./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/queue.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 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:57:19,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:57:19,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:57:19,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:57:19,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:57:19,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:57:19,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:57:19,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:57:19,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:57:19,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:57:19,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:57:19,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:57:19,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:57:19,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:57:19,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:57:19,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:57:19,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:57:19,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:57:19,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:57:19,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:57:19,879 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:57:19,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:57:19,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:57:19,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:57:19,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:57:19,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:57:19,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:57:19,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:57:19,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:57:19,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:57:19,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:57:19,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:57:19,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:57:19,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:57:19,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:57:19,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:57:19,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:57:19,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:57:19,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:57:19,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:57:19,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:57:19,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:57:19,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:57:19,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:57:19,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:57:19,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:57:19,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:57:19,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:57:19,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:57:19,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:57:19,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:57:19,933 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:57:19,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:57:19,934 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:57:19,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:57:19,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:57:19,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:57:19,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:57:19,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:57:19,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:57:19,935 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:57:19,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:57:19,936 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:57:19,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:57:19,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:57:19,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:57:19,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:57:19,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:57:19,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:57:19,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:57:19,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:57:19,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:57:19,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:57:19,938 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:57:19,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:57:19,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:57:19,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2022-07-19 20:57:20,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:57:20,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:57:20,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:57:20,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:57:20,190 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:57:20,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/queue.i [2022-07-19 20:57:20,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2404141ab/6d5c729193724206a6c1b59598daf27f/FLAGbacd2a507 [2022-07-19 20:57:20,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:57:20,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i [2022-07-19 20:57:20,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2404141ab/6d5c729193724206a6c1b59598daf27f/FLAGbacd2a507 [2022-07-19 20:57:21,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2404141ab/6d5c729193724206a6c1b59598daf27f [2022-07-19 20:57:21,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:57:21,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:57:21,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:57:21,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:57:21,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:57:21,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ca147b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21, skipping insertion in model container [2022-07-19 20:57:21,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:57:21,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:57:21,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i[43284,43297] [2022-07-19 20:57:21,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i[43491,43504] [2022-07-19 20:57:21,422 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i[43772,43785] [2022-07-19 20:57:21,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:57:21,437 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:57:21,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i[43284,43297] [2022-07-19 20:57:21,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i[43491,43504] [2022-07-19 20:57:21,504 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i[43772,43785] [2022-07-19 20:57:21,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:57:21,566 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:57:21,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21 WrapperNode [2022-07-19 20:57:21,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:57:21,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:57:21,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:57:21,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:57:21,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,646 INFO L137 Inliner]: procedures = 274, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 244 [2022-07-19 20:57:21,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:57:21,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:57:21,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:57:21,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:57:21,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:57:21,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:57:21,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:57:21,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:57:21,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (1/1) ... [2022-07-19 20:57:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:57:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:21,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 20:57:21,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 20:57:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-19 20:57:21,792 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-19 20:57:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-19 20:57:21,792 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-19 20:57:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 20:57:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 20:57:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 20:57:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 20:57:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 20:57:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:57:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:57:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:57:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:57:21,795 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 20:57:21,937 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:57:21,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:57:22,229 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:57:22,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:57:22,239 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 20:57:22,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:57:22 BoogieIcfgContainer [2022-07-19 20:57:22,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:57:22,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:57:22,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:57:22,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:57:22,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:57:21" (1/3) ... [2022-07-19 20:57:22,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5b24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:57:22, skipping insertion in model container [2022-07-19 20:57:22,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:21" (2/3) ... [2022-07-19 20:57:22,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5b24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:57:22, skipping insertion in model container [2022-07-19 20:57:22,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:57:22" (3/3) ... [2022-07-19 20:57:22,248 INFO L111 eAbstractionObserver]: Analyzing ICFG queue.i [2022-07-19 20:57:22,252 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 20:57:22,260 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:57:22,260 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-19 20:57:22,260 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 20:57:22,355 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 20:57:22,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 266 places, 274 transitions, 564 flow [2022-07-19 20:57:22,511 INFO L129 PetriNetUnfolder]: 15/272 cut-off events. [2022-07-19 20:57:22,515 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 20:57:22,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 272 events. 15/272 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 360 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-07-19 20:57:22,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 274 transitions, 564 flow [2022-07-19 20:57:22,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 262 transitions, 533 flow [2022-07-19 20:57:22,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:57:22,552 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d5ec32b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d707b55 [2022-07-19 20:57:22,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 20:57:22,563 INFO L129 PetriNetUnfolder]: 1/64 cut-off events. [2022-07-19 20:57:22,563 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:57:22,563 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:22,564 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:22,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1738925689, now seen corresponding path program 1 times [2022-07-19 20:57:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:22,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561300293] [2022-07-19 20:57:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561300293] [2022-07-19 20:57:22,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561300293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:22,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:22,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:57:22,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13984065] [2022-07-19 20:57:22,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:22,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:57:22,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:57:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:57:22,861 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 274 [2022-07-19 20:57:22,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 262 transitions, 533 flow. Second operand has 2 states, 2 states have (on average 261.5) internal successors, (523), 2 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:22,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:22,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 274 [2022-07-19 20:57:22,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:22,922 INFO L129 PetriNetUnfolder]: 10/251 cut-off events. [2022-07-19 20:57:22,922 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-07-19 20:57:22,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 251 events. 10/251 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 283 event pairs, 0 based on Foata normal form. 7/246 useless extension candidates. Maximal degree in co-relation 191. Up to 4 conditions per place. [2022-07-19 20:57:22,927 INFO L132 encePairwiseOnDemand]: 269/274 looper letters, 3 selfloop transitions, 0 changer transitions 0/251 dead transitions. [2022-07-19 20:57:22,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 251 transitions, 517 flow [2022-07-19 20:57:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:57:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:57:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 530 transitions. [2022-07-19 20:57:22,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9671532846715328 [2022-07-19 20:57:22,943 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 530 transitions. [2022-07-19 20:57:22,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 530 transitions. [2022-07-19 20:57:22,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:22,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 530 transitions. [2022-07-19 20:57:22,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 265.0) internal successors, (530), 2 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:22,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:22,957 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:22,958 INFO L186 Difference]: Start difference. First operand has 254 places, 262 transitions, 533 flow. Second operand 2 states and 530 transitions. [2022-07-19 20:57:22,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 251 transitions, 517 flow [2022-07-19 20:57:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 251 transitions, 512 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:57:22,971 INFO L242 Difference]: Finished difference. Result has 246 places, 251 transitions, 506 flow [2022-07-19 20:57:22,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=506, PETRI_PLACES=246, PETRI_TRANSITIONS=251} [2022-07-19 20:57:22,976 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, -8 predicate places. [2022-07-19 20:57:22,976 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 251 transitions, 506 flow [2022-07-19 20:57:22,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.5) internal successors, (523), 2 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:22,977 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:22,977 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:22,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:57:22,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1729238147, now seen corresponding path program 1 times [2022-07-19 20:57:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:22,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038583897] [2022-07-19 20:57:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:22,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:23,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038583897] [2022-07-19 20:57:23,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038583897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:23,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:23,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 20:57:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244202971] [2022-07-19 20:57:23,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 20:57:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 20:57:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 20:57:23,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 274 [2022-07-19 20:57:23,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 251 transitions, 506 flow. Second operand has 12 states, 12 states have (on average 199.75) internal successors, (2397), 12 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:23,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:23,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 274 [2022-07-19 20:57:23,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:24,422 INFO L129 PetriNetUnfolder]: 1003/4117 cut-off events. [2022-07-19 20:57:24,423 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-19 20:57:24,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5628 conditions, 4117 events. 1003/4117 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 33918 event pairs, 789 based on Foata normal form. 0/3832 useless extension candidates. Maximal degree in co-relation 5625. Up to 1435 conditions per place. [2022-07-19 20:57:24,452 INFO L132 encePairwiseOnDemand]: 261/274 looper letters, 52 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2022-07-19 20:57:24,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 247 transitions, 626 flow [2022-07-19 20:57:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 20:57:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 20:57:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2626 transitions. [2022-07-19 20:57:24,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7372262773722628 [2022-07-19 20:57:24,460 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2626 transitions. [2022-07-19 20:57:24,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2626 transitions. [2022-07-19 20:57:24,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:24,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2626 transitions. [2022-07-19 20:57:24,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 202.0) internal successors, (2626), 13 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,480 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,480 INFO L186 Difference]: Start difference. First operand has 246 places, 251 transitions, 506 flow. Second operand 13 states and 2626 transitions. [2022-07-19 20:57:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 247 transitions, 626 flow [2022-07-19 20:57:24,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 247 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:57:24,492 INFO L242 Difference]: Finished difference. Result has 255 places, 247 transitions, 522 flow [2022-07-19 20:57:24,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=522, PETRI_PLACES=255, PETRI_TRANSITIONS=247} [2022-07-19 20:57:24,494 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 1 predicate places. [2022-07-19 20:57:24,494 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 247 transitions, 522 flow [2022-07-19 20:57:24,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.75) internal successors, (2397), 12 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:24,496 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:24,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:57:24,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash -718598690, now seen corresponding path program 1 times [2022-07-19 20:57:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:24,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101467139] [2022-07-19 20:57:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101467139] [2022-07-19 20:57:24,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101467139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:24,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:24,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:57:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699611742] [2022-07-19 20:57:24,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:57:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:57:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:57:24,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 274 [2022-07-19 20:57:24,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 247 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:24,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 274 [2022-07-19 20:57:24,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:24,691 INFO L129 PetriNetUnfolder]: 26/432 cut-off events. [2022-07-19 20:57:24,691 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 20:57:24,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 432 events. 26/432 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1082 event pairs, 2 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 495. Up to 13 conditions per place. [2022-07-19 20:57:24,695 INFO L132 encePairwiseOnDemand]: 268/274 looper letters, 9 selfloop transitions, 5 changer transitions 0/247 dead transitions. [2022-07-19 20:57:24,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 247 transitions, 554 flow [2022-07-19 20:57:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:57:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:57:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1015 transitions. [2022-07-19 20:57:24,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.926094890510949 [2022-07-19 20:57:24,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1015 transitions. [2022-07-19 20:57:24,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1015 transitions. [2022-07-19 20:57:24,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:24,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1015 transitions. [2022-07-19 20:57:24,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,706 INFO L186 Difference]: Start difference. First operand has 255 places, 247 transitions, 522 flow. Second operand 4 states and 1015 transitions. [2022-07-19 20:57:24,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 247 transitions, 554 flow [2022-07-19 20:57:24,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 247 transitions, 531 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-07-19 20:57:24,711 INFO L242 Difference]: Finished difference. Result has 246 places, 245 transitions, 505 flow [2022-07-19 20:57:24,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=505, PETRI_PLACES=246, PETRI_TRANSITIONS=245} [2022-07-19 20:57:24,712 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, -8 predicate places. [2022-07-19 20:57:24,712 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 245 transitions, 505 flow [2022-07-19 20:57:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:24,713 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:57:24,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 262167032, now seen corresponding path program 1 times [2022-07-19 20:57:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752609375] [2022-07-19 20:57:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:24,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:24,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752609375] [2022-07-19 20:57:24,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752609375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:24,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:24,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:57:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031752683] [2022-07-19 20:57:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:57:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:57:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:57:24,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 274 [2022-07-19 20:57:24,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 245 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:24,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 274 [2022-07-19 20:57:24,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:24,868 INFO L129 PetriNetUnfolder]: 33/527 cut-off events. [2022-07-19 20:57:24,868 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-07-19 20:57:24,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 527 events. 33/527 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1265 event pairs, 2 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 582. Up to 23 conditions per place. [2022-07-19 20:57:24,895 INFO L132 encePairwiseOnDemand]: 270/274 looper letters, 10 selfloop transitions, 3 changer transitions 0/249 dead transitions. [2022-07-19 20:57:24,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 249 transitions, 542 flow [2022-07-19 20:57:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:57:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 20:57:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2022-07-19 20:57:24,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9476885644768857 [2022-07-19 20:57:24,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2022-07-19 20:57:24,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2022-07-19 20:57:24,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:24,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2022-07-19 20:57:24,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,904 INFO L186 Difference]: Start difference. First operand has 246 places, 245 transitions, 505 flow. Second operand 3 states and 779 transitions. [2022-07-19 20:57:24,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 249 transitions, 542 flow [2022-07-19 20:57:24,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 249 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:57:24,908 INFO L242 Difference]: Finished difference. Result has 246 places, 246 transitions, 510 flow [2022-07-19 20:57:24,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=510, PETRI_PLACES=246, PETRI_TRANSITIONS=246} [2022-07-19 20:57:24,909 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, -8 predicate places. [2022-07-19 20:57:24,910 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 246 transitions, 510 flow [2022-07-19 20:57:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:24,910 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:57:24,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash -63793281, now seen corresponding path program 1 times [2022-07-19 20:57:24,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187974516] [2022-07-19 20:57:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:24,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:24,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187974516] [2022-07-19 20:57:24,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187974516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:24,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:24,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:57:24,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689041856] [2022-07-19 20:57:24,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:57:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:57:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:57:24,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 274 [2022-07-19 20:57:24,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 246 transitions, 510 flow. Second operand has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:24,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:24,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 274 [2022-07-19 20:57:24,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:25,084 INFO L129 PetriNetUnfolder]: 51/836 cut-off events. [2022-07-19 20:57:25,084 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 20:57:25,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 836 events. 51/836 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3021 event pairs, 7 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 940. Up to 27 conditions per place. [2022-07-19 20:57:25,092 INFO L132 encePairwiseOnDemand]: 269/274 looper letters, 15 selfloop transitions, 5 changer transitions 0/254 dead transitions. [2022-07-19 20:57:25,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 254 transitions, 573 flow [2022-07-19 20:57:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:57:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 20:57:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1281 transitions. [2022-07-19 20:57:25,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.935036496350365 [2022-07-19 20:57:25,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1281 transitions. [2022-07-19 20:57:25,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1281 transitions. [2022-07-19 20:57:25,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:25,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1281 transitions. [2022-07-19 20:57:25,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:25,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:25,103 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:25,103 INFO L186 Difference]: Start difference. First operand has 246 places, 246 transitions, 510 flow. Second operand 5 states and 1281 transitions. [2022-07-19 20:57:25,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 254 transitions, 573 flow [2022-07-19 20:57:25,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 254 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 20:57:25,108 INFO L242 Difference]: Finished difference. Result has 252 places, 249 transitions, 537 flow [2022-07-19 20:57:25,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=252, PETRI_TRANSITIONS=249} [2022-07-19 20:57:25,109 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, -2 predicate places. [2022-07-19 20:57:25,109 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 249 transitions, 537 flow [2022-07-19 20:57:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:25,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:25,110 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:57:25,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -836569327, now seen corresponding path program 1 times [2022-07-19 20:57:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:25,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633286743] [2022-07-19 20:57:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:25,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633286743] [2022-07-19 20:57:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633286743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:25,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-19 20:57:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837801134] [2022-07-19 20:57:25,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 20:57:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 20:57:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:57:25,608 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 274 [2022-07-19 20:57:25,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 249 transitions, 537 flow. Second operand has 17 states, 17 states have (on average 187.41176470588235) internal successors, (3186), 17 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:25,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:25,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 274 [2022-07-19 20:57:25,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:27,168 INFO L129 PetriNetUnfolder]: 1599/6669 cut-off events. [2022-07-19 20:57:27,168 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-19 20:57:27,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 6669 events. 1599/6669 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 58356 event pairs, 1290 based on Foata normal form. 0/6318 useless extension candidates. Maximal degree in co-relation 9616. Up to 2556 conditions per place. [2022-07-19 20:57:27,214 INFO L132 encePairwiseOnDemand]: 258/274 looper letters, 79 selfloop transitions, 20 changer transitions 0/271 dead transitions. [2022-07-19 20:57:27,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 271 transitions, 781 flow [2022-07-19 20:57:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:57:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 20:57:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2876 transitions. [2022-07-19 20:57:27,221 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6997566909975669 [2022-07-19 20:57:27,221 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2876 transitions. [2022-07-19 20:57:27,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2876 transitions. [2022-07-19 20:57:27,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:27,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2876 transitions. [2022-07-19 20:57:27,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 191.73333333333332) internal successors, (2876), 15 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:27,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 274.0) internal successors, (4384), 16 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:27,236 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 274.0) internal successors, (4384), 16 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:27,237 INFO L186 Difference]: Start difference. First operand has 252 places, 249 transitions, 537 flow. Second operand 15 states and 2876 transitions. [2022-07-19 20:57:27,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 271 transitions, 781 flow [2022-07-19 20:57:27,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 271 transitions, 781 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:57:27,243 INFO L242 Difference]: Finished difference. Result has 272 places, 262 transitions, 644 flow [2022-07-19 20:57:27,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=644, PETRI_PLACES=272, PETRI_TRANSITIONS=262} [2022-07-19 20:57:27,244 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 18 predicate places. [2022-07-19 20:57:27,244 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 262 transitions, 644 flow [2022-07-19 20:57:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.41176470588235) internal successors, (3186), 17 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:27,246 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:27,246 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:27,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 20:57:27,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1663669004, now seen corresponding path program 1 times [2022-07-19 20:57:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:27,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261048682] [2022-07-19 20:57:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261048682] [2022-07-19 20:57:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261048682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:28,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:28,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-19 20:57:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861650080] [2022-07-19 20:57:28,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:28,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 20:57:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 20:57:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-07-19 20:57:28,372 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 274 [2022-07-19 20:57:28,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 262 transitions, 644 flow. Second operand has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:28,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:28,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 274 [2022-07-19 20:57:28,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:31,511 INFO L129 PetriNetUnfolder]: 1457/6029 cut-off events. [2022-07-19 20:57:31,511 INFO L130 PetriNetUnfolder]: For 117/120 co-relation queries the response was YES. [2022-07-19 20:57:31,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8866 conditions, 6029 events. 1457/6029 cut-off events. For 117/120 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 51353 event pairs, 1160 based on Foata normal form. 2/5754 useless extension candidates. Maximal degree in co-relation 8852. Up to 2311 conditions per place. [2022-07-19 20:57:31,565 INFO L132 encePairwiseOnDemand]: 244/274 looper letters, 89 selfloop transitions, 43 changer transitions 0/296 dead transitions. [2022-07-19 20:57:31,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 296 transitions, 998 flow [2022-07-19 20:57:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 20:57:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 20:57:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4605 transitions. [2022-07-19 20:57:31,577 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6464065131948343 [2022-07-19 20:57:31,577 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4605 transitions. [2022-07-19 20:57:31,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4605 transitions. [2022-07-19 20:57:31,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:31,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4605 transitions. [2022-07-19 20:57:31,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 177.1153846153846) internal successors, (4605), 26 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:31,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 274.0) internal successors, (7398), 27 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:31,616 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 274.0) internal successors, (7398), 27 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:31,616 INFO L186 Difference]: Start difference. First operand has 272 places, 262 transitions, 644 flow. Second operand 26 states and 4605 transitions. [2022-07-19 20:57:31,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 296 transitions, 998 flow [2022-07-19 20:57:31,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 296 transitions, 985 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-07-19 20:57:31,631 INFO L242 Difference]: Finished difference. Result has 301 places, 282 transitions, 854 flow [2022-07-19 20:57:31,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=854, PETRI_PLACES=301, PETRI_TRANSITIONS=282} [2022-07-19 20:57:31,632 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 47 predicate places. [2022-07-19 20:57:31,632 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 282 transitions, 854 flow [2022-07-19 20:57:31,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:31,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:31,634 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:31,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 20:57:31,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -166761329, now seen corresponding path program 1 times [2022-07-19 20:57:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:31,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510962847] [2022-07-19 20:57:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:31,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510962847] [2022-07-19 20:57:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510962847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:32,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:32,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 20:57:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424712624] [2022-07-19 20:57:32,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:32,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 20:57:32,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 20:57:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-19 20:57:32,314 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 274 [2022-07-19 20:57:32,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 282 transitions, 854 flow. Second operand has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:32,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:32,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 274 [2022-07-19 20:57:32,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:33,992 INFO L129 PetriNetUnfolder]: 1619/6777 cut-off events. [2022-07-19 20:57:33,992 INFO L130 PetriNetUnfolder]: For 394/398 co-relation queries the response was YES. [2022-07-19 20:57:34,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10234 conditions, 6777 events. 1619/6777 cut-off events. For 394/398 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 59246 event pairs, 734 based on Foata normal form. 3/6433 useless extension candidates. Maximal degree in co-relation 10209. Up to 2470 conditions per place. [2022-07-19 20:57:34,049 INFO L132 encePairwiseOnDemand]: 253/274 looper letters, 115 selfloop transitions, 34 changer transitions 0/318 dead transitions. [2022-07-19 20:57:34,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 318 transitions, 1264 flow [2022-07-19 20:57:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 20:57:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 20:57:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2913 transitions. [2022-07-19 20:57:34,059 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6644616788321168 [2022-07-19 20:57:34,059 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2913 transitions. [2022-07-19 20:57:34,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2913 transitions. [2022-07-19 20:57:34,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:34,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2913 transitions. [2022-07-19 20:57:34,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 182.0625) internal successors, (2913), 16 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:34,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 274.0) internal successors, (4658), 17 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:34,074 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 274.0) internal successors, (4658), 17 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:34,074 INFO L186 Difference]: Start difference. First operand has 301 places, 282 transitions, 854 flow. Second operand 16 states and 2913 transitions. [2022-07-19 20:57:34,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 318 transitions, 1264 flow [2022-07-19 20:57:34,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 318 transitions, 1223 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-07-19 20:57:34,085 INFO L242 Difference]: Finished difference. Result has 309 places, 292 transitions, 980 flow [2022-07-19 20:57:34,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=980, PETRI_PLACES=309, PETRI_TRANSITIONS=292} [2022-07-19 20:57:34,088 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 55 predicate places. [2022-07-19 20:57:34,088 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 292 transitions, 980 flow [2022-07-19 20:57:34,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:34,089 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:34,089 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:34,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 20:57:34,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1319266727, now seen corresponding path program 2 times [2022-07-19 20:57:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:34,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781246186] [2022-07-19 20:57:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:34,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781246186] [2022-07-19 20:57:34,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781246186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:34,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:34,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 20:57:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85890345] [2022-07-19 20:57:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 20:57:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 20:57:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-19 20:57:34,711 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 274 [2022-07-19 20:57:34,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 292 transitions, 980 flow. Second operand has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:34,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:34,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 274 [2022-07-19 20:57:34,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:36,696 INFO L129 PetriNetUnfolder]: 1640/6855 cut-off events. [2022-07-19 20:57:36,697 INFO L130 PetriNetUnfolder]: For 650/654 co-relation queries the response was YES. [2022-07-19 20:57:36,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10573 conditions, 6855 events. 1640/6855 cut-off events. For 650/654 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 59957 event pairs, 735 based on Foata normal form. 3/6511 useless extension candidates. Maximal degree in co-relation 10543. Up to 2475 conditions per place. [2022-07-19 20:57:36,750 INFO L132 encePairwiseOnDemand]: 254/274 looper letters, 116 selfloop transitions, 38 changer transitions 0/323 dead transitions. [2022-07-19 20:57:36,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 323 transitions, 1409 flow [2022-07-19 20:57:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:57:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 20:57:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2737 transitions. [2022-07-19 20:57:36,756 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6659367396593674 [2022-07-19 20:57:36,757 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2737 transitions. [2022-07-19 20:57:36,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2737 transitions. [2022-07-19 20:57:36,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:36,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2737 transitions. [2022-07-19 20:57:36,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.46666666666667) internal successors, (2737), 15 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:36,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 274.0) internal successors, (4384), 16 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:36,770 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 274.0) internal successors, (4384), 16 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:36,770 INFO L186 Difference]: Start difference. First operand has 309 places, 292 transitions, 980 flow. Second operand 15 states and 2737 transitions. [2022-07-19 20:57:36,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 323 transitions, 1409 flow [2022-07-19 20:57:36,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 323 transitions, 1377 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-07-19 20:57:36,781 INFO L242 Difference]: Finished difference. Result has 317 places, 298 transitions, 1126 flow [2022-07-19 20:57:36,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1126, PETRI_PLACES=317, PETRI_TRANSITIONS=298} [2022-07-19 20:57:36,782 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 63 predicate places. [2022-07-19 20:57:36,782 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 298 transitions, 1126 flow [2022-07-19 20:57:36,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:36,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:36,783 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:36,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 20:57:36,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1981120671, now seen corresponding path program 3 times [2022-07-19 20:57:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:36,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45996133] [2022-07-19 20:57:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:37,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45996133] [2022-07-19 20:57:37,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45996133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:37,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:37,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 20:57:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061273140] [2022-07-19 20:57:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 20:57:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 20:57:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-07-19 20:57:37,297 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 274 [2022-07-19 20:57:37,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 298 transitions, 1126 flow. Second operand has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:37,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:37,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 274 [2022-07-19 20:57:37,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:38,762 INFO L129 PetriNetUnfolder]: 1625/6840 cut-off events. [2022-07-19 20:57:38,762 INFO L130 PetriNetUnfolder]: For 1089/1093 co-relation queries the response was YES. [2022-07-19 20:57:38,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10638 conditions, 6840 events. 1625/6840 cut-off events. For 1089/1093 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 60054 event pairs, 741 based on Foata normal form. 6/6497 useless extension candidates. Maximal degree in co-relation 10605. Up to 2414 conditions per place. [2022-07-19 20:57:38,823 INFO L132 encePairwiseOnDemand]: 257/274 looper letters, 99 selfloop transitions, 36 changer transitions 0/304 dead transitions. [2022-07-19 20:57:38,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 304 transitions, 1404 flow [2022-07-19 20:57:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:57:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 20:57:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2535 transitions. [2022-07-19 20:57:38,828 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6608446298227321 [2022-07-19 20:57:38,828 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2535 transitions. [2022-07-19 20:57:38,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2535 transitions. [2022-07-19 20:57:38,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:38,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2535 transitions. [2022-07-19 20:57:38,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 181.07142857142858) internal successors, (2535), 14 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:38,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 274.0) internal successors, (4110), 15 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:38,839 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 274.0) internal successors, (4110), 15 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:38,839 INFO L186 Difference]: Start difference. First operand has 317 places, 298 transitions, 1126 flow. Second operand 14 states and 2535 transitions. [2022-07-19 20:57:38,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 304 transitions, 1404 flow [2022-07-19 20:57:38,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 304 transitions, 1368 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-07-19 20:57:38,850 INFO L242 Difference]: Finished difference. Result has 317 places, 294 transitions, 1140 flow [2022-07-19 20:57:38,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1140, PETRI_PLACES=317, PETRI_TRANSITIONS=294} [2022-07-19 20:57:38,851 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 63 predicate places. [2022-07-19 20:57:38,852 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 294 transitions, 1140 flow [2022-07-19 20:57:38,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 176.83333333333334) internal successors, (3183), 18 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:38,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:38,853 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:38,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 20:57:38,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash 750983562, now seen corresponding path program 1 times [2022-07-19 20:57:38,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:38,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309976505] [2022-07-19 20:57:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:38,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:40,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309976505] [2022-07-19 20:57:40,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309976505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:40,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:40,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-19 20:57:40,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106533585] [2022-07-19 20:57:40,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:40,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 20:57:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 20:57:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-19 20:57:40,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 274 [2022-07-19 20:57:40,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 294 transitions, 1140 flow. Second operand has 29 states, 29 states have (on average 163.13793103448276) internal successors, (4731), 29 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:40,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:40,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 274 [2022-07-19 20:57:40,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:43,143 INFO L129 PetriNetUnfolder]: 847/3524 cut-off events. [2022-07-19 20:57:43,143 INFO L130 PetriNetUnfolder]: For 1153/1156 co-relation queries the response was YES. [2022-07-19 20:57:43,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5930 conditions, 3524 events. 847/3524 cut-off events. For 1153/1156 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 24817 event pairs, 336 based on Foata normal form. 3/3355 useless extension candidates. Maximal degree in co-relation 5898. Up to 1081 conditions per place. [2022-07-19 20:57:43,165 INFO L132 encePairwiseOnDemand]: 245/274 looper letters, 121 selfloop transitions, 51 changer transitions 0/319 dead transitions. [2022-07-19 20:57:43,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 319 transitions, 1555 flow [2022-07-19 20:57:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 20:57:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 20:57:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4489 transitions. [2022-07-19 20:57:43,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6067856177345229 [2022-07-19 20:57:43,172 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4489 transitions. [2022-07-19 20:57:43,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4489 transitions. [2022-07-19 20:57:43,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:43,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4489 transitions. [2022-07-19 20:57:43,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 166.25925925925927) internal successors, (4489), 27 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 274.0) internal successors, (7672), 28 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,189 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 274.0) internal successors, (7672), 28 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,190 INFO L186 Difference]: Start difference. First operand has 317 places, 294 transitions, 1140 flow. Second operand 27 states and 4489 transitions. [2022-07-19 20:57:43,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 319 transitions, 1555 flow [2022-07-19 20:57:43,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 319 transitions, 1463 flow, removed 1 selfloop flow, removed 21 redundant places. [2022-07-19 20:57:43,200 INFO L242 Difference]: Finished difference. Result has 316 places, 285 transitions, 1134 flow [2022-07-19 20:57:43,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1134, PETRI_PLACES=316, PETRI_TRANSITIONS=285} [2022-07-19 20:57:43,201 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 62 predicate places. [2022-07-19 20:57:43,201 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 285 transitions, 1134 flow [2022-07-19 20:57:43,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 163.13793103448276) internal successors, (4731), 29 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:43,203 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:43,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:57:43,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash -651310313, now seen corresponding path program 1 times [2022-07-19 20:57:43,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:43,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238031914] [2022-07-19 20:57:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:43,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238031914] [2022-07-19 20:57:43,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238031914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:43,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:43,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:57:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864934441] [2022-07-19 20:57:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:43,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:57:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:57:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:57:43,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 274 [2022-07-19 20:57:43,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 285 transitions, 1134 flow. Second operand has 3 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:43,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 274 [2022-07-19 20:57:43,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:43,375 INFO L129 PetriNetUnfolder]: 61/910 cut-off events. [2022-07-19 20:57:43,376 INFO L130 PetriNetUnfolder]: For 529/530 co-relation queries the response was YES. [2022-07-19 20:57:43,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 910 events. 61/910 cut-off events. For 529/530 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3735 event pairs, 7 based on Foata normal form. 18/883 useless extension candidates. Maximal degree in co-relation 1444. Up to 39 conditions per place. [2022-07-19 20:57:43,382 INFO L132 encePairwiseOnDemand]: 268/274 looper letters, 12 selfloop transitions, 6 changer transitions 0/287 dead transitions. [2022-07-19 20:57:43,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 287 transitions, 1177 flow [2022-07-19 20:57:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:57:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 20:57:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2022-07-19 20:57:43,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9306569343065694 [2022-07-19 20:57:43,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2022-07-19 20:57:43,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2022-07-19 20:57:43,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:43,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2022-07-19 20:57:43,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,387 INFO L186 Difference]: Start difference. First operand has 316 places, 285 transitions, 1134 flow. Second operand 3 states and 765 transitions. [2022-07-19 20:57:43,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 287 transitions, 1177 flow [2022-07-19 20:57:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 287 transitions, 1087 flow, removed 0 selfloop flow, removed 23 redundant places. [2022-07-19 20:57:43,395 INFO L242 Difference]: Finished difference. Result has 295 places, 285 transitions, 1056 flow [2022-07-19 20:57:43,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1056, PETRI_PLACES=295, PETRI_TRANSITIONS=285} [2022-07-19 20:57:43,396 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 41 predicate places. [2022-07-19 20:57:43,397 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 285 transitions, 1056 flow [2022-07-19 20:57:43,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:43,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:43,397 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:43,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:57:43,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash 380125886, now seen corresponding path program 1 times [2022-07-19 20:57:43,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:43,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958398339] [2022-07-19 20:57:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:44,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958398339] [2022-07-19 20:57:44,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958398339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:44,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:44,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-07-19 20:57:44,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650566667] [2022-07-19 20:57:44,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:44,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 20:57:44,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 20:57:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-07-19 20:57:44,414 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 274 [2022-07-19 20:57:44,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 285 transitions, 1056 flow. Second operand has 30 states, 30 states have (on average 167.66666666666666) internal successors, (5030), 30 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:44,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:44,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 274 [2022-07-19 20:57:44,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:47,243 INFO L129 PetriNetUnfolder]: 533/2476 cut-off events. [2022-07-19 20:57:47,243 INFO L130 PetriNetUnfolder]: For 1098/1102 co-relation queries the response was YES. [2022-07-19 20:57:47,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4907 conditions, 2476 events. 533/2476 cut-off events. For 1098/1102 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 15420 event pairs, 69 based on Foata normal form. 0/2376 useless extension candidates. Maximal degree in co-relation 4878. Up to 433 conditions per place. [2022-07-19 20:57:47,260 INFO L132 encePairwiseOnDemand]: 239/274 looper letters, 160 selfloop transitions, 73 changer transitions 0/378 dead transitions. [2022-07-19 20:57:47,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 378 transitions, 1798 flow [2022-07-19 20:57:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 20:57:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-19 20:57:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5477 transitions. [2022-07-19 20:57:47,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6246578467153284 [2022-07-19 20:57:47,268 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5477 transitions. [2022-07-19 20:57:47,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5477 transitions. [2022-07-19 20:57:47,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:47,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5477 transitions. [2022-07-19 20:57:47,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 171.15625) internal successors, (5477), 32 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:47,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 274.0) internal successors, (9042), 33 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:47,289 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 274.0) internal successors, (9042), 33 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:47,289 INFO L186 Difference]: Start difference. First operand has 295 places, 285 transitions, 1056 flow. Second operand 32 states and 5477 transitions. [2022-07-19 20:57:47,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 378 transitions, 1798 flow [2022-07-19 20:57:47,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 378 transitions, 1792 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 20:57:47,301 INFO L242 Difference]: Finished difference. Result has 332 places, 308 transitions, 1350 flow [2022-07-19 20:57:47,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1350, PETRI_PLACES=332, PETRI_TRANSITIONS=308} [2022-07-19 20:57:47,303 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 78 predicate places. [2022-07-19 20:57:47,303 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 308 transitions, 1350 flow [2022-07-19 20:57:47,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 167.66666666666666) internal successors, (5030), 30 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:47,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:47,305 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:47,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:57:47,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1707383024, now seen corresponding path program 2 times [2022-07-19 20:57:47,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:47,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134329276] [2022-07-19 20:57:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:47,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:49,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134329276] [2022-07-19 20:57:49,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134329276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:49,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:49,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-07-19 20:57:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187507355] [2022-07-19 20:57:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:49,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 20:57:49,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 20:57:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 20:57:49,220 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 274 [2022-07-19 20:57:49,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 308 transitions, 1350 flow. Second operand has 39 states, 39 states have (on average 155.23076923076923) internal successors, (6054), 39 states have internal predecessors, (6054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:49,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:49,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 274 [2022-07-19 20:57:49,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:54,323 INFO L129 PetriNetUnfolder]: 672/3028 cut-off events. [2022-07-19 20:57:54,323 INFO L130 PetriNetUnfolder]: For 1956/1967 co-relation queries the response was YES. [2022-07-19 20:57:54,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6453 conditions, 3028 events. 672/3028 cut-off events. For 1956/1967 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 20583 event pairs, 71 based on Foata normal form. 0/2914 useless extension candidates. Maximal degree in co-relation 6416. Up to 419 conditions per place. [2022-07-19 20:57:54,343 INFO L132 encePairwiseOnDemand]: 228/274 looper letters, 181 selfloop transitions, 94 changer transitions 0/411 dead transitions. [2022-07-19 20:57:54,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 411 transitions, 2218 flow [2022-07-19 20:57:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 20:57:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 20:57:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7109 transitions. [2022-07-19 20:57:54,355 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5765612327656123 [2022-07-19 20:57:54,356 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7109 transitions. [2022-07-19 20:57:54,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7109 transitions. [2022-07-19 20:57:54,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:54,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7109 transitions. [2022-07-19 20:57:54,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 157.9777777777778) internal successors, (7109), 45 states have internal predecessors, (7109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:54,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:54,382 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 274.0) internal successors, (12604), 46 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:54,383 INFO L186 Difference]: Start difference. First operand has 332 places, 308 transitions, 1350 flow. Second operand 45 states and 7109 transitions. [2022-07-19 20:57:54,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 411 transitions, 2218 flow [2022-07-19 20:57:54,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 411 transitions, 2109 flow, removed 8 selfloop flow, removed 19 redundant places. [2022-07-19 20:57:54,399 INFO L242 Difference]: Finished difference. Result has 366 places, 330 transitions, 1595 flow [2022-07-19 20:57:54,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1595, PETRI_PLACES=366, PETRI_TRANSITIONS=330} [2022-07-19 20:57:54,400 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 112 predicate places. [2022-07-19 20:57:54,401 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 330 transitions, 1595 flow [2022-07-19 20:57:54,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 155.23076923076923) internal successors, (6054), 39 states have internal predecessors, (6054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:54,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:54,402 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:54,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:57:54,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:57:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash -743729229, now seen corresponding path program 1 times [2022-07-19 20:57:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:54,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646358467] [2022-07-19 20:57:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:57:56,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646358467] [2022-07-19 20:57:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646358467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:56,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:56,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-07-19 20:57:56,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705562317] [2022-07-19 20:57:56,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:56,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 20:57:56,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 20:57:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 20:57:56,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 274 [2022-07-19 20:57:56,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 330 transitions, 1595 flow. Second operand has 34 states, 34 states have (on average 162.58823529411765) internal successors, (5528), 34 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:57:56,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:56,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 274 [2022-07-19 20:57:56,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:58:00,688 INFO L129 PetriNetUnfolder]: 670/3350 cut-off events. [2022-07-19 20:58:00,689 INFO L130 PetriNetUnfolder]: For 2722/2730 co-relation queries the response was YES. [2022-07-19 20:58:00,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7260 conditions, 3350 events. 670/3350 cut-off events. For 2722/2730 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 23674 event pairs, 71 based on Foata normal form. 5/3235 useless extension candidates. Maximal degree in co-relation 7214. Up to 352 conditions per place. [2022-07-19 20:58:00,715 INFO L132 encePairwiseOnDemand]: 235/274 looper letters, 206 selfloop transitions, 80 changer transitions 0/435 dead transitions. [2022-07-19 20:58:00,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 435 transitions, 2476 flow [2022-07-19 20:58:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 20:58:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-19 20:58:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6634 transitions. [2022-07-19 20:58:00,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6052919708029197 [2022-07-19 20:58:00,731 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6634 transitions. [2022-07-19 20:58:00,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6634 transitions. [2022-07-19 20:58:00,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:58:00,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6634 transitions. [2022-07-19 20:58:00,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 165.85) internal successors, (6634), 40 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:00,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 274.0) internal successors, (11234), 41 states have internal predecessors, (11234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:00,751 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 274.0) internal successors, (11234), 41 states have internal predecessors, (11234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:00,751 INFO L186 Difference]: Start difference. First operand has 366 places, 330 transitions, 1595 flow. Second operand 40 states and 6634 transitions. [2022-07-19 20:58:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 435 transitions, 2476 flow [2022-07-19 20:58:00,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 435 transitions, 2329 flow, removed 12 selfloop flow, removed 28 redundant places. [2022-07-19 20:58:00,773 INFO L242 Difference]: Finished difference. Result has 382 places, 341 transitions, 1689 flow [2022-07-19 20:58:00,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1689, PETRI_PLACES=382, PETRI_TRANSITIONS=341} [2022-07-19 20:58:00,775 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 128 predicate places. [2022-07-19 20:58:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 341 transitions, 1689 flow [2022-07-19 20:58:00,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 162.58823529411765) internal successors, (5528), 34 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:00,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:58:00,776 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:58:00,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 20:58:00,777 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:58:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:58:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -445438229, now seen corresponding path program 1 times [2022-07-19 20:58:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:58:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226318742] [2022-07-19 20:58:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:58:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:58:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:58:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:58:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:58:01,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226318742] [2022-07-19 20:58:01,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226318742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:58:01,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:58:01,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-07-19 20:58:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141830380] [2022-07-19 20:58:01,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:58:01,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 20:58:01,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:58:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 20:58:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-07-19 20:58:01,634 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 274 [2022-07-19 20:58:01,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 341 transitions, 1689 flow. Second operand has 30 states, 30 states have (on average 175.43333333333334) internal successors, (5263), 30 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:01,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:58:01,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 274 [2022-07-19 20:58:01,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:58:03,754 INFO L129 PetriNetUnfolder]: 499/2400 cut-off events. [2022-07-19 20:58:03,754 INFO L130 PetriNetUnfolder]: For 2351/2358 co-relation queries the response was YES. [2022-07-19 20:58:03,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 2400 events. 499/2400 cut-off events. For 2351/2358 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 14368 event pairs, 71 based on Foata normal form. 6/2326 useless extension candidates. Maximal degree in co-relation 5508. Up to 477 conditions per place. [2022-07-19 20:58:03,774 INFO L132 encePairwiseOnDemand]: 243/274 looper letters, 139 selfloop transitions, 68 changer transitions 0/363 dead transitions. [2022-07-19 20:58:03,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 363 transitions, 2075 flow [2022-07-19 20:58:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 20:58:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 20:58:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4823 transitions. [2022-07-19 20:58:03,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6519329548526629 [2022-07-19 20:58:03,779 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4823 transitions. [2022-07-19 20:58:03,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4823 transitions. [2022-07-19 20:58:03,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:58:03,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4823 transitions. [2022-07-19 20:58:03,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 178.62962962962962) internal successors, (4823), 27 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:03,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 274.0) internal successors, (7672), 28 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:03,792 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 274.0) internal successors, (7672), 28 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:03,792 INFO L186 Difference]: Start difference. First operand has 382 places, 341 transitions, 1689 flow. Second operand 27 states and 4823 transitions. [2022-07-19 20:58:03,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 363 transitions, 2075 flow [2022-07-19 20:58:03,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 363 transitions, 1915 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-19 20:58:03,812 INFO L242 Difference]: Finished difference. Result has 360 places, 322 transitions, 1518 flow [2022-07-19 20:58:03,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1518, PETRI_PLACES=360, PETRI_TRANSITIONS=322} [2022-07-19 20:58:03,813 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 106 predicate places. [2022-07-19 20:58:03,813 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 322 transitions, 1518 flow [2022-07-19 20:58:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 175.43333333333334) internal successors, (5263), 30 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:03,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:58:03,814 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:58:03,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 20:58:03,814 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:58:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:58:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -346580370, now seen corresponding path program 1 times [2022-07-19 20:58:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:58:03,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114444972] [2022-07-19 20:58:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:58:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:58:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:58:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:58:06,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:58:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114444972] [2022-07-19 20:58:06,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114444972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:58:06,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:58:06,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-07-19 20:58:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659201190] [2022-07-19 20:58:06,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:58:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 20:58:06,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:58:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 20:58:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2083, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 20:58:06,581 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 274 [2022-07-19 20:58:06,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 322 transitions, 1518 flow. Second operand has 48 states, 48 states have (on average 130.3125) internal successors, (6255), 48 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:06,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:58:06,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 274 [2022-07-19 20:58:06,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:58:20,586 INFO L129 PetriNetUnfolder]: 6035/14723 cut-off events. [2022-07-19 20:58:20,586 INFO L130 PetriNetUnfolder]: For 9633/9636 co-relation queries the response was YES. [2022-07-19 20:58:20,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33041 conditions, 14723 events. 6035/14723 cut-off events. For 9633/9636 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 116951 event pairs, 1245 based on Foata normal form. 2/13709 useless extension candidates. Maximal degree in co-relation 32997. Up to 4855 conditions per place. [2022-07-19 20:58:20,681 INFO L132 encePairwiseOnDemand]: 216/274 looper letters, 574 selfloop transitions, 187 changer transitions 58/937 dead transitions. [2022-07-19 20:58:20,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 937 transitions, 5015 flow [2022-07-19 20:58:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-19 20:58:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-19 20:58:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 10746 transitions. [2022-07-19 20:58:20,692 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5028074115665356 [2022-07-19 20:58:20,692 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 10746 transitions. [2022-07-19 20:58:20,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 10746 transitions. [2022-07-19 20:58:20,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:58:20,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 10746 transitions. [2022-07-19 20:58:20,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 137.76923076923077) internal successors, (10746), 78 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:20,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 274.0) internal successors, (21646), 79 states have internal predecessors, (21646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:20,728 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 274.0) internal successors, (21646), 79 states have internal predecessors, (21646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:20,728 INFO L186 Difference]: Start difference. First operand has 360 places, 322 transitions, 1518 flow. Second operand 78 states and 10746 transitions. [2022-07-19 20:58:20,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 937 transitions, 5015 flow [2022-07-19 20:58:20,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 937 transitions, 4823 flow, removed 0 selfloop flow, removed 26 redundant places. [2022-07-19 20:58:20,792 INFO L242 Difference]: Finished difference. Result has 468 places, 457 transitions, 2858 flow [2022-07-19 20:58:20,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2858, PETRI_PLACES=468, PETRI_TRANSITIONS=457} [2022-07-19 20:58:20,793 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 214 predicate places. [2022-07-19 20:58:20,793 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 457 transitions, 2858 flow [2022-07-19 20:58:20,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 130.3125) internal successors, (6255), 48 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:20,794 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:58:20,794 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:58:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 20:58:20,795 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:58:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:58:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1163127472, now seen corresponding path program 2 times [2022-07-19 20:58:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:58:20,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194987123] [2022-07-19 20:58:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:58:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:58:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:58:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:58:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:58:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194987123] [2022-07-19 20:58:23,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194987123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:58:23,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:58:23,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-07-19 20:58:23,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138359508] [2022-07-19 20:58:23,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:58:23,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 20:58:23,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:58:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 20:58:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1813, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 20:58:23,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 274 [2022-07-19 20:58:23,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 457 transitions, 2858 flow. Second operand has 45 states, 45 states have (on average 136.4) internal successors, (6138), 45 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:23,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:58:23,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 274 [2022-07-19 20:58:23,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:58:36,861 INFO L129 PetriNetUnfolder]: 7447/17898 cut-off events. [2022-07-19 20:58:36,861 INFO L130 PetriNetUnfolder]: For 139566/139652 co-relation queries the response was YES. [2022-07-19 20:58:37,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63108 conditions, 17898 events. 7447/17898 cut-off events. For 139566/139652 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 146602 event pairs, 2909 based on Foata normal form. 179/17701 useless extension candidates. Maximal degree in co-relation 63007. Up to 10167 conditions per place. [2022-07-19 20:58:37,084 INFO L132 encePairwiseOnDemand]: 221/274 looper letters, 546 selfloop transitions, 123 changer transitions 38/832 dead transitions. [2022-07-19 20:58:37,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 832 transitions, 6813 flow [2022-07-19 20:58:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 20:58:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-19 20:58:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 9226 transitions. [2022-07-19 20:58:37,092 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5180235822571589 [2022-07-19 20:58:37,092 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 9226 transitions. [2022-07-19 20:58:37,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 9226 transitions. [2022-07-19 20:58:37,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:58:37,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 9226 transitions. [2022-07-19 20:58:37,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 141.93846153846152) internal successors, (9226), 65 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:37,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 274.0) internal successors, (18084), 66 states have internal predecessors, (18084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:37,120 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 274.0) internal successors, (18084), 66 states have internal predecessors, (18084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:37,120 INFO L186 Difference]: Start difference. First operand has 468 places, 457 transitions, 2858 flow. Second operand 65 states and 9226 transitions. [2022-07-19 20:58:37,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 832 transitions, 6813 flow [2022-07-19 20:58:37,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 832 transitions, 6714 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-07-19 20:58:37,538 INFO L242 Difference]: Finished difference. Result has 550 places, 561 transitions, 4713 flow [2022-07-19 20:58:37,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=4713, PETRI_PLACES=550, PETRI_TRANSITIONS=561} [2022-07-19 20:58:37,539 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 296 predicate places. [2022-07-19 20:58:37,539 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 561 transitions, 4713 flow [2022-07-19 20:58:37,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 136.4) internal successors, (6138), 45 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:37,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:58:37,540 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:58:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:58:37,541 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:58:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:58:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash 564604696, now seen corresponding path program 3 times [2022-07-19 20:58:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:58:37,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773473742] [2022-07-19 20:58:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:58:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:58:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:58:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:58:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:58:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773473742] [2022-07-19 20:58:40,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773473742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:58:40,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:58:40,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-07-19 20:58:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194695037] [2022-07-19 20:58:40,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:58:40,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 20:58:40,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:58:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 20:58:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 20:58:40,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 274 [2022-07-19 20:58:40,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 561 transitions, 4713 flow. Second operand has 48 states, 48 states have (on average 130.3125) internal successors, (6255), 48 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:40,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:58:40,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 274 [2022-07-19 20:58:40,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:58:57,688 INFO L129 PetriNetUnfolder]: 8692/20597 cut-off events. [2022-07-19 20:58:57,688 INFO L130 PetriNetUnfolder]: For 633428/633534 co-relation queries the response was YES. [2022-07-19 20:58:58,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91575 conditions, 20597 events. 8692/20597 cut-off events. For 633428/633534 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 173222 event pairs, 2177 based on Foata normal form. 177/20330 useless extension candidates. Maximal degree in co-relation 91442. Up to 11219 conditions per place. [2022-07-19 20:58:58,078 INFO L132 encePairwiseOnDemand]: 218/274 looper letters, 632 selfloop transitions, 142 changer transitions 39/931 dead transitions. [2022-07-19 20:58:58,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 931 transitions, 9323 flow [2022-07-19 20:58:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 20:58:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-19 20:58:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 9212 transitions. [2022-07-19 20:58:58,086 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4944182052382997 [2022-07-19 20:58:58,086 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 9212 transitions. [2022-07-19 20:58:58,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 9212 transitions. [2022-07-19 20:58:58,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:58:58,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 9212 transitions. [2022-07-19 20:58:58,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 135.47058823529412) internal successors, (9212), 68 states have internal predecessors, (9212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:58,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 274.0) internal successors, (18906), 69 states have internal predecessors, (18906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:58,257 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 274.0) internal successors, (18906), 69 states have internal predecessors, (18906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:58,257 INFO L186 Difference]: Start difference. First operand has 550 places, 561 transitions, 4713 flow. Second operand 68 states and 9212 transitions. [2022-07-19 20:58:58,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 931 transitions, 9323 flow [2022-07-19 20:58:59,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 931 transitions, 8398 flow, removed 448 selfloop flow, removed 12 redundant places. [2022-07-19 20:58:59,664 INFO L242 Difference]: Finished difference. Result has 637 places, 659 transitions, 5759 flow [2022-07-19 20:58:59,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=5759, PETRI_PLACES=637, PETRI_TRANSITIONS=659} [2022-07-19 20:58:59,665 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 383 predicate places. [2022-07-19 20:58:59,665 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 659 transitions, 5759 flow [2022-07-19 20:58:59,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 130.3125) internal successors, (6255), 48 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:58:59,666 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:58:59,667 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:58:59,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 20:58:59,667 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:58:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:58:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash -806597076, now seen corresponding path program 4 times [2022-07-19 20:58:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:58:59,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568666334] [2022-07-19 20:58:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:58:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:58:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:59:02,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568666334] [2022-07-19 20:59:02,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568666334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:02,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:02,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-07-19 20:59:02,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37905184] [2022-07-19 20:59:02,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 20:59:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 20:59:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 20:59:02,571 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 274 [2022-07-19 20:59:02,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 659 transitions, 5759 flow. Second operand has 45 states, 45 states have (on average 136.4) internal successors, (6138), 45 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:02,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:02,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 274 [2022-07-19 20:59:02,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:20,185 INFO L129 PetriNetUnfolder]: 9536/22841 cut-off events. [2022-07-19 20:59:20,185 INFO L130 PetriNetUnfolder]: For 1451081/1451211 co-relation queries the response was YES. [2022-07-19 20:59:20,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114742 conditions, 22841 events. 9536/22841 cut-off events. For 1451081/1451211 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 197926 event pairs, 2435 based on Foata normal form. 143/22483 useless extension candidates. Maximal degree in co-relation 114577. Up to 12499 conditions per place. [2022-07-19 20:59:20,788 INFO L132 encePairwiseOnDemand]: 220/274 looper letters, 695 selfloop transitions, 168 changer transitions 43/1032 dead transitions. [2022-07-19 20:59:20,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 1032 transitions, 11396 flow [2022-07-19 20:59:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-19 20:59:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-19 20:59:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 9504 transitions. [2022-07-19 20:59:20,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5177034535352435 [2022-07-19 20:59:20,797 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 9504 transitions. [2022-07-19 20:59:20,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 9504 transitions. [2022-07-19 20:59:20,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:20,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 9504 transitions. [2022-07-19 20:59:20,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 141.8507462686567) internal successors, (9504), 67 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:20,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 274.0) internal successors, (18632), 68 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:20,984 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 274.0) internal successors, (18632), 68 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:20,985 INFO L186 Difference]: Start difference. First operand has 637 places, 659 transitions, 5759 flow. Second operand 67 states and 9504 transitions. [2022-07-19 20:59:20,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 1032 transitions, 11396 flow [2022-07-19 20:59:23,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 1032 transitions, 10704 flow, removed 325 selfloop flow, removed 14 redundant places. [2022-07-19 20:59:23,490 INFO L242 Difference]: Finished difference. Result has 717 places, 746 transitions, 7055 flow [2022-07-19 20:59:23,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7055, PETRI_PLACES=717, PETRI_TRANSITIONS=746} [2022-07-19 20:59:23,491 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 463 predicate places. [2022-07-19 20:59:23,492 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 746 transitions, 7055 flow [2022-07-19 20:59:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 136.4) internal successors, (6138), 45 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:23,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:23,493 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:23,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 20:59:23,493 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:59:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2146314864, now seen corresponding path program 5 times [2022-07-19 20:59:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434747593] [2022-07-19 20:59:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:59:26,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434747593] [2022-07-19 20:59:26,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434747593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:26,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:26,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-07-19 20:59:26,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140006867] [2022-07-19 20:59:26,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:26,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 20:59:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 20:59:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1817, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 20:59:26,032 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 274 [2022-07-19 20:59:26,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 746 transitions, 7055 flow. Second operand has 45 states, 45 states have (on average 136.4) internal successors, (6138), 45 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:26,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:26,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 274 [2022-07-19 20:59:26,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:44,356 INFO L129 PetriNetUnfolder]: 10584/25348 cut-off events. [2022-07-19 20:59:44,356 INFO L130 PetriNetUnfolder]: For 2486038/2486222 co-relation queries the response was YES. [2022-07-19 20:59:45,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137710 conditions, 25348 events. 10584/25348 cut-off events. For 2486038/2486222 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 224997 event pairs, 2808 based on Foata normal form. 159/24944 useless extension candidates. Maximal degree in co-relation 137517. Up to 14281 conditions per place. [2022-07-19 20:59:45,075 INFO L132 encePairwiseOnDemand]: 221/274 looper letters, 776 selfloop transitions, 164 changer transitions 41/1107 dead transitions. [2022-07-19 20:59:45,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 1107 transitions, 12916 flow [2022-07-19 20:59:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 20:59:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-19 20:59:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 9358 transitions. [2022-07-19 20:59:45,080 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5174740101747402 [2022-07-19 20:59:45,080 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 9358 transitions. [2022-07-19 20:59:45,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 9358 transitions. [2022-07-19 20:59:45,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:45,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 9358 transitions. [2022-07-19 20:59:45,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 141.78787878787878) internal successors, (9358), 66 states have internal predecessors, (9358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:45,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 274.0) internal successors, (18358), 67 states have internal predecessors, (18358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:45,105 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 274.0) internal successors, (18358), 67 states have internal predecessors, (18358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:45,105 INFO L186 Difference]: Start difference. First operand has 717 places, 746 transitions, 7055 flow. Second operand 66 states and 9358 transitions. [2022-07-19 20:59:45,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 1107 transitions, 12916 flow [2022-07-19 20:59:49,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 1107 transitions, 11975 flow, removed 400 selfloop flow, removed 19 redundant places. [2022-07-19 20:59:49,208 INFO L242 Difference]: Finished difference. Result has 791 places, 829 transitions, 8181 flow [2022-07-19 20:59:49,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=8181, PETRI_PLACES=791, PETRI_TRANSITIONS=829} [2022-07-19 20:59:49,209 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 537 predicate places. [2022-07-19 20:59:49,209 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 829 transitions, 8181 flow [2022-07-19 20:59:49,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 136.4) internal successors, (6138), 45 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:49,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:49,210 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 20:59:49,210 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 20:59:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -769930222, now seen corresponding path program 6 times [2022-07-19 20:59:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:49,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771455361] [2022-07-19 20:59:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:59:52,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:52,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771455361] [2022-07-19 20:59:52,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771455361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:52,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:52,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-07-19 20:59:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292161336] [2022-07-19 20:59:52,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 20:59:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 20:59:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 20:59:52,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 274 [2022-07-19 20:59:52,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 829 transitions, 8181 flow. Second operand has 48 states, 48 states have (on average 133.3125) internal successors, (6399), 48 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:52,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:52,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 274 [2022-07-19 20:59:52,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:17,832 INFO L129 PetriNetUnfolder]: 11921/28077 cut-off events. [2022-07-19 21:00:17,832 INFO L130 PetriNetUnfolder]: For 3589872/3590112 co-relation queries the response was YES. [2022-07-19 21:00:18,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161593 conditions, 28077 events. 11921/28077 cut-off events. For 3589872/3590112 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 252788 event pairs, 3415 based on Foata normal form. 123/27583 useless extension candidates. Maximal degree in co-relation 161372. Up to 16250 conditions per place. [2022-07-19 21:00:19,034 INFO L132 encePairwiseOnDemand]: 217/274 looper letters, 866 selfloop transitions, 203 changer transitions 55/1247 dead transitions. [2022-07-19 21:00:19,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 1247 transitions, 15913 flow [2022-07-19 21:00:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-19 21:00:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-07-19 21:00:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 10672 transitions. [2022-07-19 21:00:19,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5058299364868708 [2022-07-19 21:00:19,042 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 10672 transitions. [2022-07-19 21:00:19,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 10672 transitions. [2022-07-19 21:00:19,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:19,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 10672 transitions. [2022-07-19 21:00:19,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 138.5974025974026) internal successors, (10672), 77 states have internal predecessors, (10672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:00:19,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 274.0) internal successors, (21372), 78 states have internal predecessors, (21372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:00:19,076 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 274.0) internal successors, (21372), 78 states have internal predecessors, (21372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:00:19,076 INFO L186 Difference]: Start difference. First operand has 791 places, 829 transitions, 8181 flow. Second operand 77 states and 10672 transitions. [2022-07-19 21:00:19,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 1247 transitions, 15913 flow [2022-07-19 21:00:24,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 1247 transitions, 14876 flow, removed 469 selfloop flow, removed 18 redundant places. [2022-07-19 21:00:24,609 INFO L242 Difference]: Finished difference. Result has 880 places, 921 transitions, 9525 flow [2022-07-19 21:00:24,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=9525, PETRI_PLACES=880, PETRI_TRANSITIONS=921} [2022-07-19 21:00:24,610 INFO L279 CegarLoopForPetriNet]: 254 programPoint places, 626 predicate places. [2022-07-19 21:00:24,610 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 921 transitions, 9525 flow [2022-07-19 21:00:24,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 133.3125) internal successors, (6399), 48 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:00:24,611 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:24,612 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:24,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:00:24,612 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash 178665072, now seen corresponding path program 7 times [2022-07-19 21:00:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:24,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816781047] [2022-07-19 21:00:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:42,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816781047] [2022-07-19 21:00:42,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816781047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:42,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:42,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-07-19 21:00:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778502029] [2022-07-19 21:00:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:42,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 21:00:42,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 21:00:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2156, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 21:00:42,784 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 274 [2022-07-19 21:00:42,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 921 transitions, 9525 flow. Second operand has 49 states, 49 states have (on average 133.26530612244898) internal successors, (6530), 49 states have internal predecessors, (6530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:00:42,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:42,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 274 [2022-07-19 21:00:42,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand