./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN --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-6b4ec56 [2022-11-20 11:25:44,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:25:44,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:25:44,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:25:44,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:25:44,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:25:44,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:25:44,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:25:44,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:25:44,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:25:44,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:25:44,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:25:44,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:25:44,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:25:44,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:25:44,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:25:44,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:25:44,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:25:44,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:25:44,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:25:44,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:25:44,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:25:44,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:25:44,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:25:44,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:25:44,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:25:44,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:25:44,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:25:44,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:25:44,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:25:44,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:25:44,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:25:44,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:25:44,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:25:44,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:25:44,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:25:44,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:25:44,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:25:44,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:25:44,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:25:44,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:25:44,954 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/config/svcomp-DataRace-32bit-Automizer_Default.epf [2022-11-20 11:25:44,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:25:44,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:25:44,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:25:44,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:25:44,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:25:44,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:25:44,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:25:44,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:25:44,987 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:25:44,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:25:44,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:25:44,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:25:44,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:25:44,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:25:44,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:25:44,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:25:44,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:25:44,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:25:44,990 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-20 11:25:44,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:25:44,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:25:44,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:25:44,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:25:44,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:25:44,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:25:44,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:25:44,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:25:44,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:25:44,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:25:44,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:25:44,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:25:44,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:25:44,995 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:25:44,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:25:44,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:25:44,995 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_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-11-20 11:25:45,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:25:45,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:25:45,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:25:45,359 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:25:45,359 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:25:45,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-20 11:25:49,110 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:25:49,423 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:25:49,424 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-20 11:25:49,441 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/data/cea4352be/cbbd1e19fd864250a1eb7094f555c832/FLAG939994d94 [2022-11-20 11:25:49,461 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/data/cea4352be/cbbd1e19fd864250a1eb7094f555c832 [2022-11-20 11:25:49,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:25:49,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:25:49,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:25:49,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:25:49,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:25:49,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:25:49" (1/1) ... [2022-11-20 11:25:49,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f21a78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:49, skipping insertion in model container [2022-11-20 11:25:49,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:25:49" (1/1) ... [2022-11-20 11:25:49,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:25:49,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:25:49,975 WARN L237 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_7c883f98-68f6-4429-bfc5-3584cebdb871/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-20 11:25:49,978 WARN L237 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_7c883f98-68f6-4429-bfc5-3584cebdb871/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-20 11:25:50,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:25:50,059 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:25:50,142 WARN L237 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_7c883f98-68f6-4429-bfc5-3584cebdb871/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-20 11:25:50,151 WARN L237 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_7c883f98-68f6-4429-bfc5-3584cebdb871/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-20 11:25:50,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:25:50,239 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:25:50,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50 WrapperNode [2022-11-20 11:25:50,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:25:50,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:25:50,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:25:50,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:25:50,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,321 INFO L138 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 473 [2022-11-20 11:25:50,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:25:50,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:25:50,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:25:50,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:25:50,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,371 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:25:50,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:25:50,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:25:50,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:25:50,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (1/1) ... [2022-11-20 11:25:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:25:50,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:50,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:25:50,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c883f98-68f6-4429-bfc5-3584cebdb871/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:25:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-11-20 11:25:50,503 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-11-20 11:25:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-11-20 11:25:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-11-20 11:25:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:25:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:25:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-11-20 11:25:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-11-20 11:25:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:25:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:25:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:25:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:25:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:25:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:25:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:25:50,516 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:25:50,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:25:50,711 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:25:51,748 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:25:52,155 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:25:52,155 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:25:52,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:25:52 BoogieIcfgContainer [2022-11-20 11:25:52,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:25:52,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:25:52,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:25:52,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:25:52,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:25:49" (1/3) ... [2022-11-20 11:25:52,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b558334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:25:52, skipping insertion in model container [2022-11-20 11:25:52,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:25:50" (2/3) ... [2022-11-20 11:25:52,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b558334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:25:52, skipping insertion in model container [2022-11-20 11:25:52,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:25:52" (3/3) ... [2022-11-20 11:25:52,177 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-11-20 11:25:52,189 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:25:52,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:25:52,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-20 11:25:52,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:25:52,423 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:25:52,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 341 transitions, 706 flow [2022-11-20 11:25:52,801 INFO L130 PetriNetUnfolder]: 18/338 cut-off events. [2022-11-20 11:25:52,801 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:25:52,815 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 1056 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. [2022-11-20 11:25:52,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 341 transitions, 706 flow [2022-11-20 11:25:52,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 326 transitions, 667 flow [2022-11-20 11:25:52,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:25:52,848 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;@491d3bdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:25:52,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-11-20 11:25:52,859 INFO L130 PetriNetUnfolder]: 1/45 cut-off events. [2022-11-20 11:25:52,860 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:25:52,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:25:52,861 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] [2022-11-20 11:25:52,861 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)] === [2022-11-20 11:25:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1084406491, now seen corresponding path program 1 times [2022-11-20 11:25:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:52,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981885960] [2022-11-20 11:25:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:52,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:53,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981885960] [2022-11-20 11:25:53,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981885960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:53,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:53,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:25:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097840750] [2022-11-20 11:25:53,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:53,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:53,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:25:53,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 341 [2022-11-20 11:25:53,361 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) [2022-11-20 11:25:53,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:25:53,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 341 [2022-11-20 11:25:53,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:25:56,161 INFO L130 PetriNetUnfolder]: 1878/8395 cut-off events. [2022-11-20 11:25:56,161 INFO L131 PetriNetUnfolder]: For 439/439 co-relation queries the response was YES. [2022-11-20 11:25:56,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11124 conditions, 8395 events. 1878/8395 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 87579 event pairs, 529 based on Foata normal form. 563/7503 useless extension candidates. Maximal degree in co-relation 9159. Up to 1932 conditions per place. [2022-11-20 11:25:56,320 INFO L137 encePairwiseOnDemand]: 297/341 looper letters, 45 selfloop transitions, 8 changer transitions 0/315 dead transitions. [2022-11-20 11:25:56,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 315 transitions, 763 flow [2022-11-20 11:25:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:25:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:25:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 947 transitions. [2022-11-20 11:25:56,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9257086999022482 [2022-11-20 11:25:56,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 947 transitions. [2022-11-20 11:25:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 947 transitions. [2022-11-20 11:25:56,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:25:56,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 947 transitions. [2022-11-20 11:25:56,369 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) [2022-11-20 11:25:56,380 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) [2022-11-20 11:25:56,382 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) [2022-11-20 11:25:56,384 INFO L175 Difference]: Start difference. First operand has 318 places, 326 transitions, 667 flow. Second operand 3 states and 947 transitions. [2022-11-20 11:25:56,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 315 transitions, 763 flow [2022-11-20 11:25:56,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 315 transitions, 747 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:25:56,409 INFO L231 Difference]: Finished difference. Result has 289 places, 298 transitions, 650 flow [2022-11-20 11:25:56,412 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} [2022-11-20 11:25:56,419 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -29 predicate places. [2022-11-20 11:25:56,419 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 298 transitions, 650 flow [2022-11-20 11:25:56,420 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) [2022-11-20 11:25:56,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:25:56,421 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] [2022-11-20 11:25:56,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:25:56,422 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)] === [2022-11-20 11:25:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash 92635290, now seen corresponding path program 1 times [2022-11-20 11:25:56,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746136760] [2022-11-20 11:25:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:56,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:56,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:56,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746136760] [2022-11-20 11:25:56,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746136760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:56,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:56,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:25:56,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725626668] [2022-11-20 11:25:56,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:56,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:56,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:56,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:25:56,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-20 11:25:56,627 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) [2022-11-20 11:25:56,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:25:56,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-20 11:25:56,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:25:58,439 INFO L130 PetriNetUnfolder]: 1129/6182 cut-off events. [2022-11-20 11:25:58,440 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2022-11-20 11:25:58,509 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 64874 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. [2022-11-20 11:25:58,563 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 28 selfloop transitions, 4 changer transitions 0/308 dead transitions. [2022-11-20 11:25:58,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 308 transitions, 737 flow [2022-11-20 11:25:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:25:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:25:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-20 11:25:58,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-20 11:25:58,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-20 11:25:58,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-20 11:25:58,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:25:58,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-20 11:25:58,574 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) [2022-11-20 11:25:58,577 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) [2022-11-20 11:25:58,579 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) [2022-11-20 11:25:58,580 INFO L175 Difference]: Start difference. First operand has 289 places, 298 transitions, 650 flow. Second operand 3 states and 891 transitions. [2022-11-20 11:25:58,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 308 transitions, 737 flow [2022-11-20 11:25:58,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 308 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:25:58,600 INFO L231 Difference]: Finished difference. Result has 291 places, 301 transitions, 664 flow [2022-11-20 11:25:58,602 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} [2022-11-20 11:25:58,604 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -27 predicate places. [2022-11-20 11:25:58,605 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 301 transitions, 664 flow [2022-11-20 11:25:58,606 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) [2022-11-20 11:25:58,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:25:58,606 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] [2022-11-20 11:25:58,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:25:58,607 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)] === [2022-11-20 11:25:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1769711449, now seen corresponding path program 1 times [2022-11-20 11:25:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:58,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834744589] [2022-11-20 11:25:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834744589] [2022-11-20 11:25:58,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834744589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:58,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:58,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:25:58,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635066208] [2022-11-20 11:25:58,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:58,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:58,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:25:58,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-20 11:25:58,784 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) [2022-11-20 11:25:58,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:25:58,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-20 11:25:58,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:26:00,851 INFO L130 PetriNetUnfolder]: 1303/7779 cut-off events. [2022-11-20 11:26:00,851 INFO L131 PetriNetUnfolder]: For 308/328 co-relation queries the response was YES. [2022-11-20 11:26:00,911 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 209. Compared 85900 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. [2022-11-20 11:26:00,964 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 30 selfloop transitions, 4 changer transitions 0/311 dead transitions. [2022-11-20 11:26:00,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 311 transitions, 757 flow [2022-11-20 11:26:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:26:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:26:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-20 11:26:00,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-20 11:26:00,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-20 11:26:00,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-20 11:26:00,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:26:00,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-20 11:26:00,973 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) [2022-11-20 11:26:00,976 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) [2022-11-20 11:26:00,978 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) [2022-11-20 11:26:00,978 INFO L175 Difference]: Start difference. First operand has 291 places, 301 transitions, 664 flow. Second operand 3 states and 891 transitions. [2022-11-20 11:26:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 311 transitions, 757 flow [2022-11-20 11:26:00,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 311 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:26:00,988 INFO L231 Difference]: Finished difference. Result has 293 places, 304 transitions, 688 flow [2022-11-20 11:26:00,989 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} [2022-11-20 11:26:00,990 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -25 predicate places. [2022-11-20 11:26:00,991 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 304 transitions, 688 flow [2022-11-20 11:26:00,992 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) [2022-11-20 11:26:00,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:26:00,993 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] [2022-11-20 11:26:00,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:26:00,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-20 11:26:00,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash 157454603, now seen corresponding path program 1 times [2022-11-20 11:26:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53499059] [2022-11-20 11:26:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53499059] [2022-11-20 11:26:01,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53499059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:01,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:26:01,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:26:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161287699] [2022-11-20 11:26:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:01,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:26:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:26:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:26:01,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-20 11:26:01,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 304 transitions, 688 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) [2022-11-20 11:26:01,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:26:01,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-20 11:26:01,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:26:04,020 INFO L130 PetriNetUnfolder]: 1756/12328 cut-off events. [2022-11-20 11:26:04,021 INFO L131 PetriNetUnfolder]: For 577/610 co-relation queries the response was YES. [2022-11-20 11:26:04,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15755 conditions, 12328 events. 1756/12328 cut-off events. For 577/610 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 155517 event pairs, 663 based on Foata normal form. 0/10044 useless extension candidates. Maximal degree in co-relation 9425. Up to 1809 conditions per place. [2022-11-20 11:26:04,192 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 30 selfloop transitions, 6 changer transitions 0/316 dead transitions. [2022-11-20 11:26:04,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 316 transitions, 799 flow [2022-11-20 11:26:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:26:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:26:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-20 11:26:04,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-20 11:26:04,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-20 11:26:04,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-20 11:26:04,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:26:04,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-20 11:26:04,201 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) [2022-11-20 11:26:04,204 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) [2022-11-20 11:26:04,205 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) [2022-11-20 11:26:04,205 INFO L175 Difference]: Start difference. First operand has 293 places, 304 transitions, 688 flow. Second operand 3 states and 891 transitions. [2022-11-20 11:26:04,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 316 transitions, 799 flow [2022-11-20 11:26:04,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 316 transitions, 785 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-20 11:26:04,215 INFO L231 Difference]: Finished difference. Result has 295 places, 309 transitions, 732 flow [2022-11-20 11:26:04,216 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=732, PETRI_PLACES=295, PETRI_TRANSITIONS=309} [2022-11-20 11:26:04,217 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -23 predicate places. [2022-11-20 11:26:04,218 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 309 transitions, 732 flow [2022-11-20 11:26:04,219 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) [2022-11-20 11:26:04,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:26:04,219 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] [2022-11-20 11:26:04,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:26:04,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-20 11:26:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1666764841, now seen corresponding path program 1 times [2022-11-20 11:26:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:04,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326333487] [2022-11-20 11:26:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:04,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:04,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326333487] [2022-11-20 11:26:04,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326333487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:04,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:26:04,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:26:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662351820] [2022-11-20 11:26:04,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:04,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:26:04,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:04,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:26:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:26:04,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 341 [2022-11-20 11:26:04,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 309 transitions, 732 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) [2022-11-20 11:26:04,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:26:04,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 341 [2022-11-20 11:26:04,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:26:26,953 INFO L130 PetriNetUnfolder]: 40903/118782 cut-off events. [2022-11-20 11:26:26,954 INFO L131 PetriNetUnfolder]: For 3674/3723 co-relation queries the response was YES. [2022-11-20 11:26:27,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184206 conditions, 118782 events. 40903/118782 cut-off events. For 3674/3723 co-relation queries the response was YES. Maximal size of possible extension queue 3792. Compared 1733903 event pairs, 12354 based on Foata normal form. 0/100492 useless extension candidates. Maximal degree in co-relation 95312. Up to 30380 conditions per place. [2022-11-20 11:26:28,801 INFO L137 encePairwiseOnDemand]: 334/341 looper letters, 146 selfloop transitions, 29 changer transitions 0/431 dead transitions. [2022-11-20 11:26:28,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 431 transitions, 1464 flow [2022-11-20 11:26:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:26:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:26:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1699 transitions. [2022-11-20 11:26:28,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8304007820136853 [2022-11-20 11:26:28,817 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1699 transitions. [2022-11-20 11:26:28,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1699 transitions. [2022-11-20 11:26:28,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:26:28,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1699 transitions. [2022-11-20 11:26:28,824 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) [2022-11-20 11:26:28,831 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) [2022-11-20 11:26:28,833 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) [2022-11-20 11:26:28,833 INFO L175 Difference]: Start difference. First operand has 295 places, 309 transitions, 732 flow. Second operand 6 states and 1699 transitions. [2022-11-20 11:26:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 431 transitions, 1464 flow [2022-11-20 11:26:28,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 431 transitions, 1428 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:26:28,876 INFO L231 Difference]: Finished difference. Result has 303 places, 337 transitions, 1026 flow [2022-11-20 11:26:28,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1026, PETRI_PLACES=303, PETRI_TRANSITIONS=337} [2022-11-20 11:26:28,877 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -15 predicate places. [2022-11-20 11:26:28,878 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1026 flow [2022-11-20 11:26:28,879 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) [2022-11-20 11:26:28,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:26:28,879 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] [2022-11-20 11:26:28,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:26:28,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_updaterErr6ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-20 11:26:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:28,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1452575937, now seen corresponding path program 1 times [2022-11-20 11:26:28,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:28,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461757866] [2022-11-20 11:26:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:28,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461757866] [2022-11-20 11:26:28,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461757866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:28,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:26:28,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:26:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066726946] [2022-11-20 11:26:28,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:28,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:26:28,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:28,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:26:28,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:26:28,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-11-20 11:26:28,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 337 transitions, 1026 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) [2022-11-20 11:26:28,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:26:28,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-11-20 11:26:28,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:26:49,517 INFO L130 PetriNetUnfolder]: 20010/117690 cut-off events. [2022-11-20 11:26:49,517 INFO L131 PetriNetUnfolder]: For 6260/6307 co-relation queries the response was YES. [2022-11-20 11:26:50,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164555 conditions, 117690 events. 20010/117690 cut-off events. For 6260/6307 co-relation queries the response was YES. Maximal size of possible extension queue 3546. Compared 2115770 event pairs, 3669 based on Foata normal form. 0/100612 useless extension candidates. Maximal degree in co-relation 107257. Up to 19669 conditions per place. [2022-11-20 11:26:50,745 INFO L137 encePairwiseOnDemand]: 314/341 looper letters, 74 selfloop transitions, 20 changer transitions 0/361 dead transitions. [2022-11-20 11:26:50,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 361 transitions, 1264 flow [2022-11-20 11:26:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:26:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:26:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2022-11-20 11:26:50,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8533724340175953 [2022-11-20 11:26:50,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2022-11-20 11:26:50,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2022-11-20 11:26:50,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:26:50,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2022-11-20 11:26:50,753 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) [2022-11-20 11:26:50,761 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) [2022-11-20 11:26:50,762 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) [2022-11-20 11:26:50,762 INFO L175 Difference]: Start difference. First operand has 303 places, 337 transitions, 1026 flow. Second operand 3 states and 873 transitions. [2022-11-20 11:26:50,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 361 transitions, 1264 flow [2022-11-20 11:26:50,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 361 transitions, 1264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:26:50,796 INFO L231 Difference]: Finished difference. Result has 307 places, 355 transitions, 1192 flow [2022-11-20 11:26:50,797 INFO L271 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} [2022-11-20 11:26:50,799 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -11 predicate places. [2022-11-20 11:26:50,800 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 355 transitions, 1192 flow [2022-11-20 11:26:50,800 INFO L496 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) [2022-11-20 11:26:50,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:26:50,800 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] [2022-11-20 11:26:50,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:26:50,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-20 11:26:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1452606722, now seen corresponding path program 1 times [2022-11-20 11:26:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:50,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230460067] [2022-11-20 11:26:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:50,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:50,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230460067] [2022-11-20 11:26:50,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230460067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:50,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:26:50,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:26:50,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231436091] [2022-11-20 11:26:50,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:50,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:26:50,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:26:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:26:50,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-11-20 11:26:50,878 INFO L100 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) [2022-11-20 11:26:50,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:26:50,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-11-20 11:26:50,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand