./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 9bd2c7ff 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_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 57356a47c1e9533c32a5036af0336a5d2dbdf5bea55ed5f64606bf9ec7afd35e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:11,753 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:11,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-19 07:37:11,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:11,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:11,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:11,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:11,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:11,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:11,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:11,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:11,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:11,880 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:11,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:11,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:11,882 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:11,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:11,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:11,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:11,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:11,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:11,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:11,886 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 07:37:11,887 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:37:11,888 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:11,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:11,889 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:11,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:11,890 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:11,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:11,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:11,892 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:11,892 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:11,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:11,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:11,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:11,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:11,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:11,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:11,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:11,896 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:11,897 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57356a47c1e9533c32a5036af0336a5d2dbdf5bea55ed5f64606bf9ec7afd35e [2023-11-19 07:37:12,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:12,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:12,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:12,267 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:12,268 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:12,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-2.i [2023-11-19 07:37:15,422 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:15,693 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:15,694 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-2.i [2023-11-19 07:37:15,719 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/data/a9657f1a4/3f752c90e73c4f6fbc432851a924ed40/FLAG8646bfd76 [2023-11-19 07:37:15,739 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/data/a9657f1a4/3f752c90e73c4f6fbc432851a924ed40 [2023-11-19 07:37:15,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:15,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:15,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:15,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:15,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:15,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:15" (1/1) ... [2023-11-19 07:37:15,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36df90aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:15, skipping insertion in model container [2023-11-19 07:37:15,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:15" (1/1) ... [2023-11-19 07:37:15,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:16,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:16,258 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:16,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:16,343 WARN L675 CHandler]: The function pthread_detach is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:16,351 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:16,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16 WrapperNode [2023-11-19 07:37:16,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:16,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:16,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:16,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:16,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,407 INFO L138 Inliner]: procedures = 159, calls = 48, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2023-11-19 07:37:16,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:16,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:16,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:16,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:16,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:16,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:16,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:16,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:16,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (1/1) ... [2023-11-19 07:37:16,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:16,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:16,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2af791f-26f6-40cf-bbc0-c4f3f58f4e7a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:37:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:37:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:37:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:37:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:37:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure pthread_detach [2023-11-19 07:37:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-11-19 07:37:16,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-11-19 07:37:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:16,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:16,554 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:37:16,717 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:16,723 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:17,081 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:17,094 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:17,094 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:37:17,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:17 BoogieIcfgContainer [2023-11-19 07:37:17,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:17,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:17,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:17,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:17,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:15" (1/3) ... [2023-11-19 07:37:17,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5620b71d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:17, skipping insertion in model container [2023-11-19 07:37:17,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:16" (2/3) ... [2023-11-19 07:37:17,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5620b71d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:17, skipping insertion in model container [2023-11-19 07:37:17,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:17" (3/3) ... [2023-11-19 07:37:17,111 INFO L112 eAbstractionObserver]: Analyzing ICFG thread-join-counter-inner-race-2.i [2023-11-19 07:37:17,121 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:37:17,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:17,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-19 07:37:17,134 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:37:17,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:37:17,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 176 transitions, 356 flow [2023-11-19 07:37:17,414 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-19 07:37:17,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:17,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 224 events. 13/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 405 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 121. Up to 4 conditions per place. [2023-11-19 07:37:17,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 176 transitions, 356 flow [2023-11-19 07:37:17,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 176 transitions, 356 flow [2023-11-19 07:37:17,448 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:37:17,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 176 transitions, 356 flow [2023-11-19 07:37:17,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 176 transitions, 356 flow [2023-11-19 07:37:17,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 176 transitions, 356 flow [2023-11-19 07:37:17,557 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-19 07:37:17,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:17,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 224 events. 13/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 405 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 121. Up to 4 conditions per place. [2023-11-19 07:37:17,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 7370 [2023-11-19 07:37:22,450 INFO L134 LiptonReduction]: Checked pairs total: 35560 [2023-11-19 07:37:22,450 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-19 07:37:22,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:22,475 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@af3ff91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:22,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-19 07:37:22,480 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:37:22,480 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:37:22,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:22,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:22,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:37:22,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-11-19 07:37:22,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash 18253438, now seen corresponding path program 1 times [2023-11-19 07:37:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:22,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439529918] [2023-11-19 07:37:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439529918] [2023-11-19 07:37:22,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439529918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:22,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808199894] [2023-11-19 07:37:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:22,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:22,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:22,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 292 [2023-11-19 07:37:22,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:22,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:22,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 292 [2023-11-19 07:37:22,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:23,334 INFO L124 PetriNetUnfolderBase]: 441/1282 cut-off events. [2023-11-19 07:37:23,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:23,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 1282 events. 441/1282 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 8105 event pairs, 107 based on Foata normal form. 25/1164 useless extension candidates. Maximal degree in co-relation 2100. Up to 515 conditions per place. [2023-11-19 07:37:23,354 INFO L140 encePairwiseOnDemand]: 276/292 looper letters, 58 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2023-11-19 07:37:23,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 320 flow [2023-11-19 07:37:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-11-19 07:37:23,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6232876712328768 [2023-11-19 07:37:23,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-11-19 07:37:23,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-11-19 07:37:23,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:23,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-11-19 07:37:23,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,409 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 144 flow. Second operand 3 states and 546 transitions. [2023-11-19 07:37:23,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 320 flow [2023-11-19 07:37:23,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:37:23,418 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 192 flow [2023-11-19 07:37:23,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-19 07:37:23,426 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-11-19 07:37:23,426 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 192 flow [2023-11-19 07:37:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:23,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:23,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:37:23,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:23,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-11-19 07:37:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 367081599, now seen corresponding path program 1 times [2023-11-19 07:37:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:23,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283738351] [2023-11-19 07:37:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:23,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:37:23,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:37:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:37:23,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:37:23,613 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:37:23,616 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2023-11-19 07:37:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (16 of 18 remaining) [2023-11-19 07:37:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (15 of 18 remaining) [2023-11-19 07:37:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (14 of 18 remaining) [2023-11-19 07:37:23,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (13 of 18 remaining) [2023-11-19 07:37:23,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (12 of 18 remaining) [2023-11-19 07:37:23,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (11 of 18 remaining) [2023-11-19 07:37:23,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (10 of 18 remaining) [2023-11-19 07:37:23,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (9 of 18 remaining) [2023-11-19 07:37:23,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (8 of 18 remaining) [2023-11-19 07:37:23,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (7 of 18 remaining) [2023-11-19 07:37:23,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (6 of 18 remaining) [2023-11-19 07:37:23,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (5 of 18 remaining) [2023-11-19 07:37:23,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (4 of 18 remaining) [2023-11-19 07:37:23,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (3 of 18 remaining) [2023-11-19 07:37:23,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (2 of 18 remaining) [2023-11-19 07:37:23,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (1 of 18 remaining) [2023-11-19 07:37:23,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (0 of 18 remaining) [2023-11-19 07:37:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:23,632 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:37:23,636 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:37:23,636 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:37:23,688 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:37:23,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 232 transitions, 474 flow [2023-11-19 07:37:23,768 INFO L124 PetriNetUnfolderBase]: 20/346 cut-off events. [2023-11-19 07:37:23,768 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:37:23,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 346 events. 20/346 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 827 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 225. Up to 6 conditions per place. [2023-11-19 07:37:23,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 232 transitions, 474 flow [2023-11-19 07:37:23,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 232 transitions, 474 flow [2023-11-19 07:37:23,776 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:37:23,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 232 transitions, 474 flow [2023-11-19 07:37:23,777 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 232 transitions, 474 flow [2023-11-19 07:37:23,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 232 transitions, 474 flow [2023-11-19 07:37:23,846 INFO L124 PetriNetUnfolderBase]: 20/346 cut-off events. [2023-11-19 07:37:23,846 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:37:23,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 346 events. 20/346 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 827 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 225. Up to 6 conditions per place. [2023-11-19 07:37:23,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 20900 [2023-11-19 07:37:29,205 INFO L134 LiptonReduction]: Checked pairs total: 118680 [2023-11-19 07:37:29,205 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-11-19 07:37:29,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:29,209 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@af3ff91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:29,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-19 07:37:29,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:37:29,212 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:37:29,212 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:29,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:29,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:37:29,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:37:29,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash 31332252, now seen corresponding path program 1 times [2023-11-19 07:37:29,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:29,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162359394] [2023-11-19 07:37:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:29,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:29,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:29,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162359394] [2023-11-19 07:37:29,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162359394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:29,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:29,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494445948] [2023-11-19 07:37:29,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:29,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:29,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:29,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:29,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 369 [2023-11-19 07:37:29,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:29,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:29,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 369 [2023-11-19 07:37:29,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:35,240 INFO L124 PetriNetUnfolderBase]: 21385/42658 cut-off events. [2023-11-19 07:37:35,241 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-19 07:37:35,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75070 conditions, 42658 events. 21385/42658 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 412705 event pairs, 6899 based on Foata normal form. 1120/39352 useless extension candidates. Maximal degree in co-relation 54572. Up to 17001 conditions per place. [2023-11-19 07:37:35,599 INFO L140 encePairwiseOnDemand]: 342/369 looper letters, 98 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2023-11-19 07:37:35,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 158 transitions, 559 flow [2023-11-19 07:37:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-11-19 07:37:35,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648599819331527 [2023-11-19 07:37:35,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-11-19 07:37:35,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-11-19 07:37:35,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:35,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-11-19 07:37:35,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:35,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:35,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:35,616 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 230 flow. Second operand 3 states and 736 transitions. [2023-11-19 07:37:35,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 158 transitions, 559 flow [2023-11-19 07:37:35,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 559 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:37:35,627 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 360 flow [2023-11-19 07:37:35,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2023-11-19 07:37:35,629 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2023-11-19 07:37:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 360 flow [2023-11-19 07:37:35,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:35,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:35,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:37:35,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:37:35,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1635798047, now seen corresponding path program 1 times [2023-11-19 07:37:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:35,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701093003] [2023-11-19 07:37:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:35,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:35,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701093003] [2023-11-19 07:37:35,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701093003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:35,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:35,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030715707] [2023-11-19 07:37:35,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:35,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:35,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 369 [2023-11-19 07:37:35,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:35,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:35,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 369 [2023-11-19 07:37:35,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:40,108 INFO L124 PetriNetUnfolderBase]: 17732/36154 cut-off events. [2023-11-19 07:37:40,108 INFO L125 PetriNetUnfolderBase]: For 8036/8894 co-relation queries the response was YES. [2023-11-19 07:37:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70854 conditions, 36154 events. 17732/36154 cut-off events. For 8036/8894 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 355839 event pairs, 11690 based on Foata normal form. 202/32045 useless extension candidates. Maximal degree in co-relation 53539. Up to 24464 conditions per place. [2023-11-19 07:37:40,407 INFO L140 encePairwiseOnDemand]: 364/369 looper letters, 88 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2023-11-19 07:37:40,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 160 transitions, 652 flow [2023-11-19 07:37:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-11-19 07:37:40,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576332429990966 [2023-11-19 07:37:40,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-11-19 07:37:40,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-11-19 07:37:40,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:40,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-11-19 07:37:40,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,422 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 360 flow. Second operand 3 states and 728 transitions. [2023-11-19 07:37:40,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 160 transitions, 652 flow [2023-11-19 07:37:40,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:40,467 INFO L231 Difference]: Finished difference. Result has 111 places, 124 transitions, 354 flow [2023-11-19 07:37:40,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=111, PETRI_TRANSITIONS=124} [2023-11-19 07:37:40,471 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, 4 predicate places. [2023-11-19 07:37:40,471 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 124 transitions, 354 flow [2023-11-19 07:37:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:40,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:40,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:37:40,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:37:40,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1425914311, now seen corresponding path program 1 times [2023-11-19 07:37:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911347844] [2023-11-19 07:37:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:40,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911347844] [2023-11-19 07:37:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911347844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:40,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:40,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173871559] [2023-11-19 07:37:40,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:40,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:40,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:40,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:40,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 369 [2023-11-19 07:37:40,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 124 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:40,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 369 [2023-11-19 07:37:40,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:44,663 INFO L124 PetriNetUnfolderBase]: 20238/40985 cut-off events. [2023-11-19 07:37:44,664 INFO L125 PetriNetUnfolderBase]: For 6931/8596 co-relation queries the response was YES. [2023-11-19 07:37:44,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82450 conditions, 40985 events. 20238/40985 cut-off events. For 6931/8596 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 402926 event pairs, 11742 based on Foata normal form. 745/36835 useless extension candidates. Maximal degree in co-relation 49195. Up to 26953 conditions per place. [2023-11-19 07:37:44,905 INFO L140 encePairwiseOnDemand]: 359/369 looper letters, 84 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2023-11-19 07:37:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 163 transitions, 666 flow [2023-11-19 07:37:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-11-19 07:37:44,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440831074977417 [2023-11-19 07:37:44,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-11-19 07:37:44,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-11-19 07:37:44,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:44,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-11-19 07:37:44,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,917 INFO L175 Difference]: Start difference. First operand has 111 places, 124 transitions, 354 flow. Second operand 3 states and 713 transitions. [2023-11-19 07:37:44,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 163 transitions, 666 flow [2023-11-19 07:37:44,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 163 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:44,943 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 496 flow [2023-11-19 07:37:44,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=496, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2023-11-19 07:37:44,946 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2023-11-19 07:37:44,946 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 496 flow [2023-11-19 07:37:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:44,947 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:37:44,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:37:44,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:37:44,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash -757207102, now seen corresponding path program 1 times [2023-11-19 07:37:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:44,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446406441] [2023-11-19 07:37:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:37:44,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:37:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:37:45,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:37:45,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:37:45,043 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2023-11-19 07:37:45,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (22 of 24 remaining) [2023-11-19 07:37:45,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (21 of 24 remaining) [2023-11-19 07:37:45,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (20 of 24 remaining) [2023-11-19 07:37:45,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (19 of 24 remaining) [2023-11-19 07:37:45,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (18 of 24 remaining) [2023-11-19 07:37:45,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (17 of 24 remaining) [2023-11-19 07:37:45,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (16 of 24 remaining) [2023-11-19 07:37:45,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (15 of 24 remaining) [2023-11-19 07:37:45,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (14 of 24 remaining) [2023-11-19 07:37:45,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (13 of 24 remaining) [2023-11-19 07:37:45,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (12 of 24 remaining) [2023-11-19 07:37:45,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (11 of 24 remaining) [2023-11-19 07:37:45,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (10 of 24 remaining) [2023-11-19 07:37:45,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (9 of 24 remaining) [2023-11-19 07:37:45,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (8 of 24 remaining) [2023-11-19 07:37:45,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (7 of 24 remaining) [2023-11-19 07:37:45,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (6 of 24 remaining) [2023-11-19 07:37:45,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (5 of 24 remaining) [2023-11-19 07:37:45,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (4 of 24 remaining) [2023-11-19 07:37:45,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (3 of 24 remaining) [2023-11-19 07:37:45,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (2 of 24 remaining) [2023-11-19 07:37:45,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (1 of 24 remaining) [2023-11-19 07:37:45,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (0 of 24 remaining) [2023-11-19 07:37:45,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:37:45,054 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:37:45,054 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:37:45,055 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:37:45,101 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:37:45,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 288 transitions, 594 flow [2023-11-19 07:37:45,226 INFO L124 PetriNetUnfolderBase]: 27/468 cut-off events. [2023-11-19 07:37:45,226 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:37:45,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 468 events. 27/468 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1258 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 350. Up to 8 conditions per place. [2023-11-19 07:37:45,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 288 transitions, 594 flow [2023-11-19 07:37:45,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 288 transitions, 594 flow [2023-11-19 07:37:45,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:37:45,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 288 transitions, 594 flow [2023-11-19 07:37:45,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 288 transitions, 594 flow [2023-11-19 07:37:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 288 transitions, 594 flow [2023-11-19 07:37:45,333 INFO L124 PetriNetUnfolderBase]: 27/468 cut-off events. [2023-11-19 07:37:45,333 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:37:45,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 468 events. 27/468 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1258 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 350. Up to 8 conditions per place. [2023-11-19 07:37:45,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 40590 [2023-11-19 07:37:50,894 INFO L134 LiptonReduction]: Checked pairs total: 240037 [2023-11-19 07:37:50,894 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-11-19 07:37:50,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:50,897 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@af3ff91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:50,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-19 07:37:50,900 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:37:50,901 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:37:50,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:50,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:50,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:37:50,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 27 more)] === [2023-11-19 07:37:50,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 46813147, now seen corresponding path program 1 times [2023-11-19 07:37:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:50,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314030817] [2023-11-19 07:37:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314030817] [2023-11-19 07:37:50,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314030817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:50,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725912451] [2023-11-19 07:37:50,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:50,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:50,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:50,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 447 [2023-11-19 07:37:50,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 147 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:50,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:50,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 447 [2023-11-19 07:37:50,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand