inliner]: procedures = 177, calls = 46, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 456 [2023-11-12 02:08:16,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:16,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:08:16,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:08:16,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:08:16,665 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:08:16,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:08:16,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:08:16,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:08:16,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (1/1) ... [2023-11-12 02:08:16,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:16,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:16,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:08:16,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d91b1b06-ae0b-47cc-ad68-51c0fb1f0f69/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:08:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-12 02:08:16,850 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-12 02:08:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-12 02:08:16,850 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-12 02:08:16,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:08:16,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:08:16,851 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-12 02:08:16,852 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-12 02:08:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:08:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:08:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:08:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:08:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:08:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:08:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:08:16,856 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:08:17,051 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:08:17,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:08:17,910 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:08:18,355 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:08:18,355 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:08:18,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:18 BoogieIcfgContainer [2023-11-12 02:08:18,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:08:18,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:08:18,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:08:18,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:08:18,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:08:15" (1/3) ... [2023-11-12 02:08:18,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3fdc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:18, skipping insertion in model container [2023-11-12 02:08:18,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:16" (2/3) ... [2023-11-12 02:08:18,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3fdc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:18, skipping insertion in model container [2023-11-12 02:08:18,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:18" (3/3) ... [2023-11-12 02:08:18,376 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2023-11-12 02:08:18,385 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:08:18,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:08:18,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2023-11-12 02:08:18,420 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:08:18,608 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:08:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 327 transitions, 675 flow [2023-11-12 02:08:18,887 INFO L124 PetriNetUnfolderBase]: 18/324 cut-off events. [2023-11-12 02:08:18,888 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:08:18,916 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. [2023-11-12 02:08:18,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 327 transitions, 675 flow [2023-11-12 02:08:18,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 312 transitions, 639 flow [2023-11-12 02:08:18,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:08:18,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 312 transitions, 639 flow [2023-11-12 02:08:18,975 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 312 transitions, 639 flow [2023-11-12 02:08:18,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 312 transitions, 639 flow [2023-11-12 02:08:19,081 INFO L124 PetriNetUnfolderBase]: 18/312 cut-off events. [2023-11-12 02:08:19,081 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:08:19,088 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. [2023-11-12 02:08:19,121 INFO L119 LiptonReduction]: Number of co-enabled transitions 45582 [2023-11-12 02:08:26,816 INFO L134 LiptonReduction]: Checked pairs total: 181706 [2023-11-12 02:08:26,817 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-11-12 02:08:26,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:26,840 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;@171057ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:26,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 110 error locations. [2023-11-12 02:08:26,844 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:08:26,844 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-12 02:08:26,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:26,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:26,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:08:26,846 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)] === [2023-11-12 02:08:26,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1733579416, now seen corresponding path program 1 times [2023-11-12 02:08:26,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:26,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713436696] [2023-11-12 02:08:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:26,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:27,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:27,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713436696] [2023-11-12 02:08:27,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713436696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:27,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:27,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:27,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655259146] [2023-11-12 02:08:27,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:27,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:27,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:27,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 521 [2023-11-12 02:08:27,268 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) [2023-11-12 02:08:27,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:27,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 521 [2023-11-12 02:08:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:08:35,731 INFO L124 PetriNetUnfolderBase]: 38001/64548 cut-off events. [2023-11-12 02:08:35,732 INFO L125 PetriNetUnfolderBase]: For 1427/1427 co-relation queries the response was YES. [2023-11-12 02:08:35,897 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. [2023-11-12 02:08:36,304 INFO L140 encePairwiseOnDemand]: 477/521 looper letters, 114 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-11-12 02:08:36,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 653 flow [2023-11-12 02:08:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:08:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-11-12 02:08:36,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340371081253998 [2023-11-12 02:08:36,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-11-12 02:08:36,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-11-12 02:08:36,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:08:36,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-11-12 02:08:36,346 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) [2023-11-12 02:08:36,359 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) [2023-11-12 02:08:36,361 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) [2023-11-12 02:08:36,363 INFO L175 Difference]: Start difference. First operand has 165 places, 171 transitions, 357 flow. Second operand 3 states and 991 transitions. [2023-11-12 02:08:36,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 653 flow [2023-11-12 02:08:36,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 190 transitions, 637 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-12 02:08:36,410 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 350 flow [2023-11-12 02:08:36,413 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} [2023-11-12 02:08:36,418 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -30 predicate places. [2023-11-12 02:08:36,418 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 350 flow [2023-11-12 02:08:36,419 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) [2023-11-12 02:08:36,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:36,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:36,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:08:36,420 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)] === [2023-11-12 02:08:36,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash 746715775, now seen corresponding path program 1 times [2023-11-12 02:08:36,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:36,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395865147] [2023-11-12 02:08:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:36,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395865147] [2023-11-12 02:08:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395865147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699773427] [2023-11-12 02:08:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:36,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 521 [2023-11-12 02:08:36,581 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) [2023-11-12 02:08:36,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:36,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 521 [2023-11-12 02:08:36,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:08:43,232 INFO L124 PetriNetUnfolderBase]: 38183/67670 cut-off events. [2023-11-12 02:08:43,232 INFO L125 PetriNetUnfolderBase]: For 5850/5870 co-relation queries the response was YES. [2023-11-12 02:08:43,373 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. [2023-11-12 02:08:43,714 INFO L140 encePairwiseOnDemand]: 516/521 looper letters, 117 selfloop transitions, 4 changer transitions 0/195 dead transitions. [2023-11-12 02:08:43,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 719 flow [2023-11-12 02:08:43,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:08:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 942 transitions. [2023-11-12 02:08:43,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6026871401151631 [2023-11-12 02:08:43,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 942 transitions. [2023-11-12 02:08:43,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 942 transitions. [2023-11-12 02:08:43,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:08:43,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 942 transitions. [2023-11-12 02:08:43,727 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) [2023-11-12 02:08:43,732 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) [2023-11-12 02:08:43,737 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) [2023-11-12 02:08:43,738 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 350 flow. Second operand 3 states and 942 transitions. [2023-11-12 02:08:43,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 719 flow [2023-11-12 02:08:44,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 195 transitions, 693 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:08:44,009 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 354 flow [2023-11-12 02:08:44,009 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} [2023-11-12 02:08:44,010 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -29 predicate places. [2023-11-12 02:08:44,011 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 354 flow [2023-11-12 02:08:44,012 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) [2023-11-12 02:08:44,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:44,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:08:44,013 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)] === [2023-11-12 02:08:44,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1787483091, now seen corresponding path program 1 times [2023-11-12 02:08:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517919086] [2023-11-12 02:08:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:44,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:44,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517919086] [2023-11-12 02:08:44,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517919086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:44,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:44,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352562920] [2023-11-12 02:08:44,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:44,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:44,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:44,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 521 [2023-11-12 02:08:44,154 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) [2023-11-12 02:08:44,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:44,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 521 [2023-11-12 02:08:44,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:08:54,216 INFO L124 PetriNetUnfolderBase]: 67204/111557 cut-off events. [2023-11-12 02:08:54,216 INFO L125 PetriNetUnfolderBase]: For 17910/19262 co-relation queries the response was YES. [2023-11-12 02:08:54,504 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. [2023-11-12 02:08:55,267 INFO L140 encePairwiseOnDemand]: 494/521 looper letters, 126 selfloop transitions, 20 changer transitions 0/204 dead transitions. [2023-11-12 02:08:55,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 204 transitions, 785 flow [2023-11-12 02:08:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:08:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2023-11-12 02:08:55,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886116442738324 [2023-11-12 02:08:55,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2023-11-12 02:08:55,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2023-11-12 02:08:55,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:08:55,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2023-11-12 02:08:55,281 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) [2023-11-12 02:08:55,287 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) [2023-11-12 02:08:55,289 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) [2023-11-12 02:08:55,290 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 354 flow. Second operand 3 states and 920 transitions. [2023-11-12 02:08:55,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 204 transitions, 785 flow [2023-11-12 02:08:55,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:08:55,444 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 516 flow [2023-11-12 02:08:55,445 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} [2023-11-12 02:08:55,446 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -26 predicate places. [2023-11-12 02:08:55,446 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 516 flow [2023-11-12 02:08:55,448 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) [2023-11-12 02:08:55,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:55,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:08:55,449 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)] === [2023-11-12 02:08:55,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1787482752, now seen corresponding path program 1 times [2023-11-12 02:08:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:55,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74447178] [2023-11-12 02:08:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:55,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:55,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:55,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74447178] [2023-11-12 02:08:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74447178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:55,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:55,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:55,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059870386] [2023-11-12 02:08:55,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:55,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:55,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:55,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 521 [2023-11-12 02:08:55,558 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) [2023-11-12 02:08:55,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:55,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 521 [2023-11-12 02:08:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand