./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 03:34:07,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 03:34:07,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 03:34:08,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 03:34:08,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 03:34:08,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 03:34:08,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 03:34:08,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 03:34:08,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 03:34:08,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 03:34:08,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 03:34:08,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 03:34:08,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 03:34:08,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 03:34:08,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 03:34:08,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 03:34:08,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 03:34:08,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 03:34:08,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 03:34:08,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 03:34:08,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 03:34:08,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 03:34:08,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 03:34:08,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 03:34:08,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 03:34:08,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 03:34:08,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 03:34:08,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 03:34:08,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 03:34:08,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 03:34:08,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 03:34:08,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 03:34:08,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 03:34:08,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 03:34:08,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 03:34:08,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 03:34:08,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 03:34:08,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 03:34:08,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 03:34:08,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 03:34:08,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 03:34:08,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-29 03:34:08,122 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 03:34:08,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 03:34:08,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 03:34:08,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 03:34:08,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 03:34:08,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 03:34:08,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 03:34:08,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 03:34:08,126 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 03:34:08,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 03:34:08,127 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 03:34:08,127 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 03:34:08,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 03:34:08,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 03:34:08,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 03:34:08,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-29 03:34:08,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 03:34:08,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-29 03:34:08,128 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-29 03:34:08,128 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 03:34:08,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-29 03:34:08,129 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 03:34:08,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-29 03:34:08,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 03:34:08,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 03:34:08,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 03:34:08,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 03:34:08,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 03:34:08,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 03:34:08,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-29 03:34:08,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 03:34:08,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 03:34:08,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 03:34:08,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-29 03:34:08,131 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 03:34:08,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 03:34:08,131 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 03:34:08,132 INFO L138 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 03:34:08,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 03:34:08,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 03:34:08,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 03:34:08,423 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 03:34:08,423 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 03:34:08,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-08-29 03:34:09,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 03:34:09,734 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 03:34:09,735 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-08-29 03:34:09,739 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90799f1a0/d56a9faab735494e9f7db353b9f1012b/FLAG51ca36890 [2023-08-29 03:34:09,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90799f1a0/d56a9faab735494e9f7db353b9f1012b [2023-08-29 03:34:09,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 03:34:09,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 03:34:09,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 03:34:09,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 03:34:09,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 03:34:09,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:09,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17433512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09, skipping insertion in model container [2023-08-29 03:34:09,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:09,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 03:34:09,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 03:34:09,874 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c[5938,5951] [2023-08-29 03:34:09,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 03:34:09,881 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 03:34:09,908 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c[5938,5951] [2023-08-29 03:34:09,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 03:34:09,914 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 03:34:09,914 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 03:34:09,918 INFO L208 MainTranslator]: Completed translation [2023-08-29 03:34:09,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09 WrapperNode [2023-08-29 03:34:09,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 03:34:09,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 03:34:09,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 03:34:09,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 03:34:09,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:09,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:09,988 INFO L138 Inliner]: procedures = 25, calls = 120, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 510 [2023-08-29 03:34:09,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 03:34:09,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 03:34:09,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 03:34:09,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 03:34:10,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 03:34:10,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 03:34:10,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 03:34:10,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 03:34:10,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (1/1) ... [2023-08-29 03:34:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 03:34:10,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 03:34:10,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 03:34:10,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 03:34:10,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 03:34:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 03:34:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 03:34:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 03:34:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 03:34:10,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 03:34:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 03:34:10,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 03:34:10,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 03:34:10,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 03:34:10,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 03:34:10,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 03:34:10,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 03:34:10,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-29 03:34:10,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-29 03:34:10,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-29 03:34:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-29 03:34:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 03:34:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 03:34:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 03:34:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 03:34:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 03:34:10,146 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 03:34:10,252 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 03:34:10,254 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 03:34:10,793 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 03:34:10,914 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 03:34:10,915 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 03:34:10,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:34:10 BoogieIcfgContainer [2023-08-29 03:34:10,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 03:34:10,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 03:34:10,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 03:34:10,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 03:34:10,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 03:34:09" (1/3) ... [2023-08-29 03:34:10,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0b5120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 03:34:10, skipping insertion in model container [2023-08-29 03:34:10,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:34:09" (2/3) ... [2023-08-29 03:34:10,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0b5120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 03:34:10, skipping insertion in model container [2023-08-29 03:34:10,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:34:10" (3/3) ... [2023-08-29 03:34:10,923 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2023-08-29 03:34:10,930 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-29 03:34:10,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 03:34:10,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2023-08-29 03:34:10,937 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 03:34:11,043 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-29 03:34:11,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 480 places, 477 transitions, 1026 flow [2023-08-29 03:34:11,232 INFO L130 PetriNetUnfolder]: 16/437 cut-off events. [2023-08-29 03:34:11,232 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 03:34:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 437 events. 16/437 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 864 event pairs, 0 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 362. Up to 3 conditions per place. [2023-08-29 03:34:11,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 480 places, 477 transitions, 1026 flow [2023-08-29 03:34:11,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 419 transitions, 886 flow [2023-08-29 03:34:11,251 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 03:34:11,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 424 places, 419 transitions, 886 flow [2023-08-29 03:34:11,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 424 places, 419 transitions, 886 flow [2023-08-29 03:34:11,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 424 places, 419 transitions, 886 flow [2023-08-29 03:34:11,322 INFO L130 PetriNetUnfolder]: 14/419 cut-off events. [2023-08-29 03:34:11,322 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 03:34:11,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 419 events. 14/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 844 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 362. Up to 3 conditions per place. [2023-08-29 03:34:11,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 33080 [2023-08-29 03:34:15,805 INFO L134 LiptonReduction]: Checked pairs total: 452430 [2023-08-29 03:34:15,806 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-08-29 03:34:15,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 03:34:15,827 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;@50361673, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 03:34:15,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 148 error locations. [2023-08-29 03:34:15,829 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 03:34:15,829 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 03:34:15,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 03:34:15,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 03:34:15,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 144 more)] === [2023-08-29 03:34:15,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 03:34:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2034, now seen corresponding path program 1 times [2023-08-29 03:34:15,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 03:34:15,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567297854] [2023-08-29 03:34:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 03:34:15,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 03:34:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 03:34:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 03:34:15,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 03:34:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567297854] [2023-08-29 03:34:15,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567297854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 03:34:15,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 03:34:15,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 03:34:15,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659777017] [2023-08-29 03:34:15,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 03:34:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 03:34:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 03:34:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 03:34:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 03:34:15,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 874 [2023-08-29 03:34:15,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 198 transitions, 444 flow. Second operand has 2 states, 2 states have (on average 364.5) internal successors, (729), 2 states have internal predecessors, (729), 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) [2023-08-29 03:34:15,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 03:34:15,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 874 [2023-08-29 03:34:15,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 03:34:44,057 INFO L130 PetriNetUnfolder]: 332085/426317 cut-off events. [2023-08-29 03:34:44,057 INFO L131 PetriNetUnfolder]: For 34582/37875 co-relation queries the response was YES. [2023-08-29 03:34:45,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866245 conditions, 426317 events. 332085/426317 cut-off events. For 34582/37875 co-relation queries the response was YES. Maximal size of possible extension queue 9126. Compared 2602855 event pairs, 293865 based on Foata normal form. 391/382455 useless extension candidates. Maximal degree in co-relation 862118. Up to 408136 conditions per place. [2023-08-29 03:34:47,647 INFO L137 encePairwiseOnDemand]: 798/874 looper letters, 65 selfloop transitions, 0 changer transitions 1/122 dead transitions. [2023-08-29 03:34:47,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 122 transitions, 424 flow [2023-08-29 03:34:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 03:34:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 03:34:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 870 transitions. [2023-08-29 03:34:47,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4977116704805492 [2023-08-29 03:34:47,661 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 870 transitions. [2023-08-29 03:34:47,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 870 transitions. [2023-08-29 03:34:47,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 03:34:47,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 870 transitions. [2023-08-29 03:34:47,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 435.0) internal successors, (870), 2 states have internal predecessors, (870), 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) [2023-08-29 03:34:47,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 874.0) internal successors, (2622), 3 states have internal predecessors, (2622), 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) [2023-08-29 03:34:47,674 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 874.0) internal successors, (2622), 3 states have internal predecessors, (2622), 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) [2023-08-29 03:34:47,676 INFO L175 Difference]: Start difference. First operand has 209 places, 198 transitions, 444 flow. Second operand 2 states and 870 transitions. [2023-08-29 03:34:47,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 122 transitions, 424 flow [2023-08-29 03:34:48,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 122 transitions, 392 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 03:34:48,230 INFO L231 Difference]: Finished difference. Result has 122 places, 121 transitions, 257 flow [2023-08-29 03:34:48,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=874, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=257, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2023-08-29 03:34:48,234 INFO L281 CegarLoopForPetriNet]: 209 programPoint places, -87 predicate places. [2023-08-29 03:34:48,235 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 257 flow [2023-08-29 03:34:48,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 364.5) internal successors, (729), 2 states have internal predecessors, (729), 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) [2023-08-29 03:34:48,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 03:34:48,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 03:34:48,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 03:34:48,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 144 more)] === [2023-08-29 03:34:48,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 03:34:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash -155169012, now seen corresponding path program 1 times [2023-08-29 03:34:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 03:34:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821064937] [2023-08-29 03:34:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 03:34:48,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 03:34:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 03:34:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 03:34:48,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 03:34:48,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821064937] [2023-08-29 03:34:48,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821064937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 03:34:48,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 03:34:48,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 03:34:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095780394] [2023-08-29 03:34:48,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 03:34:48,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 03:34:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 03:34:48,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 03:34:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 03:34:48,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 874 [2023-08-29 03:34:48,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 356.6666666666667) internal successors, (2140), 6 states have internal predecessors, (2140), 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) [2023-08-29 03:34:48,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 03:34:48,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 874 [2023-08-29 03:34:48,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand