./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 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_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/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_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/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_7e58c054-8d4d-447d-8858-95ee46365706/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 d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:00,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:01,059 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-19 07:48:01,067 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:01,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:01,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:01,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:01,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:01,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:01,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:01,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:01,114 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:01,115 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:01,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:01,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:48:01,116 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:01,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:01,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:01,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:01,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:48:01,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:01,124 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:48:01,124 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 07:48:01,125 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:48:01,125 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:01,126 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:48:01,126 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:01,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:01,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:01,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:01,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:01,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:01,130 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:01,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:48:01,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:01,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:01,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:01,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:48:01,132 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:01,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:01,132 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:01,132 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_7e58c054-8d4d-447d-8858-95ee46365706/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 [2023-11-19 07:48:01,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:01,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:01,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:01,520 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:01,520 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:01,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-19 07:48:04,842 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:05,153 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:05,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-19 07:48:05,178 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/data/56f95b5dc/316479cdf2d34866b05da38c9b945fbc/FLAG9c27ed15a [2023-11-19 07:48:05,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/data/56f95b5dc/316479cdf2d34866b05da38c9b945fbc [2023-11-19 07:48:05,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:05,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:05,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:05,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:05,224 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:05,225 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230dcdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05, skipping insertion in model container [2023-11-19 07:48:05,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:05,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:05,919 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:06,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:06,108 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:06,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06 WrapperNode [2023-11-19 07:48:06,109 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:06,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:06,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:06,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:06,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,168 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,238 INFO L138 Inliner]: procedures = 177, calls = 46, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 456 [2023-11-19 07:48:06,241 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:06,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:06,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:06,244 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:06,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,315 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:06,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:06,322 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:06,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:06,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (1/1) ... [2023-11-19 07:48:06,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:06,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:06,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e58c054-8d4d-447d-8858-95ee46365706/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-19 07:48:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-19 07:48:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-19 07:48:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-19 07:48:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:48:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:48:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-19 07:48:06,408 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-19 07:48:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:48:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:48:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:48:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:06,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:06,414 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 07:48:06,602 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:06,604 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:07,528 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:07,828 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:07,828 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:48:07,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:07 BoogieIcfgContainer [2023-11-19 07:48:07,840 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:07,843 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:07,843 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:07,847 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:07,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:05" (1/3) ... [2023-11-19 07:48:07,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a6820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:07, skipping insertion in model container [2023-11-19 07:48:07,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:06" (2/3) ... [2023-11-19 07:48:07,849 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a6820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:07, skipping insertion in model container [2023-11-19 07:48:07,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:07" (3/3) ... [2023-11-19 07:48:07,850 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2023-11-19 07:48:07,860 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:48:07,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:07,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2023-11-19 07:48:07,871 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:48:08,027 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:48:08,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 341 transitions, 703 flow [2023-11-19 07:48:08,325 INFO L124 PetriNetUnfolderBase]: 32/338 cut-off events. [2023-11-19 07:48:08,326 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:48:08,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 32/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 987 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 288. Up to 6 conditions per place. [2023-11-19 07:48:08,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 341 transitions, 703 flow [2023-11-19 07:48:08,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 326 transitions, 667 flow [2023-11-19 07:48:08,371 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:08,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 326 transitions, 667 flow [2023-11-19 07:48:08,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 326 transitions, 667 flow [2023-11-19 07:48:08,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 326 transitions, 667 flow [2023-11-19 07:48:08,491 INFO L124 PetriNetUnfolderBase]: 32/326 cut-off events. [2023-11-19 07:48:08,492 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:48:08,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 326 events. 32/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 980 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 288. Up to 6 conditions per place. [2023-11-19 07:48:08,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 51262 [2023-11-19 07:48:15,591 INFO L134 LiptonReduction]: Checked pairs total: 187566 [2023-11-19 07:48:15,592 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-11-19 07:48:15,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:15,616 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;@552c302b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:15,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 110 error locations. [2023-11-19 07:48:15,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:48:15,620 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-19 07:48:15,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:15,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:15,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:48:15,622 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)] === [2023-11-19 07:48:15,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1779605592, now seen corresponding path program 1 times [2023-11-19 07:48:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418986220] [2023-11-19 07:48:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,008 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 07:48:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418986220] [2023-11-19 07:48:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418986220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:16,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:16,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769653438] [2023-11-19 07:48:16,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:16,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:16,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:16,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 559 [2023-11-19 07:48:16,131 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) [2023-11-19 07:48:16,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:16,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 559 [2023-11-19 07:48:16,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:23,868 INFO L124 PetriNetUnfolderBase]: 38001/64548 cut-off events. [2023-11-19 07:48:23,869 INFO L125 PetriNetUnfolderBase]: For 1427/1427 co-relation queries the response was YES. [2023-11-19 07:48:24,040 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 555815 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. [2023-11-19 07:48:24,610 INFO L140 encePairwiseOnDemand]: 515/559 looper letters, 114 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-11-19 07:48:24,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 653 flow [2023-11-19 07:48:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-11-19 07:48:24,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909361955873583 [2023-11-19 07:48:24,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-11-19 07:48:24,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-11-19 07:48:24,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:24,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-11-19 07:48:24,657 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) [2023-11-19 07:48:24,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:24,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:24,673 INFO L175 Difference]: Start difference. First operand has 165 places, 171 transitions, 357 flow. Second operand 3 states and 991 transitions. [2023-11-19 07:48:24,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 653 flow [2023-11-19 07:48:24,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 190 transitions, 637 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 07:48:24,807 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 350 flow [2023-11-19 07:48:24,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, 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} [2023-11-19 07:48:24,814 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -30 predicate places. [2023-11-19 07:48:24,814 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 350 flow [2023-11-19 07:48:24,815 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) [2023-11-19 07:48:24,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:24,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:48:24,817 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)] === [2023-11-19 07:48:24,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash -403014633, now seen corresponding path program 1 times [2023-11-19 07:48:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:24,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085540228] [2023-11-19 07:48:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:24,977 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 07:48:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085540228] [2023-11-19 07:48:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085540228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:24,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:24,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700869160] [2023-11-19 07:48:24,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:24,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:25,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 559 [2023-11-19 07:48:25,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 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 07:48:25,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:25,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 559 [2023-11-19 07:48:25,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:31,206 INFO L124 PetriNetUnfolderBase]: 34580/60483 cut-off events. [2023-11-19 07:48:31,207 INFO L125 PetriNetUnfolderBase]: For 5616/5630 co-relation queries the response was YES. [2023-11-19 07:48:31,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115087 conditions, 60483 events. 34580/60483 cut-off events. For 5616/5630 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 533397 event pairs, 14814 based on Foata normal form. 774/50710 useless extension candidates. Maximal degree in co-relation 81412. Up to 33511 conditions per place. [2023-11-19 07:48:31,647 INFO L140 encePairwiseOnDemand]: 552/559 looper letters, 113 selfloop transitions, 5 changer transitions 0/190 dead transitions. [2023-11-19 07:48:31,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 190 transitions, 697 flow [2023-11-19 07:48:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 947 transitions. [2023-11-19 07:48:31,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5646988670244484 [2023-11-19 07:48:31,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 947 transitions. [2023-11-19 07:48:31,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 947 transitions. [2023-11-19 07:48:31,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:31,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 947 transitions. [2023-11-19 07:48:31,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 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 07:48:31,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:31,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:31,676 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 350 flow. Second operand 3 states and 947 transitions. [2023-11-19 07:48:31,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 190 transitions, 697 flow [2023-11-19 07:48:31,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 190 transitions, 673 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:31,750 INFO L231 Difference]: Finished difference. Result has 136 places, 149 transitions, 367 flow [2023-11-19 07:48:31,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=136, PETRI_TRANSITIONS=149} [2023-11-19 07:48:31,753 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -29 predicate places. [2023-11-19 07:48:31,753 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 149 transitions, 367 flow [2023-11-19 07:48:31,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 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 07:48:31,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:31,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:31,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:48:31,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-19 07:48:31,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash -403100844, now seen corresponding path program 1 times [2023-11-19 07:48:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:31,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872393878] [2023-11-19 07:48:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:31,963 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 07:48:31,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:31,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872393878] [2023-11-19 07:48:31,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872393878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:31,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:31,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:31,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39585201] [2023-11-19 07:48:31,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:31,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:31,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:31,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:31,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 559 [2023-11-19 07:48:31,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 149 transitions, 367 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) [2023-11-19 07:48:31,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:31,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 559 [2023-11-19 07:48:31,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:38,532 INFO L124 PetriNetUnfolderBase]: 38719/67395 cut-off events. [2023-11-19 07:48:38,532 INFO L125 PetriNetUnfolderBase]: For 5806/5908 co-relation queries the response was YES. [2023-11-19 07:48:38,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130810 conditions, 67395 events. 38719/67395 cut-off events. For 5806/5908 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 601759 event pairs, 25890 based on Foata normal form. 0/55127 useless extension candidates. Maximal degree in co-relation 90281. Up to 47700 conditions per place. [2023-11-19 07:48:38,994 INFO L140 encePairwiseOnDemand]: 554/559 looper letters, 120 selfloop transitions, 4 changer transitions 0/200 dead transitions. [2023-11-19 07:48:38,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 200 transitions, 743 flow [2023-11-19 07:48:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 942 transitions. [2023-11-19 07:48:39,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617173524150268 [2023-11-19 07:48:39,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 942 transitions. [2023-11-19 07:48:39,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 942 transitions. [2023-11-19 07:48:39,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:39,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 942 transitions. [2023-11-19 07:48:39,011 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) [2023-11-19 07:48:39,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:39,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:39,020 INFO L175 Difference]: Start difference. First operand has 136 places, 149 transitions, 367 flow. Second operand 3 states and 942 transitions. [2023-11-19 07:48:39,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 200 transitions, 743 flow [2023-11-19 07:48:39,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 200 transitions, 737 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:39,036 INFO L231 Difference]: Finished difference. Result has 138 places, 151 transitions, 384 flow [2023-11-19 07:48:39,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=151} [2023-11-19 07:48:39,038 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -27 predicate places. [2023-11-19 07:48:39,044 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 151 transitions, 384 flow [2023-11-19 07:48:39,046 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) [2023-11-19 07:48:39,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:39,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:39,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:48:39,047 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)] === [2023-11-19 07:48:39,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1922325237, now seen corresponding path program 1 times [2023-11-19 07:48:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:39,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718173982] [2023-11-19 07:48:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:39,146 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 07:48:39,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:39,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718173982] [2023-11-19 07:48:39,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718173982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:39,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:39,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289511955] [2023-11-19 07:48:39,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:39,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 559 [2023-11-19 07:48:39,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 151 transitions, 384 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) [2023-11-19 07:48:39,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:39,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 559 [2023-11-19 07:48:39,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:49,590 INFO L124 PetriNetUnfolderBase]: 68814/112290 cut-off events. [2023-11-19 07:48:49,590 INFO L125 PetriNetUnfolderBase]: For 20987/22537 co-relation queries the response was YES. [2023-11-19 07:48:49,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231017 conditions, 112290 events. 68814/112290 cut-off events. For 20987/22537 co-relation queries the response was YES. Maximal size of possible extension queue 2191. Compared 972630 event pairs, 27967 based on Foata normal form. 2/96047 useless extension candidates. Maximal degree in co-relation 153075. Up to 59109 conditions per place. [2023-11-19 07:48:50,486 INFO L140 encePairwiseOnDemand]: 532/559 looper letters, 129 selfloop transitions, 22 changer transitions 0/210 dead transitions. [2023-11-19 07:48:50,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 210 transitions, 839 flow [2023-11-19 07:48:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 921 transitions. [2023-11-19 07:48:50,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491949910554562 [2023-11-19 07:48:50,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 921 transitions. [2023-11-19 07:48:50,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 921 transitions. [2023-11-19 07:48:50,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:50,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 921 transitions. [2023-11-19 07:48:50,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.0) internal successors, (921), 3 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:50,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:50,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 07:48:50,504 INFO L175 Difference]: Start difference. First operand has 138 places, 151 transitions, 384 flow. Second operand 3 states and 921 transitions. [2023-11-19 07:48:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 210 transitions, 839 flow [2023-11-19 07:48:50,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 210 transitions, 832 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:50,603 INFO L231 Difference]: Finished difference. Result has 141 places, 171 transitions, 570 flow [2023-11-19 07:48:50,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=570, PETRI_PLACES=141, PETRI_TRANSITIONS=171} [2023-11-19 07:48:50,605 INFO L281 CegarLoopForPetriNet]: 165 programPoint places, -24 predicate places. [2023-11-19 07:48:50,605 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 171 transitions, 570 flow [2023-11-19 07:48:50,606 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) [2023-11-19 07:48:50,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:50,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:50,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:48:50,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-19 07:48:50,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1922325359, now seen corresponding path program 1 times [2023-11-19 07:48:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:50,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941203320] [2023-11-19 07:48:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:50,648 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 07:48:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941203320] [2023-11-19 07:48:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941203320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:50,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:50,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453275065] [2023-11-19 07:48:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:50,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:50,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 559 [2023-11-19 07:48:50,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 171 transitions, 570 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) [2023-11-19 07:48:50,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:50,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 559 [2023-11-19 07:48:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand