./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 9bd2c7ff 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_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:22,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:22,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-19 08:01:22,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:22,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:22,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:22,922 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:22,922 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:22,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:22,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:22,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:22,931 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:22,932 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:22,934 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:22,934 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:22,935 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:22,935 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:22,936 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:22,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:22,937 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:22,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:22,938 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:22,939 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 08:01:22,939 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:01:22,940 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:22,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:22,941 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:22,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:22,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:22,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:22,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:22,944 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:22,945 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:22,945 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:22,945 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:22,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:22,946 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:22,946 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:22,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:22,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:22,947 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:22,948 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_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2023-11-19 08:01:23,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:23,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:23,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:23,295 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:23,296 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:23,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2023-11-19 08:01:26,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:26,641 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:26,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2023-11-19 08:01:26,661 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/data/2c729767b/ed1eb5fd30934d66baa17a75b3caebf8/FLAG2b0d1d9f7 [2023-11-19 08:01:26,677 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/data/2c729767b/ed1eb5fd30934d66baa17a75b3caebf8 [2023-11-19 08:01:26,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:26,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:26,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:26,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:26,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:26,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,690 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676a3979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26, skipping insertion in model container [2023-11-19 08:01:26,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:27,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:27,213 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:27,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:27,313 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:27,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27 WrapperNode [2023-11-19 08:01:27,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:27,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:27,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:27,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:27,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,395 INFO L138 Inliner]: procedures = 177, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 486 [2023-11-19 08:01:27,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:27,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:27,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:27,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:27,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,415 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,415 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,433 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,439 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,452 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:27,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:27,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:27,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:27,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:27,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:27,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa16cf99-9a08-414a-be59-57cc7949ffe0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-19 08:01:27,549 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-19 08:01:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-19 08:01:27,549 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-19 08:01:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-19 08:01:27,550 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-19 08:01:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:01:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:27,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:27,553 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:01:27,776 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:27,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:28,590 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:28,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:28,939 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 08:01:28,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:28 BoogieIcfgContainer [2023-11-19 08:01:28,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:28,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:28,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:28,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:28,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:26" (1/3) ... [2023-11-19 08:01:28,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61676854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:28, skipping insertion in model container [2023-11-19 08:01:28,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27" (2/3) ... [2023-11-19 08:01:28,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61676854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:28, skipping insertion in model container [2023-11-19 08:01:28,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:28" (3/3) ... [2023-11-19 08:01:28,958 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2023-11-19 08:01:28,968 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:01:28,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:28,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-11-19 08:01:28,982 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:29,161 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:01:29,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 357 transitions, 735 flow [2023-11-19 08:01:29,358 INFO L124 PetriNetUnfolderBase]: 32/354 cut-off events. [2023-11-19 08:01:29,359 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:01:29,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 32/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1116 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 304. Up to 6 conditions per place. [2023-11-19 08:01:29,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 357 transitions, 735 flow [2023-11-19 08:01:29,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 342 transitions, 699 flow [2023-11-19 08:01:29,393 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:29,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 342 transitions, 699 flow [2023-11-19 08:01:29,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 342 transitions, 699 flow [2023-11-19 08:01:29,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 342 transitions, 699 flow [2023-11-19 08:01:29,547 INFO L124 PetriNetUnfolderBase]: 32/342 cut-off events. [2023-11-19 08:01:29,547 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:29,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 342 events. 32/342 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1117 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 304. Up to 6 conditions per place. [2023-11-19 08:01:29,596 INFO L119 LiptonReduction]: Number of co-enabled transitions 55550 [2023-11-19 08:01:37,563 INFO L134 LiptonReduction]: Checked pairs total: 290111 [2023-11-19 08:01:37,563 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-11-19 08:01:37,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:37,589 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;@46c34319, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:37,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2023-11-19 08:01:37,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:37,594 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-19 08:01:37,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:37,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:37,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:01:37,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-19 08:01:37,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1842243605, now seen corresponding path program 1 times [2023-11-19 08:01:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:37,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641094006] [2023-11-19 08:01:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:37,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:37,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:37,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641094006] [2023-11-19 08:01:37,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641094006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:37,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:37,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:37,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520614933] [2023-11-19 08:01:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:37,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:38,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 560 [2023-11-19 08:01:38,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 204 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:38,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:38,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 560 [2023-11-19 08:01:38,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:46,066 INFO L124 PetriNetUnfolderBase]: 35527/64507 cut-off events. [2023-11-19 08:01:46,066 INFO L125 PetriNetUnfolderBase]: For 1461/1461 co-relation queries the response was YES. [2023-11-19 08:01:46,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113212 conditions, 64507 events. 35527/64507 cut-off events. For 1461/1461 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 606014 event pairs, 12351 based on Foata normal form. 1094/54645 useless extension candidates. Maximal degree in co-relation 104227. Up to 38061 conditions per place. [2023-11-19 08:01:46,716 INFO L140 encePairwiseOnDemand]: 516/560 looper letters, 114 selfloop transitions, 9 changer transitions 0/224 dead transitions. [2023-11-19 08:01:46,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 224 transitions, 721 flow [2023-11-19 08:01:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-11-19 08:01:46,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148809523809524 [2023-11-19 08:01:46,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-11-19 08:01:46,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-11-19 08:01:46,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:46,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-11-19 08:01:46,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 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) [2023-11-19 08:01:46,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 560.0) internal successors, (2240), 4 states have internal predecessors, (2240), 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) [2023-11-19 08:01:46,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 560.0) internal successors, (2240), 4 states have internal predecessors, (2240), 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) [2023-11-19 08:01:46,777 INFO L175 Difference]: Start difference. First operand has 197 places, 204 transitions, 423 flow. Second operand 3 states and 1033 transitions. [2023-11-19 08:01:46,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 224 transitions, 721 flow [2023-11-19 08:01:46,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 224 transitions, 705 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 08:01:46,910 INFO L231 Difference]: Finished difference. Result has 168 places, 178 transitions, 416 flow [2023-11-19 08:01:46,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=560, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=168, PETRI_TRANSITIONS=178} [2023-11-19 08:01:46,917 INFO L281 CegarLoopForPetriNet]: 197 programPoint places, -29 predicate places. [2023-11-19 08:01:46,917 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 178 transitions, 416 flow [2023-11-19 08:01:46,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:46,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:46,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:46,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:46,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-19 08:01:46,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:46,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1891956187, now seen corresponding path program 1 times [2023-11-19 08:01:46,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:46,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110155375] [2023-11-19 08:01:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:46,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:47,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:47,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110155375] [2023-11-19 08:01:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110155375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:47,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:47,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112907417] [2023-11-19 08:01:47,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:47,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:47,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 560 [2023-11-19 08:01:47,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 178 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:47,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:47,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 560 [2023-11-19 08:01:47,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:58,296 INFO L124 PetriNetUnfolderBase]: 69771/123337 cut-off events. [2023-11-19 08:01:58,296 INFO L125 PetriNetUnfolderBase]: For 9264/9452 co-relation queries the response was YES. [2023-11-19 08:01:58,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228607 conditions, 123337 events. 69771/123337 cut-off events. For 9264/9452 co-relation queries the response was YES. Maximal size of possible extension queue 2838. Compared 1210655 event pairs, 26212 based on Foata normal form. 0/103980 useless extension candidates. Maximal degree in co-relation 150160. Up to 57777 conditions per place. [2023-11-19 08:01:59,407 INFO L140 encePairwiseOnDemand]: 533/560 looper letters, 128 selfloop transitions, 20 changer transitions 0/238 dead transitions. [2023-11-19 08:01:59,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 238 transitions, 852 flow [2023-11-19 08:01:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2023-11-19 08:01:59,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2023-11-19 08:01:59,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2023-11-19 08:01:59,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2023-11-19 08:01:59,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:59,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2023-11-19 08:01:59,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 560.0) internal successors, (2240), 4 states have internal predecessors, (2240), 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) [2023-11-19 08:01:59,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 560.0) internal successors, (2240), 4 states have internal predecessors, (2240), 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) [2023-11-19 08:01:59,658 INFO L175 Difference]: Start difference. First operand has 168 places, 178 transitions, 416 flow. Second operand 3 states and 968 transitions. [2023-11-19 08:01:59,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 238 transitions, 852 flow [2023-11-19 08:01:59,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 238 transitions, 828 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:59,795 INFO L231 Difference]: Finished difference. Result has 170 places, 196 transitions, 564 flow [2023-11-19 08:01:59,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=560, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=170, PETRI_TRANSITIONS=196} [2023-11-19 08:01:59,797 INFO L281 CegarLoopForPetriNet]: 197 programPoint places, -27 predicate places. [2023-11-19 08:01:59,797 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 196 transitions, 564 flow [2023-11-19 08:01:59,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:59,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:59,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:01:59,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_updaterErr6ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2023-11-19 08:01:59,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1891956588, now seen corresponding path program 1 times [2023-11-19 08:01:59,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:59,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713477259] [2023-11-19 08:01:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:59,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713477259] [2023-11-19 08:01:59,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713477259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:59,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689302780] [2023-11-19 08:01:59,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:59,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:59,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 560 [2023-11-19 08:01:59,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 196 transitions, 564 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:59,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 560 [2023-11-19 08:01:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand