./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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 ../sv-benchmarks/c/pthread-ext/09_fmaxsym.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 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:17:29,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:17:29,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:17:29,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:17:29,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:17:29,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:17:29,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:17:29,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:17:29,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:17:29,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:17:29,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:17:29,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:17:29,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:17:29,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:17:29,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:17:29,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:17:29,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:17:29,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:17:29,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:17:29,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:17:29,113 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:17:29,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:17:29,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:17:29,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:17:29,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:17:29,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:17:29,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:17:29,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:17:29,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:17:29,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:17:29,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:17:29,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:17:29,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:17:29,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:17:29,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:17:29,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:17:29,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:17:29,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:17:29,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:17:29,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:17:29,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:17:29,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:17:29,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:17:29,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:17:29,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:17:29,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:17:29,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:17:29,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:17:29,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:17:29,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:17:29,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:17:29,166 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:17:29,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:17:29,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:17:29,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:17:29,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:17:29,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:17:29,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:17:29,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:17:29,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:17:29,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:17:29,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:17:29,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:17:29,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:17:29,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:17:29,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:17:29,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:17:29,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:17:29,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:17:29,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:17:29,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:17:29,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:17:29,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:17:29,170 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:17:29,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:17:29,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:17:29,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 [2022-07-22 21:17:29,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:17:29,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:17:29,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:17:29,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:17:29,432 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:17:29,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-07-22 21:17:29,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e13bd31/a0986905bfde4980aa339e18e6bd7f65/FLAGceca0d467 [2022-07-22 21:17:29,895 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:17:29,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-07-22 21:17:29,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e13bd31/a0986905bfde4980aa339e18e6bd7f65/FLAGceca0d467 [2022-07-22 21:17:30,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e13bd31/a0986905bfde4980aa339e18e6bd7f65 [2022-07-22 21:17:30,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:17:30,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:17:30,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:17:30,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:17:30,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:17:30,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdda356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30, skipping insertion in model container [2022-07-22 21:17:30,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:17:30,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:17:30,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-07-22 21:17:30,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:17:30,634 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:17:30,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-07-22 21:17:30,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:17:30,725 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:17:30,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30 WrapperNode [2022-07-22 21:17:30,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:17:30,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:17:30,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:17:30,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:17:30,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,761 INFO L137 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2022-07-22 21:17:30,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:17:30,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:17:30,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:17:30,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:17:30,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:17:30,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:17:30,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:17:30,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:17:30,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (1/1) ... [2022-07-22 21:17:30,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:17:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:17:30,813 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) [2022-07-22 21:17:30,819 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 [2022-07-22 21:17:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:17:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:17:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:17:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:17:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:17:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:17:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:17:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:17:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:17:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:17:30,845 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:17:30,963 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:17:30,964 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:17:31,136 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:17:31,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:17:31,160 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:17:31,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:17:31 BoogieIcfgContainer [2022-07-22 21:17:31,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:17:31,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:17:31,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:17:31,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:17:31,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:17:30" (1/3) ... [2022-07-22 21:17:31,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68346bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:17:31, skipping insertion in model container [2022-07-22 21:17:31,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:30" (2/3) ... [2022-07-22 21:17:31,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68346bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:17:31, skipping insertion in model container [2022-07-22 21:17:31,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:17:31" (3/3) ... [2022-07-22 21:17:31,170 INFO L111 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2022-07-22 21:17:31,175 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:17:31,183 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:17:31,184 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:17:31,184 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:17:31,247 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:31,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-07-22 21:17:31,310 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2022-07-22 21:17:31,310 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:17:31,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2022-07-22 21:17:31,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-07-22 21:17:31,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-07-22 21:17:31,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:31,335 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1451dbbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5294080c [2022-07-22 21:17:31,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:17:31,364 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-22 21:17:31,364 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:17:31,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:31,365 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:31,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:17:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:31,375 INFO L85 PathProgramCache]: Analyzing trace with hash -848102093, now seen corresponding path program 1 times [2022-07-22 21:17:31,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525704279] [2022-07-22 21:17:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:31,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:31,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:31,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:31,585 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:31,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:17:31,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:17:31,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:17:31,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:17:31,589 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:17:31,592 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:31,592 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:17:31,626 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:31,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 121 transitions, 254 flow [2022-07-22 21:17:31,677 INFO L129 PetriNetUnfolder]: 13/145 cut-off events. [2022-07-22 21:17:31,677 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:17:31,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 248 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-07-22 21:17:31,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 121 transitions, 254 flow [2022-07-22 21:17:31,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 121 transitions, 254 flow [2022-07-22 21:17:31,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:31,684 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1451dbbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5294080c [2022-07-22 21:17:31,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:17:31,695 INFO L129 PetriNetUnfolder]: 4/81 cut-off events. [2022-07-22 21:17:31,695 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:17:31,696 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:31,696 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:31,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:17:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash -657842238, now seen corresponding path program 1 times [2022-07-22 21:17:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:31,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498525566] [2022-07-22 21:17:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:31,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:31,726 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:31,747 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:31,748 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:31,748 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:17:31,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:17:31,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:17:31,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:17:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:17:31,749 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:17:31,750 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:31,750 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:17:31,779 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:31,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 163 transitions, 347 flow [2022-07-22 21:17:31,813 INFO L129 PetriNetUnfolder]: 19/200 cut-off events. [2022-07-22 21:17:31,813 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:17:31,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 200 events. 19/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 466 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2022-07-22 21:17:31,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 163 transitions, 347 flow [2022-07-22 21:17:31,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 163 transitions, 347 flow [2022-07-22 21:17:31,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:31,820 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1451dbbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5294080c [2022-07-22 21:17:31,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:17:31,836 INFO L129 PetriNetUnfolder]: 7/122 cut-off events. [2022-07-22 21:17:31,836 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:17:31,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:31,836 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:31,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:17:31,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:31,837 INFO L85 PathProgramCache]: Analyzing trace with hash 778969070, now seen corresponding path program 1 times [2022-07-22 21:17:31,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451344920] [2022-07-22 21:17:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:31,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:31,893 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:31,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:31,945 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:31,946 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:17:31,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:17:31,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:17:31,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:17:31,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:17:31,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:17:31,947 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:17:31,948 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:31,948 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:17:31,993 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:32,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 442 flow [2022-07-22 21:17:32,065 INFO L129 PetriNetUnfolder]: 25/255 cut-off events. [2022-07-22 21:17:32,065 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:17:32,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 717 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2022-07-22 21:17:32,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 205 transitions, 442 flow [2022-07-22 21:17:32,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 205 transitions, 442 flow [2022-07-22 21:17:32,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:32,083 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1451dbbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5294080c [2022-07-22 21:17:32,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:17:32,106 INFO L129 PetriNetUnfolder]: 11/158 cut-off events. [2022-07-22 21:17:32,106 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:17:32,106 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:32,107 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:32,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:17:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2042769993, now seen corresponding path program 1 times [2022-07-22 21:17:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452076624] [2022-07-22 21:17:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:17:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:32,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452076624] [2022-07-22 21:17:32,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452076624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:32,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:32,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:17:32,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70247939] [2022-07-22 21:17:32,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:32,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:17:32,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:17:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:17:32,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 205 [2022-07-22 21:17:32,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 205 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:32,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:32,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 205 [2022-07-22 21:17:32,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:37,672 INFO L129 PetriNetUnfolder]: 17933/36310 cut-off events. [2022-07-22 21:17:37,672 INFO L130 PetriNetUnfolder]: For 7000/7000 co-relation queries the response was YES. [2022-07-22 21:17:37,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63021 conditions, 36310 events. 17933/36310 cut-off events. For 7000/7000 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 358904 event pairs, 8601 based on Foata normal form. 13285/41120 useless extension candidates. Maximal degree in co-relation 26344. Up to 17536 conditions per place. [2022-07-22 21:17:38,242 INFO L132 encePairwiseOnDemand]: 183/205 looper letters, 56 selfloop transitions, 7 changer transitions 0/209 dead transitions. [2022-07-22 21:17:38,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 209 transitions, 597 flow [2022-07-22 21:17:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:17:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:17:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2022-07-22 21:17:38,262 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8829268292682927 [2022-07-22 21:17:38,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2022-07-22 21:17:38,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2022-07-22 21:17:38,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:38,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2022-07-22 21:17:38,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:38,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:38,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:38,284 INFO L186 Difference]: Start difference. First operand has 193 places, 205 transitions, 442 flow. Second operand 3 states and 543 transitions. [2022-07-22 21:17:38,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 209 transitions, 597 flow [2022-07-22 21:17:38,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 209 transitions, 579 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-07-22 21:17:38,302 INFO L242 Difference]: Finished difference. Result has 187 places, 187 transitions, 434 flow [2022-07-22 21:17:38,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=434, PETRI_PLACES=187, PETRI_TRANSITIONS=187} [2022-07-22 21:17:38,307 INFO L279 CegarLoopForPetriNet]: 193 programPoint places, -6 predicate places. [2022-07-22 21:17:38,308 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 187 transitions, 434 flow [2022-07-22 21:17:38,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:38,309 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:38,309 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:38,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:17:38,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:17:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:38,310 INFO L85 PathProgramCache]: Analyzing trace with hash -178458285, now seen corresponding path program 1 times [2022-07-22 21:17:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:38,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156047094] [2022-07-22 21:17:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:38,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:38,352 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:38,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:38,381 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:38,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:17:38,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:17:38,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:17:38,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:17:38,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:17:38,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:17:38,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:17:38,383 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:17:38,384 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:38,385 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:17:38,427 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:38,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 247 transitions, 539 flow [2022-07-22 21:17:38,480 INFO L129 PetriNetUnfolder]: 31/310 cut-off events. [2022-07-22 21:17:38,481 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:17:38,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 310 events. 31/310 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 946 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 268. Up to 12 conditions per place. [2022-07-22 21:17:38,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 247 transitions, 539 flow [2022-07-22 21:17:38,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 247 transitions, 539 flow [2022-07-22 21:17:38,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:38,495 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1451dbbc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5294080c [2022-07-22 21:17:38,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:17:38,509 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2022-07-22 21:17:38,509 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:17:38,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:38,509 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:38,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:17:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:38,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1667299278, now seen corresponding path program 1 times [2022-07-22 21:17:38,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:38,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145182182] [2022-07-22 21:17:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:17:38,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:38,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145182182] [2022-07-22 21:17:38,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145182182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:38,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:38,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:17:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606137200] [2022-07-22 21:17:38,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:38,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:17:38,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:17:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:17:38,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 247 [2022-07-22 21:17:38,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 247 transitions, 539 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:38,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:38,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 247 [2022-07-22 21:17:38,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand