./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/goblint-regression/28-race_reach_04-munge_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50de8acec85b0b2508f1f33521d9ab6717fa1b5141d6b9e2d08fcb4af894112b --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 [2023-08-30 17:42:56,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:42:56,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:42:56,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:42:56,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:42:56,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:42:56,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:42:56,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:42:56,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:42:56,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:42:56,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:42:56,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:42:56,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:42:56,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:42:56,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:42:56,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:42:56,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:42:56,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:42:56,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:42:56,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:42:56,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:42:56,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:42:56,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:42:56,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:42:56,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:42:56,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:42:56,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:42:56,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:42:56,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:42:56,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:42:56,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:42:56,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:42:56,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:42:56,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:42:56,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:42:56,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:42:56,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:42:56,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:42:56,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:42:56,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:42:56,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:42:56,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:42:56,142 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:42:56,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:42:56,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:42:56,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:42:56,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:42:56,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:42:56,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:42:56,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:42:56,145 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:42:56,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:42:56,146 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:42:56,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:42:56,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:42:56,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:42:56,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:42:56,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:42:56,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:42:56,148 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:42:56,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:42:56,148 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:42:56,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:42:56,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:42:56,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:42:56,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:42:56,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:42:56,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:42:56,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:42:56,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:42:56,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:42:56,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:42:56,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:42:56,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:42:56,151 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:42:56,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:42:56,151 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:42:56,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50de8acec85b0b2508f1f33521d9ab6717fa1b5141d6b9e2d08fcb4af894112b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:42:56,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:42:56,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:42:56,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:42:56,490 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:42:56,491 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:42:56,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-08-30 17:42:57,728 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:42:57,971 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:42:57,972 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-08-30 17:42:57,987 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75027af6/cc261a289e2d44f6a55b092e81a1818e/FLAGe3387714e [2023-08-30 17:42:58,004 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75027af6/cc261a289e2d44f6a55b092e81a1818e [2023-08-30 17:42:58,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:42:58,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:42:58,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:42:58,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:42:58,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:42:58,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36419903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58, skipping insertion in model container [2023-08-30 17:42:58,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:42:58,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:42:58,288 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i[30176,30189] [2023-08-30 17:42:58,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:42:58,335 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:42:58,372 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i[30176,30189] [2023-08-30 17:42:58,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:42:58,431 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:42:58,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58 WrapperNode [2023-08-30 17:42:58,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:42:58,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:42:58,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:42:58,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:42:58,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,496 INFO L138 Inliner]: procedures = 172, calls = 37, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 202 [2023-08-30 17:42:58,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:42:58,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:42:58,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:42:58,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:42:58,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,546 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:42:58,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:42:58,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:42:58,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:42:58,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (1/1) ... [2023-08-30 17:42:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:42:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:42:58,596 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) [2023-08-30 17:42:58,605 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 [2023-08-30 17:42:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:42:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 17:42:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 17:42:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:42:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:42:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:42:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:42:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 17:42:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 17:42:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:42:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:42:58,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:42:58,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:42:58,633 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:42:58,759 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:42:58,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:42:59,063 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:42:59,070 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:42:59,071 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-30 17:42:59,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:42:59 BoogieIcfgContainer [2023-08-30 17:42:59,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:42:59,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:42:59,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:42:59,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:42:59,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:42:58" (1/3) ... [2023-08-30 17:42:59,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f6fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:42:59, skipping insertion in model container [2023-08-30 17:42:59,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:58" (2/3) ... [2023-08-30 17:42:59,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f6fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:42:59, skipping insertion in model container [2023-08-30 17:42:59,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:42:59" (3/3) ... [2023-08-30 17:42:59,080 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_04-munge_racefree.i [2023-08-30 17:42:59,102 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:42:59,110 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:42:59,110 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 17:42:59,111 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:42:59,186 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:42:59,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 200 transitions, 422 flow [2023-08-30 17:42:59,326 INFO L130 PetriNetUnfolder]: 58/358 cut-off events. [2023-08-30 17:42:59,327 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:42:59,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 358 events. 58/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1460 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-30 17:42:59,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 200 transitions, 422 flow [2023-08-30 17:42:59,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 200 transitions, 422 flow [2023-08-30 17:42:59,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:42:59,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 200 transitions, 422 flow [2023-08-30 17:42:59,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 200 transitions, 422 flow [2023-08-30 17:42:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 200 transitions, 422 flow [2023-08-30 17:42:59,465 INFO L130 PetriNetUnfolder]: 58/358 cut-off events. [2023-08-30 17:42:59,465 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:42:59,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 358 events. 58/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1460 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-30 17:42:59,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 15876 [2023-08-30 17:43:02,924 INFO L134 LiptonReduction]: Checked pairs total: 27843 [2023-08-30 17:43:02,925 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-30 17:43:02,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:43:02,953 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;@69abf870, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:02,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:43:02,968 INFO L130 PetriNetUnfolder]: 6/41 cut-off events. [2023-08-30 17:43:02,968 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:43:02,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:02,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:02,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:43:02,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:02,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1762064662, now seen corresponding path program 1 times [2023-08-30 17:43:02,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:02,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415218342] [2023-08-30 17:43:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:03,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415218342] [2023-08-30 17:43:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415218342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:43:03,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:43:03,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:43:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536522534] [2023-08-30 17:43:03,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:43:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:43:03,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:43:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:43:03,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 344 [2023-08-30 17:43:03,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 79 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2023-08-30 17:43:03,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:03,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 344 [2023-08-30 17:43:03,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:03,971 INFO L130 PetriNetUnfolder]: 3493/6215 cut-off events. [2023-08-30 17:43:03,972 INFO L131 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2023-08-30 17:43:03,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11906 conditions, 6215 events. 3493/6215 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 40962 event pairs, 1355 based on Foata normal form. 783/5800 useless extension candidates. Maximal degree in co-relation 10846. Up to 3639 conditions per place. [2023-08-30 17:43:03,993 INFO L137 encePairwiseOnDemand]: 319/344 looper letters, 54 selfloop transitions, 3 changer transitions 24/93 dead transitions. [2023-08-30 17:43:03,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 383 flow [2023-08-30 17:43:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:43:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:43:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 17:43:04,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2023-08-30 17:43:04,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 17:43:04,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 17:43:04,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:04,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 17:43:04,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2023-08-30 17:43:04,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-08-30 17:43:04,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 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) [2023-08-30 17:43:04,025 INFO L175 Difference]: Start difference. First operand has 58 places, 79 transitions, 180 flow. Second operand 3 states and 597 transitions. [2023-08-30 17:43:04,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 383 flow [2023-08-30 17:43:04,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 93 transitions, 383 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:43:04,035 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 141 flow [2023-08-30 17:43:04,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-30 17:43:04,040 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 17:43:04,040 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 141 flow [2023-08-30 17:43:04,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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) [2023-08-30 17:43:04,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:04,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:04,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:43:04,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:43:04,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 266721376, now seen corresponding path program 1 times [2023-08-30 17:43:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:04,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056704368] [2023-08-30 17:43:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:04,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:04,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056704368] [2023-08-30 17:43:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056704368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:43:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147981064] [2023-08-30 17:43:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:04,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:04,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:43:04,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:43:04,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:43:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:43:04,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:43:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:04,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:43:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147981064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:43:04,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:43:04,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:43:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771521673] [2023-08-30 17:43:04,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:43:04,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:43:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:43:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:43:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 344 [2023-08-30 17:43:04,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 141 flow. Second operand has 7 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 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) [2023-08-30 17:43:04,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:04,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 344 [2023-08-30 17:43:04,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:04,470 INFO L130 PetriNetUnfolder]: 18/56 cut-off events. [2023-08-30 17:43:04,470 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:43:04,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 56 events. 18/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 111. Up to 38 conditions per place. [2023-08-30 17:43:04,471 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-30 17:43:04,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 113 flow [2023-08-30 17:43:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:43:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:43:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-30 17:43:04,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48619186046511625 [2023-08-30 17:43:04,474 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-30 17:43:04,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-30 17:43:04,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:04,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-30 17:43:04,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 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) [2023-08-30 17:43:04,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 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) [2023-08-30 17:43:04,484 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 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) [2023-08-30 17:43:04,484 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 141 flow. Second operand 4 states and 669 transitions. [2023-08-30 17:43:04,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 113 flow [2023-08-30 17:43:04,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 107 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:43:04,495 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-30 17:43:04,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-30 17:43:04,496 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -32 predicate places. [2023-08-30 17:43:04,496 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-30 17:43:04,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 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) [2023-08-30 17:43:04,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:43:04,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:43:04,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:43:04,500 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:43:04,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:43:04,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:04,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:43:04,710 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:43:04,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 200 transitions, 422 flow [2023-08-30 17:43:04,772 INFO L130 PetriNetUnfolder]: 58/358 cut-off events. [2023-08-30 17:43:04,773 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:43:04,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 358 events. 58/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1460 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-30 17:43:04,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 200 transitions, 422 flow [2023-08-30 17:43:04,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 200 transitions, 422 flow [2023-08-30 17:43:04,778 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:43:04,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 200 transitions, 422 flow [2023-08-30 17:43:04,779 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 200 transitions, 422 flow [2023-08-30 17:43:04,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 200 transitions, 422 flow [2023-08-30 17:43:04,812 INFO L130 PetriNetUnfolder]: 58/358 cut-off events. [2023-08-30 17:43:04,812 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:43:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 358 events. 58/358 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1460 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-30 17:43:04,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 15876 [2023-08-30 17:43:07,925 INFO L134 LiptonReduction]: Checked pairs total: 27843 [2023-08-30 17:43:07,926 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-30 17:43:07,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:43:07,933 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;@69abf870, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:07,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 17:43:07,937 INFO L130 PetriNetUnfolder]: 2/29 cut-off events. [2023-08-30 17:43:07,937 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:43:07,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:07,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:43:07,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:43:07,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1915609587, now seen corresponding path program 1 times [2023-08-30 17:43:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:07,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025760905] [2023-08-30 17:43:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:07,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:43:07,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:43:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:43:08,011 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:43:08,011 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:43:08,014 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 17:43:08,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 17:43:08,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:43:08,016 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:43:08,017 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 17:43:08,018 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:43:08,018 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:43:08,095 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 17:43:08,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 314 transitions, 676 flow [2023-08-30 17:43:08,246 INFO L130 PetriNetUnfolder]: 197/1046 cut-off events. [2023-08-30 17:43:08,246 INFO L131 PetriNetUnfolder]: For 72/75 co-relation queries the response was YES. [2023-08-30 17:43:08,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 1046 events. 197/1046 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6040 event pairs, 1 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 647. Up to 32 conditions per place. [2023-08-30 17:43:08,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 314 transitions, 676 flow [2023-08-30 17:43:08,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 314 transitions, 676 flow [2023-08-30 17:43:08,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:43:08,271 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 314 transitions, 676 flow [2023-08-30 17:43:08,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 314 transitions, 676 flow [2023-08-30 17:43:08,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 314 transitions, 676 flow [2023-08-30 17:43:08,420 INFO L130 PetriNetUnfolder]: 197/1046 cut-off events. [2023-08-30 17:43:08,420 INFO L131 PetriNetUnfolder]: For 72/75 co-relation queries the response was YES. [2023-08-30 17:43:08,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 1046 events. 197/1046 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6040 event pairs, 1 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 647. Up to 32 conditions per place. [2023-08-30 17:43:08,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 57240 [2023-08-30 17:43:11,777 INFO L134 LiptonReduction]: Checked pairs total: 138468 [2023-08-30 17:43:11,777 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-30 17:43:11,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:43:11,780 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;@69abf870, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:11,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 17:43:11,783 INFO L130 PetriNetUnfolder]: 5/40 cut-off events. [2023-08-30 17:43:11,783 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:43:11,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:11,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:11,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 17:43:11,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1009026459, now seen corresponding path program 1 times [2023-08-30 17:43:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:11,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202989615] [2023-08-30 17:43:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:11,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:11,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202989615] [2023-08-30 17:43:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202989615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:43:11,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:43:11,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:43:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547842731] [2023-08-30 17:43:11,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:43:11,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:43:11,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:43:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:43:11,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 519 [2023-08-30 17:43:11,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 152 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 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) [2023-08-30 17:43:11,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:11,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 519 [2023-08-30 17:43:11,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand