./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 8393723b 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_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:02:13,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:02:13,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:02:13,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:02:13,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:02:13,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:02:13,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:02:13,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:02:13,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:02:13,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:02:13,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:02:13,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:02:13,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:02:13,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:02:13,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:02:13,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:02:13,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:02:13,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:02:13,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:02:13,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:02:13,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:02:13,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:02:13,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:02:13,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:02:13,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:02:13,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:02:13,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:02:13,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:02:13,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:02:13,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:02:13,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:02:13,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:02:13,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:02:13,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:02:13,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:02:13,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:02:13,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:02:13,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:02:13,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:02:13,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:02:13,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:02:13,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/config/svcomp-DataRace-32bit-Automizer_Default.epf [2022-11-18 20:02:13,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:02:13,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:02:13,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:02:13,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:02:13,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:02:13,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:02:13,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:02:13,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:02:13,977 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:02:13,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:02:13,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:02:13,979 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:02:13,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:02:13,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:02:13,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:02:13,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:02:13,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:02:13,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:02:13,980 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-18 20:02:13,980 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:02:13,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:02:13,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:02:13,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:02:13,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:02:13,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:02:13,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:02:13,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:02:13,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:02:13,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:02:13,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:02:13,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:02:13,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:02:13,985 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:02:13,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:02:13,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:02:13,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-11-18 20:02:14,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:02:14,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:02:14,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:02:14,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:02:14,325 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:02:14,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-18 20:02:14,426 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/data/d27eb0b69/f740e0281960489b9ec4a21634a45e9e/FLAG512902928 [2022-11-18 20:02:14,972 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:02:14,973 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-18 20:02:14,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/data/d27eb0b69/f740e0281960489b9ec4a21634a45e9e/FLAG512902928 [2022-11-18 20:02:15,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/data/d27eb0b69/f740e0281960489b9ec4a21634a45e9e [2022-11-18 20:02:15,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:02:15,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:02:15,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:02:15,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:02:15,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:02:15,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:15,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b316592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15, skipping insertion in model container [2022-11-18 20:02:15,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:15,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:02:15,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:02:15,732 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-18 20:02:15,736 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-18 20:02:15,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:02:15,794 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:02:15,855 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-18 20:02:15,860 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-18 20:02:15,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:02:15,930 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:02:15,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15 WrapperNode [2022-11-18 20:02:15,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:02:15,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:02:15,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:02:15,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:02:15,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:15,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,019 INFO L138 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 473 [2022-11-18 20:02:16,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:02:16,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:02:16,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:02:16,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:02:16,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,054 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:02:16,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:02:16,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:02:16,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:02:16,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (1/1) ... [2022-11-18 20:02:16,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:02:16,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:16,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:02:16,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691ad9e7-923d-4e25-93ea-92f559694032/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:02:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-11-18 20:02:16,158 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-11-18 20:02:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-11-18 20:02:16,158 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-11-18 20:02:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:02:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:02:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-11-18 20:02:16,159 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-11-18 20:02:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:02:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:02:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:02:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:02:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:02:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:02:16,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:02:16,162 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:02:16,367 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:02:16,370 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:02:17,080 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:02:17,477 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:02:17,478 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:02:17,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:02:17 BoogieIcfgContainer [2022-11-18 20:02:17,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:02:17,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:02:17,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:02:17,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:02:17,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:02:15" (1/3) ... [2022-11-18 20:02:17,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2342880e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:02:17, skipping insertion in model container [2022-11-18 20:02:17,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:02:15" (2/3) ... [2022-11-18 20:02:17,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2342880e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:02:17, skipping insertion in model container [2022-11-18 20:02:17,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:02:17" (3/3) ... [2022-11-18 20:02:17,493 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-11-18 20:02:17,505 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:02:17,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:02:17,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-18 20:02:17,517 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:02:17,717 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:02:17,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 341 transitions, 706 flow [2022-11-18 20:02:17,976 INFO L130 PetriNetUnfolder]: 18/338 cut-off events. [2022-11-18 20:02:17,977 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:02:17,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 18/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1054 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 284. Up to 4 conditions per place. [2022-11-18 20:02:17,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 341 transitions, 706 flow [2022-11-18 20:02:18,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 326 transitions, 667 flow [2022-11-18 20:02:18,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:02:18,036 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70220bb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:02:18,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-11-18 20:02:18,054 INFO L130 PetriNetUnfolder]: 1/45 cut-off events. [2022-11-18 20:02:18,055 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:02:18,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:18,056 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:18,057 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)] === [2022-11-18 20:02:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1551049427, now seen corresponding path program 1 times [2022-11-18 20:02:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:18,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737885986] [2022-11-18 20:02:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:18,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:18,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:18,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737885986] [2022-11-18 20:02:18,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737885986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:18,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:18,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:02:18,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821902306] [2022-11-18 20:02:18,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:18,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:02:18,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:02:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:02:18,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 341 [2022-11-18 20:02:18,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 326 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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) [2022-11-18 20:02:18,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:18,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 341 [2022-11-18 20:02:18,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:20,579 INFO L130 PetriNetUnfolder]: 1878/8465 cut-off events. [2022-11-18 20:02:20,580 INFO L131 PetriNetUnfolder]: For 439/439 co-relation queries the response was YES. [2022-11-18 20:02:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11195 conditions, 8465 events. 1878/8465 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 88546 event pairs, 550 based on Foata normal form. 565/7570 useless extension candidates. Maximal degree in co-relation 10826. Up to 1933 conditions per place. [2022-11-18 20:02:20,695 INFO L137 encePairwiseOnDemand]: 297/341 looper letters, 45 selfloop transitions, 8 changer transitions 0/315 dead transitions. [2022-11-18 20:02:20,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 315 transitions, 763 flow [2022-11-18 20:02:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:02:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:02:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 947 transitions. [2022-11-18 20:02:20,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9257086999022482 [2022-11-18 20:02:20,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 947 transitions. [2022-11-18 20:02:20,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 947 transitions. [2022-11-18 20:02:20,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:20,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 947 transitions. [2022-11-18 20:02:20,731 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) [2022-11-18 20:02:20,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:20,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:20,741 INFO L175 Difference]: Start difference. First operand has 318 places, 326 transitions, 667 flow. Second operand 3 states and 947 transitions. [2022-11-18 20:02:20,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 315 transitions, 763 flow [2022-11-18 20:02:20,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 315 transitions, 747 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:02:20,754 INFO L231 Difference]: Finished difference. Result has 289 places, 298 transitions, 650 flow [2022-11-18 20:02:20,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=650, PETRI_PLACES=289, PETRI_TRANSITIONS=298} [2022-11-18 20:02:20,759 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -29 predicate places. [2022-11-18 20:02:20,760 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 298 transitions, 650 flow [2022-11-18 20:02:20,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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) [2022-11-18 20:02:20,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:20,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:20,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:02:20,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-18 20:02:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1734250402, now seen corresponding path program 1 times [2022-11-18 20:02:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:20,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545519126] [2022-11-18 20:02:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:20,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545519126] [2022-11-18 20:02:20,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545519126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:20,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:20,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:02:20,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952434061] [2022-11-18 20:02:20,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:02:20,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:02:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:02:20,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-18 20:02:20,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 298 transitions, 650 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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) [2022-11-18 20:02:20,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:20,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-18 20:02:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:22,248 INFO L130 PetriNetUnfolder]: 1129/6182 cut-off events. [2022-11-18 20:02:22,249 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2022-11-18 20:02:22,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8086 conditions, 6182 events. 1129/6182 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 64785 event pairs, 445 based on Foata normal form. 0/5037 useless extension candidates. Maximal degree in co-relation 4219. Up to 1108 conditions per place. [2022-11-18 20:02:22,346 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 28 selfloop transitions, 4 changer transitions 0/308 dead transitions. [2022-11-18 20:02:22,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 308 transitions, 737 flow [2022-11-18 20:02:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:02:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:02:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-18 20:02:22,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-18 20:02:22,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-18 20:02:22,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-18 20:02:22,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:22,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-18 20:02:22,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 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) [2022-11-18 20:02:22,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:22,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:22,412 INFO L175 Difference]: Start difference. First operand has 289 places, 298 transitions, 650 flow. Second operand 3 states and 891 transitions. [2022-11-18 20:02:22,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 308 transitions, 737 flow [2022-11-18 20:02:22,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 308 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:02:22,426 INFO L231 Difference]: Finished difference. Result has 291 places, 301 transitions, 664 flow [2022-11-18 20:02:22,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=664, PETRI_PLACES=291, PETRI_TRANSITIONS=301} [2022-11-18 20:02:22,429 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -27 predicate places. [2022-11-18 20:02:22,429 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 301 transitions, 664 flow [2022-11-18 20:02:22,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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) [2022-11-18 20:02:22,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:22,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:02:22,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_reader1Err8ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-18 20:02:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash -308626095, now seen corresponding path program 1 times [2022-11-18 20:02:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:22,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275457044] [2022-11-18 20:02:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:22,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:22,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:22,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275457044] [2022-11-18 20:02:22,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275457044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:22,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:22,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:02:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791920134] [2022-11-18 20:02:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:22,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:02:22,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:22,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:02:22,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:02:22,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-18 20:02:22,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 301 transitions, 664 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 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) [2022-11-18 20:02:22,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:22,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-18 20:02:22,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:23,998 INFO L130 PetriNetUnfolder]: 1303/7779 cut-off events. [2022-11-18 20:02:23,998 INFO L131 PetriNetUnfolder]: For 308/328 co-relation queries the response was YES. [2022-11-18 20:02:24,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 7779 events. 1303/7779 cut-off events. For 308/328 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 86032 event pairs, 453 based on Foata normal form. 0/6377 useless extension candidates. Maximal degree in co-relation 3659. Up to 1263 conditions per place. [2022-11-18 20:02:24,096 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 30 selfloop transitions, 4 changer transitions 0/311 dead transitions. [2022-11-18 20:02:24,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 311 transitions, 757 flow [2022-11-18 20:02:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:02:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:02:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-18 20:02:24,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-18 20:02:24,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-18 20:02:24,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-18 20:02:24,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:24,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-18 20:02:24,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 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) [2022-11-18 20:02:24,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:24,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:24,106 INFO L175 Difference]: Start difference. First operand has 291 places, 301 transitions, 664 flow. Second operand 3 states and 891 transitions. [2022-11-18 20:02:24,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 311 transitions, 757 flow [2022-11-18 20:02:24,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 311 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:02:24,115 INFO L231 Difference]: Finished difference. Result has 293 places, 304 transitions, 688 flow [2022-11-18 20:02:24,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=688, PETRI_PLACES=293, PETRI_TRANSITIONS=304} [2022-11-18 20:02:24,116 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -25 predicate places. [2022-11-18 20:02:24,116 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 304 transitions, 688 flow [2022-11-18 20:02:24,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 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) [2022-11-18 20:02:24,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:24,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:02:24,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-18 20:02:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash 679080416, now seen corresponding path program 1 times [2022-11-18 20:02:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:24,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884352958] [2022-11-18 20:02:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:24,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:24,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884352958] [2022-11-18 20:02:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884352958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:24,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:24,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:02:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834637354] [2022-11-18 20:02:24,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:24,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:02:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:02:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:02:24,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 341 [2022-11-18 20:02:24,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 304 transitions, 688 flow. Second operand has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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) [2022-11-18 20:02:24,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:24,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 341 [2022-11-18 20:02:24,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:37,313 INFO L130 PetriNetUnfolder]: 29580/77461 cut-off events. [2022-11-18 20:02:37,314 INFO L131 PetriNetUnfolder]: For 1344/1428 co-relation queries the response was YES. [2022-11-18 20:02:37,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122335 conditions, 77461 events. 29580/77461 cut-off events. For 1344/1428 co-relation queries the response was YES. Maximal size of possible extension queue 2612. Compared 1028067 event pairs, 8691 based on Foata normal form. 0/65326 useless extension candidates. Maximal degree in co-relation 72058. Up to 21737 conditions per place. [2022-11-18 20:02:38,484 INFO L137 encePairwiseOnDemand]: 334/341 looper letters, 143 selfloop transitions, 17 changer transitions 0/414 dead transitions. [2022-11-18 20:02:38,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 414 transitions, 1278 flow [2022-11-18 20:02:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:02:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 20:02:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1699 transitions. [2022-11-18 20:02:38,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8304007820136853 [2022-11-18 20:02:38,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1699 transitions. [2022-11-18 20:02:38,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1699 transitions. [2022-11-18 20:02:38,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:38,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1699 transitions. [2022-11-18 20:02:38,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.1666666666667) internal successors, (1699), 6 states have internal predecessors, (1699), 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) [2022-11-18 20:02:38,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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) [2022-11-18 20:02:38,506 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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) [2022-11-18 20:02:38,507 INFO L175 Difference]: Start difference. First operand has 293 places, 304 transitions, 688 flow. Second operand 6 states and 1699 transitions. [2022-11-18 20:02:38,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 414 transitions, 1278 flow [2022-11-18 20:02:38,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 414 transitions, 1252 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-18 20:02:38,530 INFO L231 Difference]: Finished difference. Result has 301 places, 320 transitions, 826 flow [2022-11-18 20:02:38,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=826, PETRI_PLACES=301, PETRI_TRANSITIONS=320} [2022-11-18 20:02:38,533 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -17 predicate places. [2022-11-18 20:02:38,533 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 320 transitions, 826 flow [2022-11-18 20:02:38,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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) [2022-11-18 20:02:38,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:38,536 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:38,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:02:38,536 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-18 20:02:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -257020397, now seen corresponding path program 1 times [2022-11-18 20:02:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557585255] [2022-11-18 20:02:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:38,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:38,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557585255] [2022-11-18 20:02:38,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557585255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:38,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:38,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:02:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642829382] [2022-11-18 20:02:38,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:38,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:02:38,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:02:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:02:38,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-18 20:02:38,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 320 transitions, 826 flow. Second operand has 3 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 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) [2022-11-18 20:02:38,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:38,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-18 20:02:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:02:47,221 INFO L130 PetriNetUnfolder]: 8821/62944 cut-off events. [2022-11-18 20:02:47,221 INFO L131 PetriNetUnfolder]: For 5722/5815 co-relation queries the response was YES. [2022-11-18 20:02:47,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80952 conditions, 62944 events. 8821/62944 cut-off events. For 5722/5815 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 1065625 event pairs, 3026 based on Foata normal form. 0/50900 useless extension candidates. Maximal degree in co-relation 54198. Up to 8616 conditions per place. [2022-11-18 20:02:47,886 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 42 selfloop transitions, 18 changer transitions 0/344 dead transitions. [2022-11-18 20:02:47,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 344 transitions, 1091 flow [2022-11-18 20:02:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:02:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:02:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-18 20:02:47,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-18 20:02:47,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-18 20:02:47,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-18 20:02:47,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:02:47,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-18 20:02:47,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 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) [2022-11-18 20:02:47,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:47,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:02:47,902 INFO L175 Difference]: Start difference. First operand has 301 places, 320 transitions, 826 flow. Second operand 3 states and 891 transitions. [2022-11-18 20:02:47,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 344 transitions, 1091 flow [2022-11-18 20:02:47,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 344 transitions, 1091 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:02:47,933 INFO L231 Difference]: Finished difference. Result has 305 places, 337 transitions, 1062 flow [2022-11-18 20:02:47,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1062, PETRI_PLACES=305, PETRI_TRANSITIONS=337} [2022-11-18 20:02:47,936 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -13 predicate places. [2022-11-18 20:02:47,936 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 337 transitions, 1062 flow [2022-11-18 20:02:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 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) [2022-11-18 20:02:47,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:02:47,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:47,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:02:47,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-18 20:02:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash 461196087, now seen corresponding path program 1 times [2022-11-18 20:02:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:02:47,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628917661] [2022-11-18 20:02:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:02:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:48,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:02:48,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628917661] [2022-11-18 20:02:48,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628917661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:48,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:48,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:02:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655091966] [2022-11-18 20:02:48,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:48,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:02:48,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:02:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:02:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:02:48,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-11-18 20:02:48,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 337 transitions, 1062 flow. Second operand has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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) [2022-11-18 20:02:48,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:02:48,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-11-18 20:02:48,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand