./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.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/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 --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 16:25:02,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:25:02,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:25:02,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:25:02,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:25:02,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:25:02,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:25:02,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:25:02,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:25:02,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:25:02,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:25:02,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:25:02,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:25:02,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:25:02,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:25:02,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:25:02,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:25:02,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:25:02,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:25:02,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:25:02,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:25:02,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:25:02,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:25:02,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:25:02,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:25:02,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:25:02,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:25:02,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:25:02,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:25:02,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:25:02,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:25:02,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:25:02,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:25:02,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:25:02,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:25:02,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:25:02,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:25:02,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:25:02,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:25:02,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:25:02,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:25:02,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:25:02,711 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:25:02,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:25:02,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:25:02,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:25:02,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:25:02,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:25:02,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:25:02,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:25:02,713 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:25:02,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:25:02,713 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:25:02,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:25:02,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:25:02,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:25:02,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:25:02,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:25:02,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:25:02,715 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:25:02,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:25:02,715 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:25:02,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:25:02,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:25:02,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:25:02,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:25:02,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:25:02,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:25:02,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:25:02,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:25:02,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:25:02,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:25:02,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:25:02,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:25:02,717 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:25:02,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:25:02,718 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:25:02,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:25:02,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:25:02,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:25:02,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:25:02,943 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:25:02,943 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:25:02,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-08-30 16:25:04,059 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:25:04,265 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:25:04,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-08-30 16:25:04,281 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0706bf0/1a790b6d55224b0387a392324e10a488/FLAG129dd36da [2023-08-30 16:25:04,295 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0706bf0/1a790b6d55224b0387a392324e10a488 [2023-08-30 16:25:04,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:25:04,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:25:04,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:25:04,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:25:04,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:25:04,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc4eff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04, skipping insertion in model container [2023-08-30 16:25:04,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:25:04,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:25:04,576 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-08-30 16:25:04,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:25:04,591 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:25:04,630 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-08-30 16:25:04,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:25:04,666 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:25:04,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04 WrapperNode [2023-08-30 16:25:04,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:25:04,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:25:04,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:25:04,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:25:04,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,711 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2023-08-30 16:25:04,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:25:04,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:25:04,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:25:04,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:25:04,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:25:04,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:25:04,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:25:04,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:25:04,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (1/1) ... [2023-08-30 16:25:04,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:25:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:04,773 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 16:25:04,795 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 16:25:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:25:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:25:04,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:25:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:25:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:25:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:25:04,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:25:04,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:25:04,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:25:04,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:25:04,808 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 16:25:04,889 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:25:04,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:25:04,998 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:25:05,021 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:25:05,021 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:25:05,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:25:05 BoogieIcfgContainer [2023-08-30 16:25:05,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:25:05,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:25:05,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:25:05,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:25:05,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:25:04" (1/3) ... [2023-08-30 16:25:05,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b843c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:25:05, skipping insertion in model container [2023-08-30 16:25:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:25:04" (2/3) ... [2023-08-30 16:25:05,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b843c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:25:05, skipping insertion in model container [2023-08-30 16:25:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:25:05" (3/3) ... [2023-08-30 16:25:05,028 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-08-30 16:25:05,032 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:25:05,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:25:05,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:25:05,038 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:25:05,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:25:05,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:05,184 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-08-30 16:25:05,184 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:05,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-30 16:25:05,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:05,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:05,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:05,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:05,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:05,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:05,215 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-08-30 16:25:05,215 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:05,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-30 16:25:05,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-30 16:25:07,194 INFO L134 LiptonReduction]: Checked pairs total: 1018 [2023-08-30 16:25:07,194 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-30 16:25:07,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:25:07,214 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;@67933e49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:07,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:25:07,217 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-08-30 16:25:07,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:07,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:07,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:25:07,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:07,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash 339243402, now seen corresponding path program 1 times [2023-08-30 16:25:07,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:07,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503552814] [2023-08-30 16:25:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:07,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:07,382 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 16:25:07,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:07,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503552814] [2023-08-30 16:25:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503552814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:25:07,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844241808] [2023-08-30 16:25:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:25:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:25:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:25:07,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 149 [2023-08-30 16:25:07,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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 16:25:07,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:07,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 149 [2023-08-30 16:25:07,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:07,431 INFO L130 PetriNetUnfolder]: 7/19 cut-off events. [2023-08-30 16:25:07,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:07,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-08-30 16:25:07,433 INFO L137 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-30 16:25:07,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-08-30 16:25:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:25:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:25:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 135 transitions. [2023-08-30 16:25:07,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45302013422818793 [2023-08-30 16:25:07,443 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 135 transitions. [2023-08-30 16:25:07,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 135 transitions. [2023-08-30 16:25:07,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:07,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 135 transitions. [2023-08-30 16:25:07,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 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 16:25:07,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 16:25:07,455 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 16:25:07,456 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 135 transitions. [2023-08-30 16:25:07,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-08-30 16:25:07,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:07,458 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-08-30 16:25:07,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-08-30 16:25:07,462 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-08-30 16:25:07,463 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-08-30 16:25:07,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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 16:25:07,464 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:25:07,465 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:25:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:25:07,465 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:25:07,468 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:25:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:07,498 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-08-30 16:25:07,499 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:07,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-30 16:25:07,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:07,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:07,502 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:07,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:07,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-08-30 16:25:07,508 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-08-30 16:25:07,508 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:07,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-08-30 16:25:07,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-30 16:25:09,182 INFO L134 LiptonReduction]: Checked pairs total: 1008 [2023-08-30 16:25:09,182 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-30 16:25:09,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:25:09,184 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;@67933e49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:09,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:25:09,186 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-08-30 16:25:09,186 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:25:09,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:09,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 16:25:09,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:25:09,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -62301113, now seen corresponding path program 1 times [2023-08-30 16:25:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:09,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970982219] [2023-08-30 16:25:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:25:09,209 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:25:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:25:09,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:25:09,235 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:25:09,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:25:09,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:25:09,236 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:25:09,236 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:25:09,237 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:25:09,237 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:25:09,251 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:25:09,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:09,266 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-08-30 16:25:09,269 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:25:09,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-30 16:25:09,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:09,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:09,272 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:09,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:09,272 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:09,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:09,283 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-08-30 16:25:09,288 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:25:09,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-30 16:25:09,292 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-08-30 16:25:10,641 INFO L134 LiptonReduction]: Checked pairs total: 8769 [2023-08-30 16:25:10,641 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-30 16:25:10,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:25:10,643 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;@67933e49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:10,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:25:10,646 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 16:25:10,646 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:25:10,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:10,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:10,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:10,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1422340461, now seen corresponding path program 1 times [2023-08-30 16:25:10,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81759131] [2023-08-30 16:25:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:10,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:10,714 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 16:25:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81759131] [2023-08-30 16:25:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81759131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:10,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:25:10,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266757520] [2023-08-30 16:25:10,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:10,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:10,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 212 [2023-08-30 16:25:10,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 16:25:10,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:10,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 212 [2023-08-30 16:25:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:10,824 INFO L130 PetriNetUnfolder]: 340/593 cut-off events. [2023-08-30 16:25:10,824 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 16:25:10,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 593 events. 340/593 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2740 event pairs, 144 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 720. Up to 351 conditions per place. [2023-08-30 16:25:10,827 INFO L137 encePairwiseOnDemand]: 205/212 looper letters, 30 selfloop transitions, 5 changer transitions 1/41 dead transitions. [2023-08-30 16:25:10,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 171 flow [2023-08-30 16:25:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-08-30 16:25:10,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2023-08-30 16:25:10,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-08-30 16:25:10,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-08-30 16:25:10,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:10,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-08-30 16:25:10,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 16:25:10,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:25:10,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:25:10,833 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 294 transitions. [2023-08-30 16:25:10,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 171 flow [2023-08-30 16:25:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 169 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:10,835 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2023-08-30 16:25:10,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-30 16:25:10,835 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-30 16:25:10,836 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2023-08-30 16:25:10,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 16:25:10,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:10,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:10,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:25:10,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:10,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash -646009066, now seen corresponding path program 1 times [2023-08-30 16:25:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:10,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627960535] [2023-08-30 16:25:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:10,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:10,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627960535] [2023-08-30 16:25:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627960535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:10,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:10,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:25:10,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898270947] [2023-08-30 16:25:10,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:10,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:10,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 212 [2023-08-30 16:25:10,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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 16:25:10,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:10,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 212 [2023-08-30 16:25:10,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:10,955 INFO L130 PetriNetUnfolder]: 456/760 cut-off events. [2023-08-30 16:25:10,955 INFO L131 PetriNetUnfolder]: For 254/254 co-relation queries the response was YES. [2023-08-30 16:25:10,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1778 conditions, 760 events. 456/760 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3581 event pairs, 196 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 612. Up to 451 conditions per place. [2023-08-30 16:25:10,958 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 32 selfloop transitions, 6 changer transitions 2/45 dead transitions. [2023-08-30 16:25:10,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 226 flow [2023-08-30 16:25:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-08-30 16:25:10,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2023-08-30 16:25:10,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-08-30 16:25:10,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-08-30 16:25:10,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:10,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-08-30 16:25:10,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 16:25:10,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:25:10,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:25:10,965 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 98 flow. Second operand 3 states and 291 transitions. [2023-08-30 16:25:10,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 226 flow [2023-08-30 16:25:10,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:25:10,968 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 128 flow [2023-08-30 16:25:10,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-30 16:25:10,970 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-30 16:25:10,970 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 128 flow [2023-08-30 16:25:10,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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 16:25:10,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:10,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:25:10,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:10,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash -719261112, now seen corresponding path program 1 times [2023-08-30 16:25:10,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:10,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446579675] [2023-08-30 16:25:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446579675] [2023-08-30 16:25:11,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446579675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:11,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436633693] [2023-08-30 16:25:11,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:11,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-30 16:25:11,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:11,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:11,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-30 16:25:11,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:11,289 INFO L130 PetriNetUnfolder]: 727/1198 cut-off events. [2023-08-30 16:25:11,289 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2023-08-30 16:25:11,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 1198 events. 727/1198 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6026 event pairs, 227 based on Foata normal form. 0/1177 useless extension candidates. Maximal degree in co-relation 2454. Up to 538 conditions per place. [2023-08-30 16:25:11,293 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 54 selfloop transitions, 16 changer transitions 6/79 dead transitions. [2023-08-30 16:25:11,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 79 transitions, 445 flow [2023-08-30 16:25:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:25:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:25:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2023-08-30 16:25:11,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229559748427673 [2023-08-30 16:25:11,295 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2023-08-30 16:25:11,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2023-08-30 16:25:11,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:11,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2023-08-30 16:25:11,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 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 16:25:11,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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 16:25:11,299 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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 16:25:11,299 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 128 flow. Second operand 6 states and 538 transitions. [2023-08-30 16:25:11,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 79 transitions, 445 flow [2023-08-30 16:25:11,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 415 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:25:11,301 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 240 flow [2023-08-30 16:25:11,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-30 16:25:11,302 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-30 16:25:11,302 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 240 flow [2023-08-30 16:25:11,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:11,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:11,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:11,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:25:11,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:11,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash -822908724, now seen corresponding path program 2 times [2023-08-30 16:25:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:11,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847590665] [2023-08-30 16:25:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:11,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:11,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847590665] [2023-08-30 16:25:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847590665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:11,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:11,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:11,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770610133] [2023-08-30 16:25:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:11,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:11,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:11,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-30 16:25:11,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:11,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:11,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-30 16:25:11,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:11,589 INFO L130 PetriNetUnfolder]: 1059/1750 cut-off events. [2023-08-30 16:25:11,589 INFO L131 PetriNetUnfolder]: For 1856/1856 co-relation queries the response was YES. [2023-08-30 16:25:11,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1750 events. 1059/1750 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9501 event pairs, 481 based on Foata normal form. 22/1764 useless extension candidates. Maximal degree in co-relation 4470. Up to 1140 conditions per place. [2023-08-30 16:25:11,596 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 65 selfloop transitions, 37 changer transitions 5/110 dead transitions. [2023-08-30 16:25:11,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 795 flow [2023-08-30 16:25:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:25:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:25:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 618 transitions. [2023-08-30 16:25:11,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164420485175202 [2023-08-30 16:25:11,598 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 618 transitions. [2023-08-30 16:25:11,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 618 transitions. [2023-08-30 16:25:11,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:11,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 618 transitions. [2023-08-30 16:25:11,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 16:25:11,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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 16:25:11,615 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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 16:25:11,615 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 240 flow. Second operand 7 states and 618 transitions. [2023-08-30 16:25:11,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 795 flow [2023-08-30 16:25:11,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 110 transitions, 795 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:11,619 INFO L231 Difference]: Finished difference. Result has 52 places, 76 transitions, 638 flow [2023-08-30 16:25:11,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=52, PETRI_TRANSITIONS=76} [2023-08-30 16:25:11,620 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-30 16:25:11,620 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 76 transitions, 638 flow [2023-08-30 16:25:11,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:11,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:11,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:25:11,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:11,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash -992714895, now seen corresponding path program 1 times [2023-08-30 16:25:11,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41191505] [2023-08-30 16:25:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:11,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:11,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41191505] [2023-08-30 16:25:11,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41191505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:11,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:11,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:11,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213987304] [2023-08-30 16:25:11,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:11,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:11,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-30 16:25:11,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 76 transitions, 638 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:11,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:11,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-30 16:25:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:11,923 INFO L130 PetriNetUnfolder]: 1317/2184 cut-off events. [2023-08-30 16:25:11,924 INFO L131 PetriNetUnfolder]: For 4282/4282 co-relation queries the response was YES. [2023-08-30 16:25:11,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 2184 events. 1317/2184 cut-off events. For 4282/4282 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12695 event pairs, 701 based on Foata normal form. 22/2199 useless extension candidates. Maximal degree in co-relation 6668. Up to 1724 conditions per place. [2023-08-30 16:25:11,933 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 101 selfloop transitions, 22 changer transitions 5/131 dead transitions. [2023-08-30 16:25:11,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 131 transitions, 1173 flow [2023-08-30 16:25:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:25:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:25:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-08-30 16:25:11,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171159029649596 [2023-08-30 16:25:11,935 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-08-30 16:25:11,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-08-30 16:25:11,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:11,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-08-30 16:25:11,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 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 16:25:11,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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 16:25:11,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 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 16:25:11,938 INFO L175 Difference]: Start difference. First operand has 52 places, 76 transitions, 638 flow. Second operand 7 states and 619 transitions. [2023-08-30 16:25:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 131 transitions, 1173 flow [2023-08-30 16:25:11,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 131 transitions, 1169 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:11,947 INFO L231 Difference]: Finished difference. Result has 62 places, 98 transitions, 904 flow [2023-08-30 16:25:11,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=62, PETRI_TRANSITIONS=98} [2023-08-30 16:25:11,948 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2023-08-30 16:25:11,948 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 98 transitions, 904 flow [2023-08-30 16:25:11,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:11,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:11,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:11,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:25:11,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:11,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash -822015939, now seen corresponding path program 2 times [2023-08-30 16:25:11,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:11,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74594338] [2023-08-30 16:25:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:11,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74594338] [2023-08-30 16:25:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74594338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873204437] [2023-08-30 16:25:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:12,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-08-30 16:25:12,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 98 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:12,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:12,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-08-30 16:25:12,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:12,269 INFO L130 PetriNetUnfolder]: 1617/2676 cut-off events. [2023-08-30 16:25:12,269 INFO L131 PetriNetUnfolder]: For 6922/6922 co-relation queries the response was YES. [2023-08-30 16:25:12,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 2676 events. 1617/2676 cut-off events. For 6922/6922 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16266 event pairs, 441 based on Foata normal form. 22/2690 useless extension candidates. Maximal degree in co-relation 9216. Up to 1182 conditions per place. [2023-08-30 16:25:12,281 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 105 selfloop transitions, 51 changer transitions 6/165 dead transitions. [2023-08-30 16:25:12,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 165 transitions, 1715 flow [2023-08-30 16:25:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:25:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:25:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2023-08-30 16:25:12,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221698113207547 [2023-08-30 16:25:12,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2023-08-30 16:25:12,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2023-08-30 16:25:12,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:12,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2023-08-30 16:25:12,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 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 16:25:12,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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 16:25:12,286 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 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 16:25:12,286 INFO L175 Difference]: Start difference. First operand has 62 places, 98 transitions, 904 flow. Second operand 6 states and 537 transitions. [2023-08-30 16:25:12,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 165 transitions, 1715 flow [2023-08-30 16:25:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 165 transitions, 1665 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:12,304 INFO L231 Difference]: Finished difference. Result has 72 places, 123 transitions, 1333 flow [2023-08-30 16:25:12,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1333, PETRI_PLACES=72, PETRI_TRANSITIONS=123} [2023-08-30 16:25:12,305 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-08-30 16:25:12,305 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 123 transitions, 1333 flow [2023-08-30 16:25:12,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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 16:25:12,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:12,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:25:12,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:12,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:12,306 INFO L85 PathProgramCache]: Analyzing trace with hash 447898056, now seen corresponding path program 1 times [2023-08-30 16:25:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:12,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662690262] [2023-08-30 16:25:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:12,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:12,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:12,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662690262] [2023-08-30 16:25:12,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662690262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:12,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:12,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:25:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330523703] [2023-08-30 16:25:12,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:12,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 212 [2023-08-30 16:25:12,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 123 transitions, 1333 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 16:25:12,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:12,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 212 [2023-08-30 16:25:12,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:12,507 INFO L130 PetriNetUnfolder]: 668/1209 cut-off events. [2023-08-30 16:25:12,508 INFO L131 PetriNetUnfolder]: For 4240/4244 co-relation queries the response was YES. [2023-08-30 16:25:12,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4710 conditions, 1209 events. 668/1209 cut-off events. For 4240/4244 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6488 event pairs, 310 based on Foata normal form. 4/1202 useless extension candidates. Maximal degree in co-relation 4618. Up to 799 conditions per place. [2023-08-30 16:25:12,512 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 0 selfloop transitions, 0 changer transitions 103/103 dead transitions. [2023-08-30 16:25:12,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 1116 flow [2023-08-30 16:25:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-30 16:25:12,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2023-08-30 16:25:12,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-30 16:25:12,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-30 16:25:12,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:12,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-30 16:25:12,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 16:25:12,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:25:12,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:25:12,515 INFO L175 Difference]: Start difference. First operand has 72 places, 123 transitions, 1333 flow. Second operand 3 states and 310 transitions. [2023-08-30 16:25:12,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 1116 flow [2023-08-30 16:25:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 967 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-08-30 16:25:12,525 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-30 16:25:12,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-30 16:25:12,526 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-08-30 16:25:12,526 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-30 16:25:12,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 16:25:12,526 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:25:12,526 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:25:12,527 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:25:12,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:25:12,527 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-30 16:25:12,527 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:25:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:12,534 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-08-30 16:25:12,535 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:25:12,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-30 16:25:12,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:12,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:12,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:12,536 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:12,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:12,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-08-30 16:25:12,542 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-08-30 16:25:12,542 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:25:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-08-30 16:25:12,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-08-30 16:25:13,950 INFO L134 LiptonReduction]: Checked pairs total: 8245 [2023-08-30 16:25:13,950 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-30 16:25:13,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:25:13,952 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;@67933e49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:13,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:25:13,954 INFO L130 PetriNetUnfolder]: 2/27 cut-off events. [2023-08-30 16:25:13,954 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:25:13,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:13,954 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 16:25:13,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:25:13,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1514129062, now seen corresponding path program 1 times [2023-08-30 16:25:13,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:13,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282203990] [2023-08-30 16:25:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:13,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:25:13,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:25:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:25:13,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:25:13,983 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:25:13,983 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:25:13,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:25:13,983 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:25:13,984 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:25:13,984 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:25:13,984 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:25:14,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:25:14,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-08-30 16:25:14,023 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-08-30 16:25:14,023 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:25:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-08-30 16:25:14,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 150 transitions, 321 flow [2023-08-30 16:25:14,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 150 transitions, 321 flow [2023-08-30 16:25:14,025 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:14,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 150 transitions, 321 flow [2023-08-30 16:25:14,025 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 150 transitions, 321 flow [2023-08-30 16:25:14,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-08-30 16:25:14,037 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-08-30 16:25:14,037 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:25:14,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-08-30 16:25:14,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 11856 [2023-08-30 16:25:15,787 INFO L134 LiptonReduction]: Checked pairs total: 20368 [2023-08-30 16:25:15,787 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-30 16:25:15,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:25:15,789 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;@67933e49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:15,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:25:15,791 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 16:25:15,791 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:25:15,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:15,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:15,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:15,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash -26515803, now seen corresponding path program 1 times [2023-08-30 16:25:15,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:15,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617501110] [2023-08-30 16:25:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:15,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:15,809 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 16:25:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617501110] [2023-08-30 16:25:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617501110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:15,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:15,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:25:15,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603859999] [2023-08-30 16:25:15,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:15,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:15,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 288 [2023-08-30 16:25:15,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 16:25:15,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:15,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 288 [2023-08-30 16:25:15,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:16,192 INFO L130 PetriNetUnfolder]: 4700/6828 cut-off events. [2023-08-30 16:25:16,192 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-08-30 16:25:16,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13733 conditions, 6828 events. 4700/6828 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39057 event pairs, 2158 based on Foata normal form. 0/5220 useless extension candidates. Maximal degree in co-relation 1512. Up to 4275 conditions per place. [2023-08-30 16:25:16,272 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 48 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-08-30 16:25:16,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 263 flow [2023-08-30 16:25:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-30 16:25:16,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-30 16:25:16,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-30 16:25:16,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-30 16:25:16,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:16,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-30 16:25:16,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 16:25:16,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:16,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:16,276 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 405 transitions. [2023-08-30 16:25:16,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 263 flow [2023-08-30 16:25:16,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 255 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:16,278 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2023-08-30 16:25:16,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-30 16:25:16,279 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-30 16:25:16,279 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2023-08-30 16:25:16,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 16:25:16,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:16,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:16,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:25:16,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:16,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1801319534, now seen corresponding path program 1 times [2023-08-30 16:25:16,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:16,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388704207] [2023-08-30 16:25:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:16,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:16,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388704207] [2023-08-30 16:25:16,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388704207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:16,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:16,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:25:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424564104] [2023-08-30 16:25:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:16,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 288 [2023-08-30 16:25:16,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 16:25:16,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:16,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 288 [2023-08-30 16:25:16,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:16,954 INFO L130 PetriNetUnfolder]: 7504/10741 cut-off events. [2023-08-30 16:25:16,960 INFO L131 PetriNetUnfolder]: For 3860/3860 co-relation queries the response was YES. [2023-08-30 16:25:16,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24375 conditions, 10741 events. 7504/10741 cut-off events. For 3860/3860 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63036 event pairs, 3211 based on Foata normal form. 0/9055 useless extension candidates. Maximal degree in co-relation 9265. Up to 6206 conditions per place. [2023-08-30 16:25:17,005 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 53 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-08-30 16:25:17,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 336 flow [2023-08-30 16:25:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 16:25:17,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664351851851852 [2023-08-30 16:25:17,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 16:25:17,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 16:25:17,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:17,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 16:25:17,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 16:25:17,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:17,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:17,011 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 403 transitions. [2023-08-30 16:25:17,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 336 flow [2023-08-30 16:25:17,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:25:17,016 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2023-08-30 16:25:17,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-30 16:25:17,017 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-30 16:25:17,017 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2023-08-30 16:25:17,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 16:25:17,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:17,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:17,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:25:17,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:17,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2131348444, now seen corresponding path program 1 times [2023-08-30 16:25:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580583355] [2023-08-30 16:25:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:17,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580583355] [2023-08-30 16:25:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580583355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:17,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:25:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185341179] [2023-08-30 16:25:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:17,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 288 [2023-08-30 16:25:17,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 16:25:17,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:17,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 288 [2023-08-30 16:25:17,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:17,988 INFO L130 PetriNetUnfolder]: 11080/15510 cut-off events. [2023-08-30 16:25:17,989 INFO L131 PetriNetUnfolder]: For 8210/8210 co-relation queries the response was YES. [2023-08-30 16:25:18,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38031 conditions, 15510 events. 11080/15510 cut-off events. For 8210/8210 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 92156 event pairs, 4841 based on Foata normal form. 0/13380 useless extension candidates. Maximal degree in co-relation 15449. Up to 9130 conditions per place. [2023-08-30 16:25:18,072 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 57 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-30 16:25:18,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 75 transitions, 419 flow [2023-08-30 16:25:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-30 16:25:18,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2023-08-30 16:25:18,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-30 16:25:18,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-30 16:25:18,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:18,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-30 16:25:18,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 16:25:18,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:18,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:18,078 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 181 flow. Second operand 3 states and 402 transitions. [2023-08-30 16:25:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 75 transitions, 419 flow [2023-08-30 16:25:18,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:25:18,093 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 251 flow [2023-08-30 16:25:18,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2023-08-30 16:25:18,094 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2023-08-30 16:25:18,094 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 251 flow [2023-08-30 16:25:18,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 16:25:18,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:18,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:18,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:25:18,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:18,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash -373153431, now seen corresponding path program 1 times [2023-08-30 16:25:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:18,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881528792] [2023-08-30 16:25:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:18,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881528792] [2023-08-30 16:25:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881528792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:18,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:18,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:18,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246527545] [2023-08-30 16:25:18,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:18,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:18,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:18,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:25:18,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:18,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:18,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:25:18,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:19,690 INFO L130 PetriNetUnfolder]: 19489/27491 cut-off events. [2023-08-30 16:25:19,690 INFO L131 PetriNetUnfolder]: For 19824/19872 co-relation queries the response was YES. [2023-08-30 16:25:19,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72395 conditions, 27491 events. 19489/27491 cut-off events. For 19824/19872 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 176830 event pairs, 6191 based on Foata normal form. 48/24560 useless extension candidates. Maximal degree in co-relation 60972. Up to 11226 conditions per place. [2023-08-30 16:25:19,807 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 134 selfloop transitions, 39 changer transitions 0/178 dead transitions. [2023-08-30 16:25:19,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 178 transitions, 1126 flow [2023-08-30 16:25:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:25:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:25:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 904 transitions. [2023-08-30 16:25:19,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-08-30 16:25:19,810 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 904 transitions. [2023-08-30 16:25:19,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 904 transitions. [2023-08-30 16:25:19,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:19,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 904 transitions. [2023-08-30 16:25:19,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.14285714285714) internal successors, (904), 7 states have internal predecessors, (904), 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 16:25:19,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:25:19,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:25:19,815 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 251 flow. Second operand 7 states and 904 transitions. [2023-08-30 16:25:19,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 178 transitions, 1126 flow [2023-08-30 16:25:19,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 178 transitions, 1058 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:25:19,966 INFO L231 Difference]: Finished difference. Result has 57 places, 84 transitions, 603 flow [2023-08-30 16:25:19,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=603, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2023-08-30 16:25:19,967 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-08-30 16:25:19,968 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 603 flow [2023-08-30 16:25:19,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:19,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:19,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:25:19,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:19,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1259429587, now seen corresponding path program 2 times [2023-08-30 16:25:19,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:19,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137951237] [2023-08-30 16:25:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:19,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:20,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:20,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137951237] [2023-08-30 16:25:20,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137951237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:20,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:20,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:20,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949493474] [2023-08-30 16:25:20,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:20,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:20,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:20,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:20,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:20,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:25:20,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:20,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:20,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:25:20,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:23,131 INFO L130 PetriNetUnfolder]: 30864/43840 cut-off events. [2023-08-30 16:25:23,132 INFO L131 PetriNetUnfolder]: For 69786/69802 co-relation queries the response was YES. [2023-08-30 16:25:23,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131996 conditions, 43840 events. 30864/43840 cut-off events. For 69786/69802 co-relation queries the response was YES. Maximal size of possible extension queue 1942. Compared 303486 event pairs, 13535 based on Foata normal form. 356/39848 useless extension candidates. Maximal degree in co-relation 119054. Up to 26270 conditions per place. [2023-08-30 16:25:23,349 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 178 selfloop transitions, 90 changer transitions 0/273 dead transitions. [2023-08-30 16:25:23,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 273 transitions, 2318 flow [2023-08-30 16:25:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:25:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:25:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1025 transitions. [2023-08-30 16:25:23,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448784722222222 [2023-08-30 16:25:23,352 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1025 transitions. [2023-08-30 16:25:23,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1025 transitions. [2023-08-30 16:25:23,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:23,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1025 transitions. [2023-08-30 16:25:23,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.125) internal successors, (1025), 8 states have internal predecessors, (1025), 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 16:25:23,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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 16:25:23,357 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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 16:25:23,357 INFO L175 Difference]: Start difference. First operand has 57 places, 84 transitions, 603 flow. Second operand 8 states and 1025 transitions. [2023-08-30 16:25:23,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 273 transitions, 2318 flow [2023-08-30 16:25:23,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 273 transitions, 2318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:23,620 INFO L231 Difference]: Finished difference. Result has 70 places, 169 transitions, 1838 flow [2023-08-30 16:25:23,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1838, PETRI_PLACES=70, PETRI_TRANSITIONS=169} [2023-08-30 16:25:23,620 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2023-08-30 16:25:23,621 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 169 transitions, 1838 flow [2023-08-30 16:25:23,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:23,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:23,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:23,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:25:23,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:23,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash -558021625, now seen corresponding path program 1 times [2023-08-30 16:25:23,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:23,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818980043] [2023-08-30 16:25:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:23,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:23,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:23,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818980043] [2023-08-30 16:25:23,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818980043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:23,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:23,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:23,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716837100] [2023-08-30 16:25:23,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:23,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:23,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:23,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:25:23,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 169 transitions, 1838 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:23,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:23,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:25:23,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:28,055 INFO L130 PetriNetUnfolder]: 41827/59604 cut-off events. [2023-08-30 16:25:28,055 INFO L131 PetriNetUnfolder]: For 170414/170436 co-relation queries the response was YES. [2023-08-30 16:25:28,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202741 conditions, 59604 events. 41827/59604 cut-off events. For 170414/170436 co-relation queries the response was YES. Maximal size of possible extension queue 2838. Compared 435900 event pairs, 21240 based on Foata normal form. 338/53694 useless extension candidates. Maximal degree in co-relation 188626. Up to 42623 conditions per place. [2023-08-30 16:25:28,679 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 269 selfloop transitions, 71 changer transitions 0/345 dead transitions. [2023-08-30 16:25:28,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 345 transitions, 3766 flow [2023-08-30 16:25:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:25:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:25:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1028 transitions. [2023-08-30 16:25:28,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461805555555556 [2023-08-30 16:25:28,682 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1028 transitions. [2023-08-30 16:25:28,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1028 transitions. [2023-08-30 16:25:28,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:28,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1028 transitions. [2023-08-30 16:25:28,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.5) internal successors, (1028), 8 states have internal predecessors, (1028), 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 16:25:28,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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 16:25:28,686 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 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 16:25:28,687 INFO L175 Difference]: Start difference. First operand has 70 places, 169 transitions, 1838 flow. Second operand 8 states and 1028 transitions. [2023-08-30 16:25:28,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 345 transitions, 3766 flow [2023-08-30 16:25:29,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 345 transitions, 3688 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:29,709 INFO L231 Difference]: Finished difference. Result has 83 places, 240 transitions, 2942 flow [2023-08-30 16:25:29,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2942, PETRI_PLACES=83, PETRI_TRANSITIONS=240} [2023-08-30 16:25:29,709 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2023-08-30 16:25:29,709 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 240 transitions, 2942 flow [2023-08-30 16:25:29,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:29,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:29,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:29,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:25:29,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:29,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1258536795, now seen corresponding path program 2 times [2023-08-30 16:25:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:29,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315274275] [2023-08-30 16:25:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:29,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:29,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315274275] [2023-08-30 16:25:29,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315274275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:29,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:29,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:29,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335074683] [2023-08-30 16:25:29,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:29,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:29,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:25:29,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 240 transitions, 2942 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:29,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:29,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:25:29,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:36,981 INFO L130 PetriNetUnfolder]: 54766/77698 cut-off events. [2023-08-30 16:25:36,981 INFO L131 PetriNetUnfolder]: For 305401/305449 co-relation queries the response was YES. [2023-08-30 16:25:37,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284129 conditions, 77698 events. 54766/77698 cut-off events. For 305401/305449 co-relation queries the response was YES. Maximal size of possible extension queue 3940. Compared 584297 event pairs, 16000 based on Foata normal form. 348/69442 useless extension candidates. Maximal degree in co-relation 268603. Up to 31891 conditions per place. [2023-08-30 16:25:37,870 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 268 selfloop transitions, 160 changer transitions 0/433 dead transitions. [2023-08-30 16:25:37,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 433 transitions, 5574 flow [2023-08-30 16:25:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:25:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:25:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 905 transitions. [2023-08-30 16:25:37,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489087301587302 [2023-08-30 16:25:37,873 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 905 transitions. [2023-08-30 16:25:37,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 905 transitions. [2023-08-30 16:25:37,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:37,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 905 transitions. [2023-08-30 16:25:37,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.28571428571428) internal successors, (905), 7 states have internal predecessors, (905), 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 16:25:37,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:25:37,877 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:25:37,877 INFO L175 Difference]: Start difference. First operand has 83 places, 240 transitions, 2942 flow. Second operand 7 states and 905 transitions. [2023-08-30 16:25:37,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 433 transitions, 5574 flow [2023-08-30 16:25:41,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 433 transitions, 5320 flow, removed 127 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:41,064 INFO L231 Difference]: Finished difference. Result has 95 places, 315 transitions, 4499 flow [2023-08-30 16:25:41,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4499, PETRI_PLACES=95, PETRI_TRANSITIONS=315} [2023-08-30 16:25:41,065 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2023-08-30 16:25:41,065 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 315 transitions, 4499 flow [2023-08-30 16:25:41,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 16:25:41,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:41,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:41,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:25:41,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:41,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1441415360, now seen corresponding path program 1 times [2023-08-30 16:25:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:41,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694805354] [2023-08-30 16:25:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:41,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:41,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694805354] [2023-08-30 16:25:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694805354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:41,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:41,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:25:41,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108237233] [2023-08-30 16:25:41,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:41,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:25:41,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:41,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:25:41,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:25:41,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2023-08-30 16:25:41,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 315 transitions, 4499 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 16:25:41,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:41,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2023-08-30 16:25:41,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:44,836 INFO L130 PetriNetUnfolder]: 24061/37396 cut-off events. [2023-08-30 16:25:44,837 INFO L131 PetriNetUnfolder]: For 207103/207281 co-relation queries the response was YES. [2023-08-30 16:25:44,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141741 conditions, 37396 events. 24061/37396 cut-off events. For 207103/207281 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 291790 event pairs, 11013 based on Foata normal form. 1250/33732 useless extension candidates. Maximal degree in co-relation 128523. Up to 22234 conditions per place. [2023-08-30 16:25:45,149 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 159 selfloop transitions, 37 changer transitions 0/295 dead transitions. [2023-08-30 16:25:45,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 295 transitions, 4196 flow [2023-08-30 16:25:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:25:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:25:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-30 16:25:45,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49189814814814814 [2023-08-30 16:25:45,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-30 16:25:45,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-30 16:25:45,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:45,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-30 16:25:45,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 16:25:45,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:45,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 16:25:45,154 INFO L175 Difference]: Start difference. First operand has 95 places, 315 transitions, 4499 flow. Second operand 3 states and 425 transitions. [2023-08-30 16:25:45,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 295 transitions, 4196 flow [2023-08-30 16:25:46,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 295 transitions, 3960 flow, removed 110 selfloop flow, removed 2 redundant places. [2023-08-30 16:25:46,712 INFO L231 Difference]: Finished difference. Result has 95 places, 219 transitions, 2828 flow [2023-08-30 16:25:46,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2828, PETRI_PLACES=95, PETRI_TRANSITIONS=219} [2023-08-30 16:25:46,713 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2023-08-30 16:25:46,713 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 219 transitions, 2828 flow [2023-08-30 16:25:46,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 16:25:46,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:46,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:46,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:25:46,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:46,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:46,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1341924707, now seen corresponding path program 1 times [2023-08-30 16:25:46,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:46,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662905870] [2023-08-30 16:25:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:46,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662905870] [2023-08-30 16:25:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662905870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:46,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:46,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399557010] [2023-08-30 16:25:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:46,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:46,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:25:46,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 219 transitions, 2828 flow. Second operand has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 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 16:25:46,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:46,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:25:46,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:52,845 INFO L130 PetriNetUnfolder]: 43794/64200 cut-off events. [2023-08-30 16:25:52,846 INFO L131 PetriNetUnfolder]: For 333304/333446 co-relation queries the response was YES. [2023-08-30 16:25:53,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248590 conditions, 64200 events. 43794/64200 cut-off events. For 333304/333446 co-relation queries the response was YES. Maximal size of possible extension queue 2653. Compared 487348 event pairs, 13652 based on Foata normal form. 702/56569 useless extension candidates. Maximal degree in co-relation 244217. Up to 25611 conditions per place. [2023-08-30 16:25:53,358 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 327 selfloop transitions, 166 changer transitions 0/503 dead transitions. [2023-08-30 16:25:53,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 503 transitions, 7050 flow [2023-08-30 16:25:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:25:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:25:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 894 transitions. [2023-08-30 16:25:53,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2023-08-30 16:25:53,361 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 894 transitions. [2023-08-30 16:25:53,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 894 transitions. [2023-08-30 16:25:53,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:53,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 894 transitions. [2023-08-30 16:25:53,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.71428571428571) internal successors, (894), 7 states have internal predecessors, (894), 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 16:25:53,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:25:53,364 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:25:53,365 INFO L175 Difference]: Start difference. First operand has 95 places, 219 transitions, 2828 flow. Second operand 7 states and 894 transitions. [2023-08-30 16:25:53,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 503 transitions, 7050 flow [2023-08-30 16:25:55,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 503 transitions, 6858 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-08-30 16:25:55,445 INFO L231 Difference]: Finished difference. Result has 106 places, 320 transitions, 4785 flow [2023-08-30 16:25:55,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4785, PETRI_PLACES=106, PETRI_TRANSITIONS=320} [2023-08-30 16:25:55,446 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2023-08-30 16:25:55,446 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 320 transitions, 4785 flow [2023-08-30 16:25:55,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 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 16:25:55,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:55,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:25:55,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:55,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash 218583753, now seen corresponding path program 1 times [2023-08-30 16:25:55,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:55,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462267463] [2023-08-30 16:25:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:55,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:55,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462267463] [2023-08-30 16:25:55,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462267463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:55,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:25:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788439121] [2023-08-30 16:25:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:55,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:55,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:25:55,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 320 transitions, 4785 flow. Second operand has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:25:55,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:55,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:25:55,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:04,641 INFO L130 PetriNetUnfolder]: 56045/82324 cut-off events. [2023-08-30 16:26:04,642 INFO L131 PetriNetUnfolder]: For 521036/521168 co-relation queries the response was YES. [2023-08-30 16:26:05,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341114 conditions, 82324 events. 56045/82324 cut-off events. For 521036/521168 co-relation queries the response was YES. Maximal size of possible extension queue 3714. Compared 647670 event pairs, 16991 based on Foata normal form. 666/72844 useless extension candidates. Maximal degree in co-relation 334781. Up to 32436 conditions per place. [2023-08-30 16:26:05,422 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 455 selfloop transitions, 160 changer transitions 0/625 dead transitions. [2023-08-30 16:26:05,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 625 transitions, 9954 flow [2023-08-30 16:26:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:26:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:26:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 892 transitions. [2023-08-30 16:26:05,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2023-08-30 16:26:05,424 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 892 transitions. [2023-08-30 16:26:05,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 892 transitions. [2023-08-30 16:26:05,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:05,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 892 transitions. [2023-08-30 16:26:05,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.42857142857143) internal successors, (892), 7 states have internal predecessors, (892), 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 16:26:05,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:26:05,430 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:26:05,430 INFO L175 Difference]: Start difference. First operand has 106 places, 320 transitions, 4785 flow. Second operand 7 states and 892 transitions. [2023-08-30 16:26:05,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 625 transitions, 9954 flow [2023-08-30 16:26:08,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 625 transitions, 9942 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 16:26:08,547 INFO L231 Difference]: Finished difference. Result has 118 places, 393 transitions, 6690 flow [2023-08-30 16:26:08,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6690, PETRI_PLACES=118, PETRI_TRANSITIONS=393} [2023-08-30 16:26:08,548 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2023-08-30 16:26:08,548 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 393 transitions, 6690 flow [2023-08-30 16:26:08,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:26:08,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:08,548 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:08,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:26:08,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:08,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash 651868521, now seen corresponding path program 1 times [2023-08-30 16:26:08,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:08,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161712112] [2023-08-30 16:26:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:26:08,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161712112] [2023-08-30 16:26:08,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161712112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:08,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:08,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:26:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153956884] [2023-08-30 16:26:08,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:08,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:26:08,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:26:08,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:26:08,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:26:08,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 393 transitions, 6690 flow. Second operand has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:26:08,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:08,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:26:08,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:23,087 INFO L130 PetriNetUnfolder]: 76740/113013 cut-off events. [2023-08-30 16:26:23,087 INFO L131 PetriNetUnfolder]: For 940914/941089 co-relation queries the response was YES. [2023-08-30 16:26:24,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502700 conditions, 113013 events. 76740/113013 cut-off events. For 940914/941089 co-relation queries the response was YES. Maximal size of possible extension queue 5111. Compared 931653 event pairs, 23286 based on Foata normal form. 1004/99937 useless extension candidates. Maximal degree in co-relation 492693. Up to 38387 conditions per place. [2023-08-30 16:26:24,452 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 555 selfloop transitions, 219 changer transitions 1/794 dead transitions. [2023-08-30 16:26:24,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 794 transitions, 14089 flow [2023-08-30 16:26:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:26:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:26:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 896 transitions. [2023-08-30 16:26:24,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 16:26:24,455 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 896 transitions. [2023-08-30 16:26:24,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 896 transitions. [2023-08-30 16:26:24,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:24,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 896 transitions. [2023-08-30 16:26:24,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 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 16:26:24,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:26:24,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:26:24,469 INFO L175 Difference]: Start difference. First operand has 118 places, 393 transitions, 6690 flow. Second operand 7 states and 896 transitions. [2023-08-30 16:26:24,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 794 transitions, 14089 flow [2023-08-30 16:26:32,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 794 transitions, 13919 flow, removed 85 selfloop flow, removed 0 redundant places. [2023-08-30 16:26:32,048 INFO L231 Difference]: Finished difference. Result has 130 places, 499 transitions, 9268 flow [2023-08-30 16:26:32,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9268, PETRI_PLACES=130, PETRI_TRANSITIONS=499} [2023-08-30 16:26:32,049 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 90 predicate places. [2023-08-30 16:26:32,049 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 499 transitions, 9268 flow [2023-08-30 16:26:32,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:26:32,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:32,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:32,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:26:32,050 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:32,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash 59114835, now seen corresponding path program 1 times [2023-08-30 16:26:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:32,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617871415] [2023-08-30 16:26:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:32,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:26:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617871415] [2023-08-30 16:26:32,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617871415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:32,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:26:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200567114] [2023-08-30 16:26:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:26:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:26:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:26:32,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 288 [2023-08-30 16:26:32,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 499 transitions, 9268 flow. Second operand has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:26:32,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:32,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 288 [2023-08-30 16:26:32,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:53,031 INFO L130 PetriNetUnfolder]: 95870/140943 cut-off events. [2023-08-30 16:26:53,031 INFO L131 PetriNetUnfolder]: For 1431984/1432351 co-relation queries the response was YES. [2023-08-30 16:26:54,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664906 conditions, 140943 events. 95870/140943 cut-off events. For 1431984/1432351 co-relation queries the response was YES. Maximal size of possible extension queue 6556. Compared 1191628 event pairs, 26881 based on Foata normal form. 1158/123882 useless extension candidates. Maximal degree in co-relation 651417. Up to 58217 conditions per place. [2023-08-30 16:26:54,670 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 665 selfloop transitions, 255 changer transitions 1/940 dead transitions. [2023-08-30 16:26:54,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 940 transitions, 18273 flow [2023-08-30 16:26:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:26:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:26:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 895 transitions. [2023-08-30 16:26:54,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439484126984127 [2023-08-30 16:26:54,673 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 895 transitions. [2023-08-30 16:26:54,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 895 transitions. [2023-08-30 16:26:54,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:54,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 895 transitions. [2023-08-30 16:26:54,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.85714285714286) internal successors, (895), 7 states have internal predecessors, (895), 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 16:26:54,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:26:54,688 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 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 16:26:54,688 INFO L175 Difference]: Start difference. First operand has 130 places, 499 transitions, 9268 flow. Second operand 7 states and 895 transitions. [2023-08-30 16:26:54,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 940 transitions, 18273 flow [2023-08-30 16:27:06,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 940 transitions, 18161 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-08-30 16:27:06,642 INFO L231 Difference]: Finished difference. Result has 142 places, 607 transitions, 12569 flow [2023-08-30 16:27:06,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12569, PETRI_PLACES=142, PETRI_TRANSITIONS=607} [2023-08-30 16:27:06,644 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 102 predicate places. [2023-08-30 16:27:06,644 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 607 transitions, 12569 flow [2023-08-30 16:27:06,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:27:06,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:06,645 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:27:06,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 16:27:06,645 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:06,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1844168615, now seen corresponding path program 1 times [2023-08-30 16:27:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:06,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443043635] [2023-08-30 16:27:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:06,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:27:06,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:06,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443043635] [2023-08-30 16:27:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443043635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:27:06,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:27:06,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:27:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447594282] [2023-08-30 16:27:06,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:27:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:27:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:27:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:27:06,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 288 [2023-08-30 16:27:06,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 607 transitions, 12569 flow. Second operand has 7 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 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 16:27:06,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:06,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 288 [2023-08-30 16:27:06,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:39,184 INFO L130 PetriNetUnfolder]: 129779/186535 cut-off events. [2023-08-30 16:27:39,185 INFO L131 PetriNetUnfolder]: For 2216687/2216687 co-relation queries the response was YES. [2023-08-30 16:27:41,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924706 conditions, 186535 events. 129779/186535 cut-off events. For 2216687/2216687 co-relation queries the response was YES. Maximal size of possible extension queue 7576. Compared 1555502 event pairs, 36212 based on Foata normal form. 1096/163402 useless extension candidates. Maximal degree in co-relation 895435. Up to 67429 conditions per place. [2023-08-30 16:27:41,585 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 674 selfloop transitions, 500 changer transitions 12/1189 dead transitions. [2023-08-30 16:27:41,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 1189 transitions, 23966 flow [2023-08-30 16:27:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:27:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:27:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1563 transitions. [2023-08-30 16:27:41,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41746794871794873 [2023-08-30 16:27:41,587 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1563 transitions. [2023-08-30 16:27:41,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1563 transitions. [2023-08-30 16:27:41,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:41,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1563 transitions. [2023-08-30 16:27:41,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.23076923076923) internal successors, (1563), 13 states have internal predecessors, (1563), 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 16:27:41,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 288.0) internal successors, (4032), 14 states have internal predecessors, (4032), 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 16:27:41,592 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 288.0) internal successors, (4032), 14 states have internal predecessors, (4032), 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 16:27:41,593 INFO L175 Difference]: Start difference. First operand has 142 places, 607 transitions, 12569 flow. Second operand 13 states and 1563 transitions. [2023-08-30 16:27:41,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 1189 transitions, 23966 flow [2023-08-30 16:28:03,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1189 transitions, 23633 flow, removed 145 selfloop flow, removed 1 redundant places. [2023-08-30 16:28:03,747 INFO L231 Difference]: Finished difference. Result has 164 places, 861 transitions, 19287 flow [2023-08-30 16:28:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19287, PETRI_PLACES=164, PETRI_TRANSITIONS=861} [2023-08-30 16:28:03,747 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2023-08-30 16:28:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 861 transitions, 19287 flow [2023-08-30 16:28:03,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 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 16:28:03,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:28:03,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:28:03,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 16:28:03,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:28:03,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:28:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1658596953, now seen corresponding path program 1 times [2023-08-30 16:28:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:28:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698165181] [2023-08-30 16:28:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:28:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:28:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:28:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:28:03,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:28:03,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698165181] [2023-08-30 16:28:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698165181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:28:03,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:28:03,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:28:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854836742] [2023-08-30 16:28:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:28:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:28:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:28:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:28:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:28:03,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 288 [2023-08-30 16:28:03,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 861 transitions, 19287 flow. Second operand has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:28:03,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:28:03,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 288 [2023-08-30 16:28:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand