./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 5e519f3a 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_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc --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-5e519f3 [2022-11-02 20:32:35,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:32:35,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:32:35,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:32:35,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:32:35,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:32:35,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:32:35,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:32:35,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:32:35,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:32:35,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:32:35,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:32:35,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:32:35,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:32:35,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:32:35,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:32:35,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:32:35,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:32:35,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:32:35,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:32:35,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:32:35,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:32:35,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:32:35,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:32:35,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:32:35,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:32:35,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:32:35,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:32:35,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:32:35,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:32:35,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:32:35,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:32:35,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:32:35,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:32:35,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:32:35,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:32:35,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:32:35,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:32:35,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:32:35,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:32:35,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:32:35,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/config/svcomp-DataRace-32bit-Automizer_Default.epf [2022-11-02 20:32:35,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:32:35,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:32:35,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:32:35,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:32:35,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:32:35,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:32:35,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:32:35,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:32:35,863 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:32:35,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:32:35,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:32:35,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:32:35,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:32:35,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:32:35,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:32:35,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:32:35,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:32:35,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:32:35,867 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-02 20:32:35,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:32:35,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:32:35,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:32:35,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:32:35,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:32:35,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:32:35,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:32:35,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:35,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:32:35,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:32:35,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:32:35,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:32:35,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:32:35,872 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:32:35,872 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:32:35,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:32:35,873 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_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-11-02 20:32:36,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:32:36,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:32:36,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:32:36,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:32:36,320 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:32:36,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-02 20:32:36,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/data/7926e4579/f219e2eced46493184bfc3ac2eb9222d/FLAG448966bf4 [2022-11-02 20:32:37,132 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:32:37,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-02 20:32:37,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/data/7926e4579/f219e2eced46493184bfc3ac2eb9222d/FLAG448966bf4 [2022-11-02 20:32:37,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/data/7926e4579/f219e2eced46493184bfc3ac2eb9222d [2022-11-02 20:32:37,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:32:37,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:32:37,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:37,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:32:37,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:32:37,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:37" (1/1) ... [2022-11-02 20:32:37,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fafc357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:37, skipping insertion in model container [2022-11-02 20:32:37,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:37" (1/1) ... [2022-11-02 20:32:37,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:32:37,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:32:37,903 WARN L230 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_136d0317-16c0-47d8-996f-e490e5f8fc21/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-02 20:32:37,906 WARN L230 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_136d0317-16c0-47d8-996f-e490e5f8fc21/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-02 20:32:37,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:37,962 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:32:38,028 WARN L230 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_136d0317-16c0-47d8-996f-e490e5f8fc21/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-02 20:32:38,030 WARN L230 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_136d0317-16c0-47d8-996f-e490e5f8fc21/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-02 20:32:38,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:38,108 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:32:38,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38 WrapperNode [2022-11-02 20:32:38,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:38,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:38,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:32:38,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:32:38,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,221 INFO L138 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 473 [2022-11-02 20:32:38,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:38,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:32:38,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:32:38,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:32:38,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,275 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:32:38,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:32:38,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:32:38,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:32:38,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (1/1) ... [2022-11-02 20:32:38,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:38,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:32:38,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_136d0317-16c0-47d8-996f-e490e5f8fc21/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:32:38,384 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-11-02 20:32:38,387 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-11-02 20:32:38,387 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-11-02 20:32:38,387 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-11-02 20:32:38,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:32:38,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:32:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-11-02 20:32:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-11-02 20:32:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:32:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:32:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:32:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:32:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:32:38,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:32:38,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:32:38,394 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:32:38,681 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:32:38,684 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:32:39,652 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:32:40,068 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:32:40,069 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:32:40,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:40 BoogieIcfgContainer [2022-11-02 20:32:40,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:32:40,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:32:40,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:32:40,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:32:40,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:32:37" (1/3) ... [2022-11-02 20:32:40,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9a522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:32:40, skipping insertion in model container [2022-11-02 20:32:40,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:38" (2/3) ... [2022-11-02 20:32:40,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e9a522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:32:40, skipping insertion in model container [2022-11-02 20:32:40,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:40" (3/3) ... [2022-11-02 20:32:40,092 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-11-02 20:32:40,102 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:32:40,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:32:40,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-02 20:32:40,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:32:40,304 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:32:40,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 341 transitions, 706 flow [2022-11-02 20:32:40,573 INFO L130 PetriNetUnfolder]: 18/338 cut-off events. [2022-11-02 20:32:40,573 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:32:40,587 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 1061 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. [2022-11-02 20:32:40,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 341 transitions, 706 flow [2022-11-02 20:32:40,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 326 transitions, 667 flow [2022-11-02 20:32:40,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:32:40,623 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;@33d569bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:32:40,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-11-02 20:32:40,645 INFO L130 PetriNetUnfolder]: 1/45 cut-off events. [2022-11-02 20:32:40,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:32:40,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:32:40,646 INFO L208 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] [2022-11-02 20:32:40,647 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)] === [2022-11-02 20:32:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:40,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1084406491, now seen corresponding path program 1 times [2022-11-02 20:32:40,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:40,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768852179] [2022-11-02 20:32:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:41,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768852179] [2022-11-02 20:32:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768852179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:41,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:41,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:32:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226636257] [2022-11-02 20:32:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:32:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:32:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:32:41,135 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 341 [2022-11-02 20:32:41,140 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) [2022-11-02 20:32:41,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:41,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 341 [2022-11-02 20:32:41,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:32:43,587 INFO L130 PetriNetUnfolder]: 1878/8465 cut-off events. [2022-11-02 20:32:43,587 INFO L131 PetriNetUnfolder]: For 439/439 co-relation queries the response was YES. [2022-11-02 20:32:43,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11195 conditions, 8465 events. 1878/8465 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 88307 event pairs, 550 based on Foata normal form. 565/7569 useless extension candidates. Maximal degree in co-relation 10826. Up to 1933 conditions per place. [2022-11-02 20:32:43,731 INFO L137 encePairwiseOnDemand]: 297/341 looper letters, 45 selfloop transitions, 8 changer transitions 0/315 dead transitions. [2022-11-02 20:32:43,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 315 transitions, 763 flow [2022-11-02 20:32:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:32:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:32:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 947 transitions. [2022-11-02 20:32:43,753 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9257086999022482 [2022-11-02 20:32:43,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 947 transitions. [2022-11-02 20:32:43,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 947 transitions. [2022-11-02 20:32:43,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:32:43,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 947 transitions. [2022-11-02 20:32:43,770 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) [2022-11-02 20:32:43,779 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) [2022-11-02 20:32:43,781 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) [2022-11-02 20:32:43,783 INFO L175 Difference]: Start difference. First operand has 318 places, 326 transitions, 667 flow. Second operand 3 states and 947 transitions. [2022-11-02 20:32:43,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 315 transitions, 763 flow [2022-11-02 20:32:43,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 315 transitions, 747 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-02 20:32:43,804 INFO L231 Difference]: Finished difference. Result has 289 places, 298 transitions, 650 flow [2022-11-02 20:32:43,807 INFO L270 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} [2022-11-02 20:32:43,812 INFO L287 CegarLoopForPetriNet]: 318 programPoint places, -29 predicate places. [2022-11-02 20:32:43,812 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 298 transitions, 650 flow [2022-11-02 20:32:43,813 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) [2022-11-02 20:32:43,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:32:43,814 INFO L208 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] [2022-11-02 20:32:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:32:43,815 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)] === [2022-11-02 20:32:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash 92635290, now seen corresponding path program 1 times [2022-11-02 20:32:43,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:43,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690656459] [2022-11-02 20:32:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:43,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:43,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690656459] [2022-11-02 20:32:43,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690656459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:43,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:43,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:32:43,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745275610] [2022-11-02 20:32:43,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:43,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:32:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:32:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:32:43,963 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-02 20:32:43,964 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) [2022-11-02 20:32:43,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:43,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-02 20:32:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:32:45,534 INFO L130 PetriNetUnfolder]: 1129/6182 cut-off events. [2022-11-02 20:32:45,535 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2022-11-02 20:32:45,599 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 187. Compared 64857 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. [2022-11-02 20:32:45,651 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 28 selfloop transitions, 4 changer transitions 0/308 dead transitions. [2022-11-02 20:32:45,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 308 transitions, 737 flow [2022-11-02 20:32:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:32:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:32:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-02 20:32:45,656 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-02 20:32:45,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-02 20:32:45,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-02 20:32:45,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:32:45,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-02 20:32:45,661 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) [2022-11-02 20:32:45,665 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) [2022-11-02 20:32:45,666 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) [2022-11-02 20:32:45,667 INFO L175 Difference]: Start difference. First operand has 289 places, 298 transitions, 650 flow. Second operand 3 states and 891 transitions. [2022-11-02 20:32:45,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 308 transitions, 737 flow [2022-11-02 20:32:45,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 308 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:32:45,682 INFO L231 Difference]: Finished difference. Result has 291 places, 301 transitions, 664 flow [2022-11-02 20:32:45,683 INFO L270 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} [2022-11-02 20:32:45,686 INFO L287 CegarLoopForPetriNet]: 318 programPoint places, -27 predicate places. [2022-11-02 20:32:45,686 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 301 transitions, 664 flow [2022-11-02 20:32:45,688 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) [2022-11-02 20:32:45,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:32:45,689 INFO L208 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] [2022-11-02 20:32:45,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:32:45,690 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)] === [2022-11-02 20:32:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1769711449, now seen corresponding path program 1 times [2022-11-02 20:32:45,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:45,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805429581] [2022-11-02 20:32:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:45,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805429581] [2022-11-02 20:32:45,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805429581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:45,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:45,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:32:45,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480664237] [2022-11-02 20:32:45,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:32:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:32:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:32:45,832 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-02 20:32:45,834 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) [2022-11-02 20:32:45,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:45,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-02 20:32:45,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:32:47,666 INFO L130 PetriNetUnfolder]: 1303/7779 cut-off events. [2022-11-02 20:32:47,668 INFO L131 PetriNetUnfolder]: For 308/328 co-relation queries the response was YES. [2022-11-02 20:32:47,758 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 86029 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. [2022-11-02 20:32:47,817 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 30 selfloop transitions, 4 changer transitions 0/311 dead transitions. [2022-11-02 20:32:47,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 311 transitions, 757 flow [2022-11-02 20:32:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:32:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:32:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-02 20:32:47,825 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-02 20:32:47,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-02 20:32:47,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-02 20:32:47,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:32:47,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-02 20:32:47,831 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) [2022-11-02 20:32:47,834 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) [2022-11-02 20:32:47,836 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) [2022-11-02 20:32:47,836 INFO L175 Difference]: Start difference. First operand has 291 places, 301 transitions, 664 flow. Second operand 3 states and 891 transitions. [2022-11-02 20:32:47,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 311 transitions, 757 flow [2022-11-02 20:32:47,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 311 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:32:47,849 INFO L231 Difference]: Finished difference. Result has 293 places, 304 transitions, 688 flow [2022-11-02 20:32:47,850 INFO L270 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} [2022-11-02 20:32:47,854 INFO L287 CegarLoopForPetriNet]: 318 programPoint places, -25 predicate places. [2022-11-02 20:32:47,854 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 304 transitions, 688 flow [2022-11-02 20:32:47,855 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) [2022-11-02 20:32:47,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:32:47,856 INFO L208 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] [2022-11-02 20:32:47,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:32:47,857 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)] === [2022-11-02 20:32:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash 157454603, now seen corresponding path program 1 times [2022-11-02 20:32:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836303927] [2022-11-02 20:32:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:47,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836303927] [2022-11-02 20:32:47,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836303927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:47,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:47,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:32:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994831960] [2022-11-02 20:32:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:47,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:32:47,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:32:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:32:47,999 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 341 [2022-11-02 20:32:48,001 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) [2022-11-02 20:32:48,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:48,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 341 [2022-11-02 20:32:48,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:32:50,790 INFO L130 PetriNetUnfolder]: 1756/12328 cut-off events. [2022-11-02 20:32:50,790 INFO L131 PetriNetUnfolder]: For 577/610 co-relation queries the response was YES. [2022-11-02 20:32:50,908 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 155541 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. [2022-11-02 20:32:50,971 INFO L137 encePairwiseOnDemand]: 336/341 looper letters, 30 selfloop transitions, 6 changer transitions 0/316 dead transitions. [2022-11-02 20:32:50,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 316 transitions, 799 flow [2022-11-02 20:32:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:32:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:32:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-02 20:32:50,975 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-02 20:32:50,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-02 20:32:50,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-02 20:32:50,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:32:50,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-02 20:32:50,983 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) [2022-11-02 20:32:50,986 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) [2022-11-02 20:32:50,987 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) [2022-11-02 20:32:50,988 INFO L175 Difference]: Start difference. First operand has 293 places, 304 transitions, 688 flow. Second operand 3 states and 891 transitions. [2022-11-02 20:32:50,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 316 transitions, 799 flow [2022-11-02 20:32:51,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 316 transitions, 785 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-02 20:32:51,006 INFO L231 Difference]: Finished difference. Result has 295 places, 309 transitions, 732 flow [2022-11-02 20:32:51,007 INFO L270 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} [2022-11-02 20:32:51,008 INFO L287 CegarLoopForPetriNet]: 318 programPoint places, -23 predicate places. [2022-11-02 20:32:51,010 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 309 transitions, 732 flow [2022-11-02 20:32:51,011 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) [2022-11-02 20:32:51,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:32:51,011 INFO L208 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] [2022-11-02 20:32:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:32:51,012 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)] === [2022-11-02 20:32:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1666764841, now seen corresponding path program 1 times [2022-11-02 20:32:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063639097] [2022-11-02 20:32:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:51,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063639097] [2022-11-02 20:32:51,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063639097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:51,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:51,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:32:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548776205] [2022-11-02 20:32:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:32:51,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:32:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:32:51,589 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 341 [2022-11-02 20:32:51,591 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) [2022-11-02 20:32:51,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:32:51,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 341 [2022-11-02 20:32:51,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:33:19,145 INFO L130 PetriNetUnfolder]: 40903/118782 cut-off events. [2022-11-02 20:33:19,145 INFO L131 PetriNetUnfolder]: For 3674/3723 co-relation queries the response was YES. [2022-11-02 20:33:19,876 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 1733992 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. [2022-11-02 20:33:20,548 INFO L137 encePairwiseOnDemand]: 334/341 looper letters, 146 selfloop transitions, 29 changer transitions 0/431 dead transitions. [2022-11-02 20:33:20,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 431 transitions, 1464 flow [2022-11-02 20:33:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:33:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:33:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1699 transitions. [2022-11-02 20:33:20,557 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8304007820136853 [2022-11-02 20:33:20,557 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1699 transitions. [2022-11-02 20:33:20,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1699 transitions. [2022-11-02 20:33:20,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:33:20,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1699 transitions. [2022-11-02 20:33:20,564 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) [2022-11-02 20:33:20,569 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) [2022-11-02 20:33:20,570 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) [2022-11-02 20:33:20,571 INFO L175 Difference]: Start difference. First operand has 295 places, 309 transitions, 732 flow. Second operand 6 states and 1699 transitions. [2022-11-02 20:33:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 431 transitions, 1464 flow [2022-11-02 20:33:20,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 431 transitions, 1428 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:33:20,607 INFO L231 Difference]: Finished difference. Result has 303 places, 337 transitions, 1026 flow [2022-11-02 20:33:20,607 INFO L270 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} [2022-11-02 20:33:20,610 INFO L287 CegarLoopForPetriNet]: 318 programPoint places, -15 predicate places. [2022-11-02 20:33:20,611 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1026 flow [2022-11-02 20:33:20,612 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) [2022-11-02 20:33:20,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:33:20,613 INFO L208 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] [2022-11-02 20:33:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:33:20,614 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)] === [2022-11-02 20:33:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1452575937, now seen corresponding path program 1 times [2022-11-02 20:33:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362456143] [2022-11-02 20:33:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:20,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362456143] [2022-11-02 20:33:20,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362456143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:20,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:20,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:33:20,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149380769] [2022-11-02 20:33:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:20,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:33:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:33:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:33:20,700 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-11-02 20:33:20,701 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) [2022-11-02 20:33:20,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:33:20,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-11-02 20:33:20,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:33:42,625 INFO L130 PetriNetUnfolder]: 20012/117604 cut-off events. [2022-11-02 20:33:42,625 INFO L131 PetriNetUnfolder]: For 6275/6322 co-relation queries the response was YES. [2022-11-02 20:33:43,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164551 conditions, 117604 events. 20012/117604 cut-off events. For 6275/6322 co-relation queries the response was YES. Maximal size of possible extension queue 3545. Compared 2114110 event pairs, 3873 based on Foata normal form. 0/100560 useless extension candidates. Maximal degree in co-relation 107233. Up to 19670 conditions per place. [2022-11-02 20:33:44,076 INFO L137 encePairwiseOnDemand]: 314/341 looper letters, 74 selfloop transitions, 20 changer transitions 0/361 dead transitions. [2022-11-02 20:33:44,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 361 transitions, 1264 flow [2022-11-02 20:33:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:33:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:33:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2022-11-02 20:33:44,084 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8533724340175953 [2022-11-02 20:33:44,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2022-11-02 20:33:44,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2022-11-02 20:33:44,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:33:44,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2022-11-02 20:33:44,089 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) [2022-11-02 20:33:44,094 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) [2022-11-02 20:33:44,095 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) [2022-11-02 20:33:44,095 INFO L175 Difference]: Start difference. First operand has 303 places, 337 transitions, 1026 flow. Second operand 3 states and 873 transitions. [2022-11-02 20:33:44,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 361 transitions, 1264 flow [2022-11-02 20:33:44,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 361 transitions, 1264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:33:44,127 INFO L231 Difference]: Finished difference. Result has 307 places, 355 transitions, 1192 flow [2022-11-02 20:33:44,127 INFO L270 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} [2022-11-02 20:33:44,131 INFO L287 CegarLoopForPetriNet]: 318 programPoint places, -11 predicate places. [2022-11-02 20:33:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 355 transitions, 1192 flow [2022-11-02 20:33:44,132 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) [2022-11-02 20:33:44,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:33:44,133 INFO L208 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] [2022-11-02 20:33:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:33:44,133 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)] === [2022-11-02 20:33:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1452606722, now seen corresponding path program 1 times [2022-11-02 20:33:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:44,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834036362] [2022-11-02 20:33:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:44,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834036362] [2022-11-02 20:33:44,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834036362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:44,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:44,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:33:44,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775797593] [2022-11-02 20:33:44,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:33:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:33:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:33:44,232 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 341 [2022-11-02 20:33:44,234 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) [2022-11-02 20:33:44,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:33:44,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 341 [2022-11-02 20:33:44,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand