./Ultimate.py --spec /storage/repos/ultimate/trunk/examples/svcomp/properties/no-data-race.prp --file /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version efd9311c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 --- This is Ultimate 0.2.2-dev-efd9311-m [2022-04-18 15:51:59,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-18 15:51:59,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-18 15:51:59,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-18 15:51:59,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-18 15:51:59,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-18 15:51:59,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-18 15:51:59,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-18 15:51:59,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-18 15:51:59,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-18 15:51:59,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-18 15:51:59,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-18 15:51:59,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-18 15:51:59,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-18 15:51:59,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-18 15:51:59,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-18 15:51:59,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-18 15:51:59,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-18 15:51:59,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-18 15:51:59,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-18 15:51:59,739 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-18 15:51:59,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-18 15:51:59,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-18 15:51:59,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-18 15:51:59,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-18 15:51:59,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-18 15:51:59,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-18 15:51:59,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-18 15:51:59,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-18 15:51:59,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-18 15:51:59,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-18 15:51:59,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-18 15:51:59,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-18 15:51:59,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-18 15:51:59,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-18 15:51:59,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-18 15:51:59,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-18 15:51:59,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-18 15:51:59,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-18 15:51:59,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-18 15:51:59,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-18 15:51:59,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-18 15:51:59,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2022-04-18 15:51:59,795 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-18 15:51:59,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-18 15:51:59,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-18 15:51:59,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-18 15:51:59,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-18 15:51:59,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-18 15:51:59,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-18 15:51:59,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-18 15:51:59,798 INFO L138 SettingsManager]: * Use SBE=true [2022-04-18 15:51:59,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-18 15:51:59,799 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-18 15:51:59,799 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-04-18 15:51:59,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-18 15:51:59,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-18 15:51:59,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-18 15:51:59,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-18 15:51:59,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-18 15:51:59,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-18 15:51:59,800 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-04-18 15:51:59,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-18 15:51:59,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-18 15:51:59,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-18 15:51:59,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-18 15:51:59,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-18 15:51:59,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-18 15:51:59,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-18 15:51:59,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 15:51:59,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-18 15:51:59,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-18 15:51:59,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-18 15:51:59,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-18 15:51:59,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-18 15:51:59,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-18 15:51:59,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-18 15:51:59,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-18 15:51:59,804 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-04-18 15:52:00,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-18 15:52:00,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-18 15:52:00,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-18 15:52:00,059 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-18 15:52:00,063 INFO L275 PluginConnector]: CDTParser initialized [2022-04-18 15:52:00,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i [2022-04-18 15:52:00,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca020ade/743ceea0afd040519c5f65d41b37d756/FLAGe05a0e354 [2022-04-18 15:52:00,586 INFO L306 CDTParser]: Found 1 translation units. [2022-04-18 15:52:00,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i [2022-04-18 15:52:00,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca020ade/743ceea0afd040519c5f65d41b37d756/FLAGe05a0e354 [2022-04-18 15:52:01,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca020ade/743ceea0afd040519c5f65d41b37d756 [2022-04-18 15:52:01,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-18 15:52:01,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-04-18 15:52:01,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-18 15:52:01,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-18 15:52:01,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-18 15:52:01,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e827ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01, skipping insertion in model container [2022-04-18 15:52:01,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-18 15:52:01,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-18 15:52:01,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i[30694,30707] [2022-04-18 15:52:01,483 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i[30916,30929] [2022-04-18 15:52:01,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 15:52:01,529 INFO L203 MainTranslator]: Completed pre-run [2022-04-18 15:52:01,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i[30694,30707] [2022-04-18 15:52:01,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-1.i[30916,30929] [2022-04-18 15:52:01,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 15:52:01,653 INFO L208 MainTranslator]: Completed translation [2022-04-18 15:52:01,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01 WrapperNode [2022-04-18 15:52:01,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-18 15:52:01,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-04-18 15:52:01,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-04-18 15:52:01,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-04-18 15:52:01,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,737 INFO L137 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 473 [2022-04-18 15:52:01,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-04-18 15:52:01,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-18 15:52:01,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-18 15:52:01,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-18 15:52:01,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-18 15:52:01,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-18 15:52:01,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-18 15:52:01,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-18 15:52:01,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (1/1) ... [2022-04-18 15:52:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 15:52:01,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-18 15:52:01,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-18 15:52:01,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-18 15:52:01,885 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-04-18 15:52:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-04-18 15:52:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-04-18 15:52:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-04-18 15:52:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-18 15:52:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-18 15:52:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-04-18 15:52:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-04-18 15:52:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-04-18 15:52:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-18 15:52:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-18 15:52:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-18 15:52:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-18 15:52:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-18 15:52:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-18 15:52:01,889 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-04-18 15:52:02,039 INFO L234 CfgBuilder]: Building ICFG [2022-04-18 15:52:02,040 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-18 15:52:02,593 INFO L275 CfgBuilder]: Performing block encoding [2022-04-18 15:52:02,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-18 15:52:02,808 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-18 15:52:02,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:52:02 BoogieIcfgContainer [2022-04-18 15:52:02,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-18 15:52:02,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-18 15:52:02,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-18 15:52:02,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-18 15:52:02,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:52:01" (1/3) ... [2022-04-18 15:52:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7018700b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:52:02, skipping insertion in model container [2022-04-18 15:52:02,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:52:01" (2/3) ... [2022-04-18 15:52:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7018700b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:52:02, skipping insertion in model container [2022-04-18 15:52:02,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:52:02" (3/3) ... [2022-04-18 15:52:02,818 INFO L111 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-04-18 15:52:02,822 WARN L147 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-04-18 15:52:02,822 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-18 15:52:02,822 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-04-18 15:52:02,822 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-04-18 15:52:02,938 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-04-18 15:52:02,991 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 15:52:02,998 INFO L340 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 [2022-04-18 15:52:02,998 INFO L341 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-04-18 15:52:03,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 333 places, 341 transitions, 706 flow [2022-04-18 15:52:03,170 INFO L129 PetriNetUnfolder]: 18/338 cut-off events. [2022-04-18 15:52:03,185 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-04-18 15:52:03,197 INFO L84 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 1050 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. [2022-04-18 15:52:03,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 341 transitions, 706 flow [2022-04-18 15:52:03,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 326 transitions, 667 flow [2022-04-18 15:52:03,213 INFO L129 PetriNetUnfolder]: 1/45 cut-off events. [2022-04-18 15:52:03,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-04-18 15:52:03,214 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:03,214 INFO L255 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] [2022-04-18 15:52:03,215 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1084406491, now seen corresponding path program 1 times [2022-04-18 15:52:03,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:03,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298875357] [2022-04-18 15:52:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298875357] [2022-04-18 15:52:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298875357] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:03,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:03,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 15:52:03,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457457237] [2022-04-18 15:52:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:03,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 15:52:03,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 15:52:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 15:52:03,438 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 341 [2022-04-18 15:52:03,442 INFO L92 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) [2022-04-18 15:52:03,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:03,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 341 [2022-04-18 15:52:03,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-04-18 15:52:04,936 INFO L129 PetriNetUnfolder]: 1878/8465 cut-off events. [2022-04-18 15:52:04,937 INFO L130 PetriNetUnfolder]: For 439/439 co-relation queries the response was YES. [2022-04-18 15:52:04,981 INFO L84 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 88782 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. [2022-04-18 15:52:05,046 INFO L132 encePairwiseOnDemand]: 297/341 looper letters, 45 selfloop transitions, 8 changer transitions 0/315 dead transitions. [2022-04-18 15:52:05,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 315 transitions, 763 flow [2022-04-18 15:52:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 15:52:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-04-18 15:52:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 947 transitions. [2022-04-18 15:52:05,066 INFO L547 CegarLoopForPetriNet]: DFA transition density 0.9257086999022482 [2022-04-18 15:52:05,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 947 transitions. [2022-04-18 15:52:05,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 947 transitions. [2022-04-18 15:52:05,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-04-18 15:52:05,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 947 transitions. [2022-04-18 15:52:05,079 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) [2022-04-18 15:52:05,087 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) [2022-04-18 15:52:05,088 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) [2022-04-18 15:52:05,089 INFO L186 Difference]: Start difference. First operand has 318 places, 326 transitions, 667 flow. Second operand 3 states and 947 transitions. [2022-04-18 15:52:05,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 315 transitions, 763 flow [2022-04-18 15:52:05,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 315 transitions, 747 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-04-18 15:52:05,109 INFO L242 Difference]: Finished difference. Result has 289 places, 298 transitions, 650 flow [2022-04-18 15:52:05,112 INFO L318 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} [2022-04-18 15:52:05,119 INFO L335 CegarLoopForPetriNet]: 318 programPoint places, -29 predicate places. [2022-04-18 15:52:05,119 INFO L478 AbstractCegarLoop]: Abstraction has has 289 places, 298 transitions, 650 flow [2022-04-18 15:52:05,120 INFO L479 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) [2022-04-18 15:52:05,121 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:05,121 INFO L255 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] [2022-04-18 15:52:05,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-18 15:52:05,122 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash 92635290, now seen corresponding path program 1 times [2022-04-18 15:52:05,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:05,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004881498] [2022-04-18 15:52:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:05,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:05,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004881498] [2022-04-18 15:52:05,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004881498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:05,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:05,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 15:52:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283066073] [2022-04-18 15:52:05,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:05,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 15:52:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 15:52:05,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 15:52:05,280 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-04-18 15:52:05,281 INFO L92 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) [2022-04-18 15:52:05,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:05,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-04-18 15:52:05,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-04-18 15:52:06,309 INFO L129 PetriNetUnfolder]: 1129/6182 cut-off events. [2022-04-18 15:52:06,310 INFO L130 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2022-04-18 15:52:06,354 INFO L84 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 64988 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. [2022-04-18 15:52:06,389 INFO L132 encePairwiseOnDemand]: 336/341 looper letters, 28 selfloop transitions, 4 changer transitions 0/308 dead transitions. [2022-04-18 15:52:06,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 308 transitions, 737 flow [2022-04-18 15:52:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 15:52:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-04-18 15:52:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-04-18 15:52:06,392 INFO L547 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-04-18 15:52:06,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-04-18 15:52:06,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-04-18 15:52:06,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-04-18 15:52:06,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-04-18 15:52:06,396 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) [2022-04-18 15:52:06,400 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) [2022-04-18 15:52:06,401 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) [2022-04-18 15:52:06,401 INFO L186 Difference]: Start difference. First operand has 289 places, 298 transitions, 650 flow. Second operand 3 states and 891 transitions. [2022-04-18 15:52:06,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 308 transitions, 737 flow [2022-04-18 15:52:06,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 308 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-04-18 15:52:06,410 INFO L242 Difference]: Finished difference. Result has 291 places, 301 transitions, 664 flow [2022-04-18 15:52:06,411 INFO L318 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} [2022-04-18 15:52:06,412 INFO L335 CegarLoopForPetriNet]: 318 programPoint places, -27 predicate places. [2022-04-18 15:52:06,412 INFO L478 AbstractCegarLoop]: Abstraction has has 291 places, 301 transitions, 664 flow [2022-04-18 15:52:06,413 INFO L479 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) [2022-04-18 15:52:06,413 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:06,413 INFO L255 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] [2022-04-18 15:52:06,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-18 15:52:06,414 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_reader1Err8ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1769711449, now seen corresponding path program 1 times [2022-04-18 15:52:06,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005624545] [2022-04-18 15:52:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:06,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:06,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005624545] [2022-04-18 15:52:06,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005624545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:06,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:06,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 15:52:06,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354753890] [2022-04-18 15:52:06,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:06,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 15:52:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 15:52:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 15:52:06,491 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-04-18 15:52:06,493 INFO L92 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) [2022-04-18 15:52:06,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:06,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-04-18 15:52:06,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-04-18 15:52:07,704 INFO L129 PetriNetUnfolder]: 1303/7779 cut-off events. [2022-04-18 15:52:07,705 INFO L130 PetriNetUnfolder]: For 308/328 co-relation queries the response was YES. [2022-04-18 15:52:07,776 INFO L84 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 86375 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. [2022-04-18 15:52:07,830 INFO L132 encePairwiseOnDemand]: 336/341 looper letters, 30 selfloop transitions, 4 changer transitions 0/311 dead transitions. [2022-04-18 15:52:07,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 311 transitions, 757 flow [2022-04-18 15:52:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 15:52:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-04-18 15:52:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-04-18 15:52:07,834 INFO L547 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-04-18 15:52:07,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-04-18 15:52:07,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-04-18 15:52:07,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-04-18 15:52:07,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-04-18 15:52:07,837 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) [2022-04-18 15:52:07,839 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) [2022-04-18 15:52:07,840 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) [2022-04-18 15:52:07,840 INFO L186 Difference]: Start difference. First operand has 291 places, 301 transitions, 664 flow. Second operand 3 states and 891 transitions. [2022-04-18 15:52:07,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 311 transitions, 757 flow [2022-04-18 15:52:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 311 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-04-18 15:52:07,848 INFO L242 Difference]: Finished difference. Result has 293 places, 304 transitions, 688 flow [2022-04-18 15:52:07,849 INFO L318 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} [2022-04-18 15:52:07,850 INFO L335 CegarLoopForPetriNet]: 318 programPoint places, -25 predicate places. [2022-04-18 15:52:07,850 INFO L478 AbstractCegarLoop]: Abstraction has has 293 places, 304 transitions, 688 flow [2022-04-18 15:52:07,851 INFO L479 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) [2022-04-18 15:52:07,851 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:07,851 INFO L255 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] [2022-04-18 15:52:07,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-18 15:52:07,852 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1666764841, now seen corresponding path program 1 times [2022-04-18 15:52:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:07,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376035240] [2022-04-18 15:52:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376035240] [2022-04-18 15:52:07,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376035240] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:07,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:07,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-18 15:52:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732846704] [2022-04-18 15:52:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:07,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-18 15:52:07,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-18 15:52:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-18 15:52:07,997 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 341 [2022-04-18 15:52:07,999 INFO L92 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) [2022-04-18 15:52:07,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:07,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 341 [2022-04-18 15:52:07,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-04-18 15:52:16,962 INFO L129 PetriNetUnfolder]: 29602/77551 cut-off events. [2022-04-18 15:52:16,962 INFO L130 PetriNetUnfolder]: For 1332/1416 co-relation queries the response was YES. [2022-04-18 15:52:17,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122419 conditions, 77551 events. 29602/77551 cut-off events. For 1332/1416 co-relation queries the response was YES. Maximal size of possible extension queue 2612. Compared 1029658 event pairs, 8691 based on Foata normal form. 0/65382 useless extension candidates. Maximal degree in co-relation 72058. Up to 21724 conditions per place. [2022-04-18 15:52:17,807 INFO L132 encePairwiseOnDemand]: 334/341 looper letters, 143 selfloop transitions, 17 changer transitions 0/414 dead transitions. [2022-04-18 15:52:17,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 414 transitions, 1278 flow [2022-04-18 15:52:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-18 15:52:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-04-18 15:52:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1699 transitions. [2022-04-18 15:52:17,814 INFO L547 CegarLoopForPetriNet]: DFA transition density 0.8304007820136853 [2022-04-18 15:52:17,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1699 transitions. [2022-04-18 15:52:17,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1699 transitions. [2022-04-18 15:52:17,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-04-18 15:52:17,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1699 transitions. [2022-04-18 15:52:17,819 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) [2022-04-18 15:52:17,825 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) [2022-04-18 15:52:17,827 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) [2022-04-18 15:52:17,827 INFO L186 Difference]: Start difference. First operand has 293 places, 304 transitions, 688 flow. Second operand 6 states and 1699 transitions. [2022-04-18 15:52:17,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 414 transitions, 1278 flow [2022-04-18 15:52:17,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 414 transitions, 1252 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-04-18 15:52:17,853 INFO L242 Difference]: Finished difference. Result has 301 places, 320 transitions, 826 flow [2022-04-18 15:52:17,854 INFO L318 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} [2022-04-18 15:52:17,855 INFO L335 CegarLoopForPetriNet]: 318 programPoint places, -17 predicate places. [2022-04-18 15:52:17,856 INFO L478 AbstractCegarLoop]: Abstraction has has 301 places, 320 transitions, 826 flow [2022-04-18 15:52:17,858 INFO L479 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) [2022-04-18 15:52:17,858 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:17,858 INFO L255 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] [2022-04-18 15:52:17,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-18 15:52:17,859 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 157454603, now seen corresponding path program 1 times [2022-04-18 15:52:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:17,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477131393] [2022-04-18 15:52:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477131393] [2022-04-18 15:52:17,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477131393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:17,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:17,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 15:52:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792445834] [2022-04-18 15:52:17,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:17,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 15:52:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 15:52:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 15:52:17,917 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-04-18 15:52:17,918 INFO L92 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) [2022-04-18 15:52:17,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:17,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-04-18 15:52:17,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-04-18 15:52:24,328 INFO L129 PetriNetUnfolder]: 8821/62944 cut-off events. [2022-04-18 15:52:24,328 INFO L130 PetriNetUnfolder]: For 5505/5598 co-relation queries the response was YES. [2022-04-18 15:52:24,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80952 conditions, 62944 events. 8821/62944 cut-off events. For 5505/5598 co-relation queries the response was YES. Maximal size of possible extension queue 1725. Compared 1065875 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. [2022-04-18 15:52:24,922 INFO L132 encePairwiseOnDemand]: 336/341 looper letters, 42 selfloop transitions, 18 changer transitions 0/344 dead transitions. [2022-04-18 15:52:24,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 344 transitions, 1091 flow [2022-04-18 15:52:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 15:52:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-04-18 15:52:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-04-18 15:52:24,925 INFO L547 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-04-18 15:52:24,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-04-18 15:52:24,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-04-18 15:52:24,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-04-18 15:52:24,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-04-18 15:52:24,928 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) [2022-04-18 15:52:24,930 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) [2022-04-18 15:52:24,931 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) [2022-04-18 15:52:24,931 INFO L186 Difference]: Start difference. First operand has 301 places, 320 transitions, 826 flow. Second operand 3 states and 891 transitions. [2022-04-18 15:52:24,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 344 transitions, 1091 flow [2022-04-18 15:52:24,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 344 transitions, 1091 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-04-18 15:52:24,947 INFO L242 Difference]: Finished difference. Result has 305 places, 337 transitions, 1062 flow [2022-04-18 15:52:24,947 INFO L318 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} [2022-04-18 15:52:24,948 INFO L335 CegarLoopForPetriNet]: 318 programPoint places, -13 predicate places. [2022-04-18 15:52:24,948 INFO L478 AbstractCegarLoop]: Abstraction has has 305 places, 337 transitions, 1062 flow [2022-04-18 15:52:24,949 INFO L479 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) [2022-04-18 15:52:24,949 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:24,949 INFO L255 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] [2022-04-18 15:52:24,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-18 15:52:24,950 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1452606722, now seen corresponding path program 1 times [2022-04-18 15:52:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530247378] [2022-04-18 15:52:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:25,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530247378] [2022-04-18 15:52:25,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530247378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:25,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:25,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 15:52:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723459796] [2022-04-18 15:52:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:25,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 15:52:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 15:52:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 15:52:25,009 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-04-18 15:52:25,010 INFO L92 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) [2022-04-18 15:52:25,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:25,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-04-18 15:52:25,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-04-18 15:52:38,529 INFO L129 PetriNetUnfolder]: 20777/121988 cut-off events. [2022-04-18 15:52:38,530 INFO L130 PetriNetUnfolder]: For 7271/7318 co-relation queries the response was YES. [2022-04-18 15:52:39,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172799 conditions, 121988 events. 20777/121988 cut-off events. For 7271/7318 co-relation queries the response was YES. Maximal size of possible extension queue 3630. Compared 2200391 event pairs, 4091 based on Foata normal form. 0/104296 useless extension candidates. Maximal degree in co-relation 108951. Up to 20430 conditions per place. [2022-04-18 15:52:40,005 INFO L132 encePairwiseOnDemand]: 314/341 looper letters, 74 selfloop transitions, 20 changer transitions 0/361 dead transitions. [2022-04-18 15:52:40,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 361 transitions, 1300 flow [2022-04-18 15:52:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 15:52:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-04-18 15:52:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2022-04-18 15:52:40,008 INFO L547 CegarLoopForPetriNet]: DFA transition density 0.8533724340175953 [2022-04-18 15:52:40,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2022-04-18 15:52:40,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2022-04-18 15:52:40,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-04-18 15:52:40,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2022-04-18 15:52:40,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2022-04-18 15:52:40,013 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) [2022-04-18 15:52:40,014 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) [2022-04-18 15:52:40,014 INFO L186 Difference]: Start difference. First operand has 305 places, 337 transitions, 1062 flow. Second operand 3 states and 873 transitions. [2022-04-18 15:52:40,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 361 transitions, 1300 flow [2022-04-18 15:52:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 361 transitions, 1264 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-04-18 15:52:40,097 INFO L242 Difference]: Finished difference. Result has 307 places, 355 transitions, 1192 flow [2022-04-18 15:52:40,098 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1192, PETRI_PLACES=307, PETRI_TRANSITIONS=355} [2022-04-18 15:52:40,100 INFO L335 CegarLoopForPetriNet]: 318 programPoint places, -11 predicate places. [2022-04-18 15:52:40,101 INFO L478 AbstractCegarLoop]: Abstraction has has 307 places, 355 transitions, 1192 flow [2022-04-18 15:52:40,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-04-18 15:52:40,101 INFO L247 CegarLoopForPetriNet]: Found error trace [2022-04-18 15:52:40,102 INFO L255 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] [2022-04-18 15:52:40,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-18 15:52:40,102 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting qrcu_updaterErr6ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-04-18 15:52:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 15:52:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1452575937, now seen corresponding path program 1 times [2022-04-18 15:52:40,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-18 15:52:40,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075116983] [2022-04-18 15:52:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 15:52:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 15:52:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 15:52:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 15:52:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-18 15:52:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075116983] [2022-04-18 15:52:40,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075116983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 15:52:40,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 15:52:40,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 15:52:40,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415953851] [2022-04-18 15:52:40,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 15:52:40,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 15:52:40,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-18 15:52:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 15:52:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 15:52:40,168 INFO L502 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-04-18 15:52:40,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 355 transitions, 1192 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) [2022-04-18 15:52:40,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-04-18 15:52:40,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-04-18 15:52:40,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand