./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-match-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-match-trans.wvr.c -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 4221a6bcee4165c3049aa9b16a70613c9e290b9c0a4ff35026a6f2dcff16f9ff --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:40:46,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:40:46,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:40:46,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:40:46,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:40:46,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:40:46,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:40:46,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:40:46,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:40:46,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:40:46,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:40:46,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:40:46,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:40:46,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:40:46,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:40:46,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:40:46,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:40:46,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:40:46,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:40:46,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:40:46,732 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:40:46,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:40:46,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:40:46,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:40:46,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:40:46,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:40:46,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:40:46,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:40:46,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:40:46,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:40:46,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:40:46,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:40:46,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:40:46,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:40:46,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:40:46,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:40:46,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:40:46,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:40:46,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:40:46,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:40:46,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:40:46,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:40:46,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:40:46,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:40:46,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:40:46,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:40:46,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:40:46,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:40:46,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:40:46,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:40:46,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:40:46,781 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:40:46,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:40:46,782 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:40:46,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:40:46,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:40:46,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:40:46,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:40:46,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:40:46,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:40:46,783 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:40:46,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:40:46,784 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:40:46,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:40:46,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:40:46,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:40:46,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:40:46,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:40:46,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:40:46,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:40:46,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:40:46,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:40:46,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:40:46,786 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:40:46,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:40:46,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:40:46,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4221a6bcee4165c3049aa9b16a70613c9e290b9c0a4ff35026a6f2dcff16f9ff [2022-07-22 21:40:46,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:40:46,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:40:46,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:40:46,956 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:40:46,956 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:40:46,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-match-trans.wvr.c [2022-07-22 21:40:46,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb558e93/d794043f7c6d4dacbb05d76fb1187da4/FLAGccf3a034c [2022-07-22 21:40:47,387 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:40:47,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-match-trans.wvr.c [2022-07-22 21:40:47,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb558e93/d794043f7c6d4dacbb05d76fb1187da4/FLAGccf3a034c [2022-07-22 21:40:47,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb558e93/d794043f7c6d4dacbb05d76fb1187da4 [2022-07-22 21:40:47,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:40:47,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:40:47,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:40:47,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:40:47,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:40:47,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccfb78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47, skipping insertion in model container [2022-07-22 21:40:47,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:40:47,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:40:47,620 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/weaver/chl-match-trans.wvr.c[2954,2967] [2022-07-22 21:40:47,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:40:47,628 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:40:47,657 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/weaver/chl-match-trans.wvr.c[2954,2967] [2022-07-22 21:40:47,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:40:47,673 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:40:47,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47 WrapperNode [2022-07-22 21:40:47,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:40:47,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:40:47,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:40:47,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:40:47,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,721 INFO L137 Inliner]: procedures = 23, calls = 33, calls flagged for inlining = 11, calls inlined = 21, statements flattened = 250 [2022-07-22 21:40:47,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:40:47,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:40:47,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:40:47,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:40:47,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:40:47,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:40:47,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:40:47,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:40:47,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (1/1) ... [2022-07-22 21:40:47,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:40:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:40:47,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:40:47,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:40:47,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:40:47,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:40:47,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:40:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:40:47,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:40:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:40:47,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:40:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:40:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:40:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:40:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:40:47,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:40:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:40:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:40:47,817 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:40:47,880 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:40:47,882 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:40:48,172 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:40:48,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:40:48,181 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 21:40:48,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:40:48 BoogieIcfgContainer [2022-07-22 21:40:48,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:40:48,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:40:48,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:40:48,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:40:48,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:40:47" (1/3) ... [2022-07-22 21:40:48,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cff754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:40:48, skipping insertion in model container [2022-07-22 21:40:48,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:40:47" (2/3) ... [2022-07-22 21:40:48,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cff754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:40:48, skipping insertion in model container [2022-07-22 21:40:48,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:40:48" (3/3) ... [2022-07-22 21:40:48,209 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-match-trans.wvr.c [2022-07-22 21:40:48,212 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:40:48,226 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:40:48,227 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:40:48,227 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:40:48,314 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:40:48,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 326 places, 341 transitions, 706 flow [2022-07-22 21:40:48,449 INFO L129 PetriNetUnfolder]: 25/338 cut-off events. [2022-07-22 21:40:48,449 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:40:48,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 25/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 630 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 256. Up to 2 conditions per place. [2022-07-22 21:40:48,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 341 transitions, 706 flow [2022-07-22 21:40:48,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 327 transitions, 672 flow [2022-07-22 21:40:48,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:40:48,489 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@2d72ec4a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c26e7c3 [2022-07-22 21:40:48,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:40:48,540 INFO L129 PetriNetUnfolder]: 25/326 cut-off events. [2022-07-22 21:40:48,541 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:40:48,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:48,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:48,543 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 1 more)] === [2022-07-22 21:40:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1820755081, now seen corresponding path program 1 times [2022-07-22 21:40:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:48,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641543114] [2022-07-22 21:40:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:49,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641543114] [2022-07-22 21:40:49,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641543114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:49,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:49,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:40:49,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664281916] [2022-07-22 21:40:49,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:49,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:40:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:49,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:40:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:40:49,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 341 [2022-07-22 21:40:49,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 327 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 309.57142857142856) internal successors, (2167), 7 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:49,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 341 [2022-07-22 21:40:49,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:49,327 INFO L129 PetriNetUnfolder]: 87/826 cut-off events. [2022-07-22 21:40:49,327 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-07-22 21:40:49,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 826 events. 87/826 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4460 event pairs, 31 based on Foata normal form. 150/899 useless extension candidates. Maximal degree in co-relation 845. Up to 72 conditions per place. [2022-07-22 21:40:49,354 INFO L132 encePairwiseOnDemand]: 319/341 looper letters, 30 selfloop transitions, 5 changer transitions 6/335 dead transitions. [2022-07-22 21:40:49,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 335 transitions, 797 flow [2022-07-22 21:40:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:40:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:40:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2843 transitions. [2022-07-22 21:40:49,399 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9263603779732812 [2022-07-22 21:40:49,400 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2843 transitions. [2022-07-22 21:40:49,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2843 transitions. [2022-07-22 21:40:49,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:49,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2843 transitions. [2022-07-22 21:40:49,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 315.8888888888889) internal successors, (2843), 9 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,422 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,424 INFO L186 Difference]: Start difference. First operand has 312 places, 327 transitions, 672 flow. Second operand 9 states and 2843 transitions. [2022-07-22 21:40:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 335 transitions, 797 flow [2022-07-22 21:40:49,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 335 transitions, 767 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:40:49,439 INFO L242 Difference]: Finished difference. Result has 319 places, 315 transitions, 661 flow [2022-07-22 21:40:49,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=319, PETRI_TRANSITIONS=315} [2022-07-22 21:40:49,443 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 7 predicate places. [2022-07-22 21:40:49,444 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 315 transitions, 661 flow [2022-07-22 21:40:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 309.57142857142856) internal successors, (2167), 7 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:49,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:49,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:40:49,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:49,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1029800647, now seen corresponding path program 1 times [2022-07-22 21:40:49,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:49,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727026234] [2022-07-22 21:40:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:49,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:49,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:49,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727026234] [2022-07-22 21:40:49,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727026234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:49,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:49,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:40:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261563628] [2022-07-22 21:40:49,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:40:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:40:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:40:49,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 341 [2022-07-22 21:40:49,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 315 transitions, 661 flow. Second operand has 6 states, 6 states have (on average 313.3333333333333) internal successors, (1880), 6 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:49,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 341 [2022-07-22 21:40:49,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:49,775 INFO L129 PetriNetUnfolder]: 32/499 cut-off events. [2022-07-22 21:40:49,775 INFO L130 PetriNetUnfolder]: For 25/34 co-relation queries the response was YES. [2022-07-22 21:40:49,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 499 events. 32/499 cut-off events. For 25/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1901 event pairs, 9 based on Foata normal form. 5/462 useless extension candidates. Maximal degree in co-relation 580. Up to 36 conditions per place. [2022-07-22 21:40:49,782 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 21 selfloop transitions, 3 changer transitions 4/328 dead transitions. [2022-07-22 21:40:49,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 328 transitions, 755 flow [2022-07-22 21:40:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:40:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:40:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2206 transitions. [2022-07-22 21:40:49,785 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9241726015919565 [2022-07-22 21:40:49,785 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2206 transitions. [2022-07-22 21:40:49,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2206 transitions. [2022-07-22 21:40:49,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:49,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2206 transitions. [2022-07-22 21:40:49,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 315.14285714285717) internal successors, (2206), 7 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,794 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 341.0) internal successors, (2728), 8 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,794 INFO L186 Difference]: Start difference. First operand has 319 places, 315 transitions, 661 flow. Second operand 7 states and 2206 transitions. [2022-07-22 21:40:49,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 328 transitions, 755 flow [2022-07-22 21:40:49,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 328 transitions, 744 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-22 21:40:49,800 INFO L242 Difference]: Finished difference. Result has 322 places, 317 transitions, 677 flow [2022-07-22 21:40:49,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=322, PETRI_TRANSITIONS=317} [2022-07-22 21:40:49,801 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 10 predicate places. [2022-07-22 21:40:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 317 transitions, 677 flow [2022-07-22 21:40:49,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 313.3333333333333) internal successors, (1880), 6 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,803 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:49,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:49,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:40:49,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 256111993, now seen corresponding path program 1 times [2022-07-22 21:40:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:49,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395548309] [2022-07-22 21:40:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:49,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395548309] [2022-07-22 21:40:49,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395548309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:49,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:49,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676530082] [2022-07-22 21:40:49,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:49,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:49,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:49,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 317 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:49,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:49,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:49,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:50,378 INFO L129 PetriNetUnfolder]: 545/3126 cut-off events. [2022-07-22 21:40:50,379 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-22 21:40:50,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4009 conditions, 3126 events. 545/3126 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 27689 event pairs, 266 based on Foata normal form. 0/2640 useless extension candidates. Maximal degree in co-relation 3986. Up to 474 conditions per place. [2022-07-22 21:40:50,404 INFO L132 encePairwiseOnDemand]: 337/341 looper letters, 41 selfloop transitions, 2 changer transitions 3/336 dead transitions. [2022-07-22 21:40:50,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 336 transitions, 810 flow [2022-07-22 21:40:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:40:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:40:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1257 transitions. [2022-07-22 21:40:50,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9215542521994134 [2022-07-22 21:40:50,408 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1257 transitions. [2022-07-22 21:40:50,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1257 transitions. [2022-07-22 21:40:50,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:50,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1257 transitions. [2022-07-22 21:40:50,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,415 INFO L186 Difference]: Start difference. First operand has 322 places, 317 transitions, 677 flow. Second operand 4 states and 1257 transitions. [2022-07-22 21:40:50,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 336 transitions, 810 flow [2022-07-22 21:40:50,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 336 transitions, 805 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:40:50,424 INFO L242 Difference]: Finished difference. Result has 322 places, 315 transitions, 671 flow [2022-07-22 21:40:50,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=671, PETRI_PLACES=322, PETRI_TRANSITIONS=315} [2022-07-22 21:40:50,426 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 10 predicate places. [2022-07-22 21:40:50,426 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 315 transitions, 671 flow [2022-07-22 21:40:50,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,427 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:50,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:40:50,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1137934317, now seen corresponding path program 2 times [2022-07-22 21:40:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:50,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309570551] [2022-07-22 21:40:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:50,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309570551] [2022-07-22 21:40:50,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309570551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:50,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:50,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:50,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694257873] [2022-07-22 21:40:50,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:50,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:50,501 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:50,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 315 transitions, 671 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:50,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:50,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:50,948 INFO L129 PetriNetUnfolder]: 509/3284 cut-off events. [2022-07-22 21:40:50,948 INFO L130 PetriNetUnfolder]: For 305/308 co-relation queries the response was YES. [2022-07-22 21:40:50,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 3284 events. 509/3284 cut-off events. For 305/308 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 29311 event pairs, 256 based on Foata normal form. 1/2910 useless extension candidates. Maximal degree in co-relation 4149. Up to 471 conditions per place. [2022-07-22 21:40:50,970 INFO L132 encePairwiseOnDemand]: 337/341 looper letters, 38 selfloop transitions, 3 changer transitions 1/332 dead transitions. [2022-07-22 21:40:50,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 332 transitions, 804 flow [2022-07-22 21:40:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:40:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:40:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1254 transitions. [2022-07-22 21:40:50,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9193548387096774 [2022-07-22 21:40:50,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1254 transitions. [2022-07-22 21:40:50,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1254 transitions. [2022-07-22 21:40:50,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:50,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1254 transitions. [2022-07-22 21:40:50,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,977 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,977 INFO L186 Difference]: Start difference. First operand has 322 places, 315 transitions, 671 flow. Second operand 4 states and 1254 transitions. [2022-07-22 21:40:50,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 332 transitions, 804 flow [2022-07-22 21:40:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 332 transitions, 796 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-22 21:40:50,983 INFO L242 Difference]: Finished difference. Result has 320 places, 317 transitions, 693 flow [2022-07-22 21:40:50,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=693, PETRI_PLACES=320, PETRI_TRANSITIONS=317} [2022-07-22 21:40:50,984 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 8 predicate places. [2022-07-22 21:40:50,984 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 317 transitions, 693 flow [2022-07-22 21:40:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:50,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:50,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:50,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:40:50,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash -138391015, now seen corresponding path program 3 times [2022-07-22 21:40:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:50,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104568108] [2022-07-22 21:40:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:50,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:51,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:51,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104568108] [2022-07-22 21:40:51,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104568108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:51,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:51,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284783395] [2022-07-22 21:40:51,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:51,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:51,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:51,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 317 transitions, 693 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:51,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:51,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:51,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:51,550 INFO L129 PetriNetUnfolder]: 491/3473 cut-off events. [2022-07-22 21:40:51,550 INFO L130 PetriNetUnfolder]: For 638/757 co-relation queries the response was YES. [2022-07-22 21:40:51,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 3473 events. 491/3473 cut-off events. For 638/757 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 31959 event pairs, 250 based on Foata normal form. 4/3137 useless extension candidates. Maximal degree in co-relation 4356. Up to 449 conditions per place. [2022-07-22 21:40:51,573 INFO L132 encePairwiseOnDemand]: 337/341 looper letters, 40 selfloop transitions, 5 changer transitions 0/335 dead transitions. [2022-07-22 21:40:51,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 335 transitions, 840 flow [2022-07-22 21:40:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:40:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:40:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1256 transitions. [2022-07-22 21:40:51,575 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9208211143695014 [2022-07-22 21:40:51,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1256 transitions. [2022-07-22 21:40:51,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1256 transitions. [2022-07-22 21:40:51,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:51,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1256 transitions. [2022-07-22 21:40:51,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:51,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:51,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:51,580 INFO L186 Difference]: Start difference. First operand has 320 places, 317 transitions, 693 flow. Second operand 4 states and 1256 transitions. [2022-07-22 21:40:51,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 335 transitions, 840 flow [2022-07-22 21:40:51,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 335 transitions, 838 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:51,586 INFO L242 Difference]: Finished difference. Result has 324 places, 318 transitions, 720 flow [2022-07-22 21:40:51,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=720, PETRI_PLACES=324, PETRI_TRANSITIONS=318} [2022-07-22 21:40:51,587 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 12 predicate places. [2022-07-22 21:40:51,587 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 318 transitions, 720 flow [2022-07-22 21:40:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:51,587 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:51,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:40:51,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2080417179, now seen corresponding path program 4 times [2022-07-22 21:40:51,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:51,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223757187] [2022-07-22 21:40:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:51,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223757187] [2022-07-22 21:40:51,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223757187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:51,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:51,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:51,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341475218] [2022-07-22 21:40:51,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:51,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:51,637 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:51,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 318 transitions, 720 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:51,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:51,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:51,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:52,077 INFO L129 PetriNetUnfolder]: 489/3530 cut-off events. [2022-07-22 21:40:52,077 INFO L130 PetriNetUnfolder]: For 1081/1203 co-relation queries the response was YES. [2022-07-22 21:40:52,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4764 conditions, 3530 events. 489/3530 cut-off events. For 1081/1203 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 32479 event pairs, 259 based on Foata normal form. 2/3189 useless extension candidates. Maximal degree in co-relation 4514. Up to 480 conditions per place. [2022-07-22 21:40:52,105 INFO L132 encePairwiseOnDemand]: 337/341 looper letters, 40 selfloop transitions, 3 changer transitions 1/334 dead transitions. [2022-07-22 21:40:52,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 334 transitions, 862 flow [2022-07-22 21:40:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:40:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:40:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1254 transitions. [2022-07-22 21:40:52,108 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9193548387096774 [2022-07-22 21:40:52,108 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1254 transitions. [2022-07-22 21:40:52,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1254 transitions. [2022-07-22 21:40:52,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:52,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1254 transitions. [2022-07-22 21:40:52,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 313.5) internal successors, (1254), 4 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,113 INFO L186 Difference]: Start difference. First operand has 324 places, 318 transitions, 720 flow. Second operand 4 states and 1254 transitions. [2022-07-22 21:40:52,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 334 transitions, 862 flow [2022-07-22 21:40:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 334 transitions, 858 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:52,120 INFO L242 Difference]: Finished difference. Result has 328 places, 320 transitions, 753 flow [2022-07-22 21:40:52,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=753, PETRI_PLACES=328, PETRI_TRANSITIONS=320} [2022-07-22 21:40:52,122 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 16 predicate places. [2022-07-22 21:40:52,123 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 320 transitions, 753 flow [2022-07-22 21:40:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:52,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:40:52,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1677872801, now seen corresponding path program 5 times [2022-07-22 21:40:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:52,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714941903] [2022-07-22 21:40:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:52,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:52,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714941903] [2022-07-22 21:40:52,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714941903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:52,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:52,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22844147] [2022-07-22 21:40:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:52,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:52,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:52,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 320 transitions, 753 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:52,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:52,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:52,585 INFO L129 PetriNetUnfolder]: 462/3393 cut-off events. [2022-07-22 21:40:52,585 INFO L130 PetriNetUnfolder]: For 1410/1592 co-relation queries the response was YES. [2022-07-22 21:40:52,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4719 conditions, 3393 events. 462/3393 cut-off events. For 1410/1592 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 31392 event pairs, 224 based on Foata normal form. 4/3120 useless extension candidates. Maximal degree in co-relation 4492. Up to 404 conditions per place. [2022-07-22 21:40:52,617 INFO L132 encePairwiseOnDemand]: 337/341 looper letters, 40 selfloop transitions, 5 changer transitions 1/336 dead transitions. [2022-07-22 21:40:52,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 336 transitions, 888 flow [2022-07-22 21:40:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:40:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:40:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1256 transitions. [2022-07-22 21:40:52,620 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9208211143695014 [2022-07-22 21:40:52,620 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1256 transitions. [2022-07-22 21:40:52,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1256 transitions. [2022-07-22 21:40:52,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:52,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1256 transitions. [2022-07-22 21:40:52,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,625 INFO L186 Difference]: Start difference. First operand has 328 places, 320 transitions, 753 flow. Second operand 4 states and 1256 transitions. [2022-07-22 21:40:52,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 336 transitions, 888 flow [2022-07-22 21:40:52,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 336 transitions, 886 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:52,665 INFO L242 Difference]: Finished difference. Result has 332 places, 320 transitions, 768 flow [2022-07-22 21:40:52,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=768, PETRI_PLACES=332, PETRI_TRANSITIONS=320} [2022-07-22 21:40:52,666 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 20 predicate places. [2022-07-22 21:40:52,666 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 320 transitions, 768 flow [2022-07-22 21:40:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,666 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:52,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:40:52,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 322940101, now seen corresponding path program 6 times [2022-07-22 21:40:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:52,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825568354] [2022-07-22 21:40:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:52,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:52,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825568354] [2022-07-22 21:40:52,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825568354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:52,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:52,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052458172] [2022-07-22 21:40:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:52,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:52,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:52,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:52,729 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:52,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 320 transitions, 768 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:52,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:52,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:52,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:53,210 INFO L129 PetriNetUnfolder]: 485/3470 cut-off events. [2022-07-22 21:40:53,210 INFO L130 PetriNetUnfolder]: For 2120/2475 co-relation queries the response was YES. [2022-07-22 21:40:53,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4933 conditions, 3470 events. 485/3470 cut-off events. For 2120/2475 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 31905 event pairs, 247 based on Foata normal form. 3/3169 useless extension candidates. Maximal degree in co-relation 4700. Up to 459 conditions per place. [2022-07-22 21:40:53,245 INFO L132 encePairwiseOnDemand]: 337/341 looper letters, 40 selfloop transitions, 4 changer transitions 1/335 dead transitions. [2022-07-22 21:40:53,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 335 transitions, 896 flow [2022-07-22 21:40:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:40:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:40:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1255 transitions. [2022-07-22 21:40:53,248 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9200879765395894 [2022-07-22 21:40:53,248 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1255 transitions. [2022-07-22 21:40:53,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1255 transitions. [2022-07-22 21:40:53,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:53,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1255 transitions. [2022-07-22 21:40:53,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 313.75) internal successors, (1255), 4 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,253 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 341.0) internal successors, (1705), 5 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,253 INFO L186 Difference]: Start difference. First operand has 332 places, 320 transitions, 768 flow. Second operand 4 states and 1255 transitions. [2022-07-22 21:40:53,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 335 transitions, 896 flow [2022-07-22 21:40:53,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 335 transitions, 893 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:53,261 INFO L242 Difference]: Finished difference. Result has 336 places, 320 transitions, 777 flow [2022-07-22 21:40:53,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=777, PETRI_PLACES=336, PETRI_TRANSITIONS=320} [2022-07-22 21:40:53,262 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 24 predicate places. [2022-07-22 21:40:53,262 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 320 transitions, 777 flow [2022-07-22 21:40:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:53,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:53,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:40:53,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1741390485, now seen corresponding path program 1 times [2022-07-22 21:40:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:53,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536077287] [2022-07-22 21:40:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:53,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:53,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:53,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536077287] [2022-07-22 21:40:53,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536077287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:53,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:53,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953632650] [2022-07-22 21:40:53,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:53,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:53,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:53,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 320 transitions, 777 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:53,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:53,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:53,769 INFO L129 PetriNetUnfolder]: 456/3605 cut-off events. [2022-07-22 21:40:53,769 INFO L130 PetriNetUnfolder]: For 2436/2467 co-relation queries the response was YES. [2022-07-22 21:40:53,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 3605 events. 456/3605 cut-off events. For 2436/2467 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 34903 event pairs, 95 based on Foata normal form. 13/3405 useless extension candidates. Maximal degree in co-relation 5004. Up to 273 conditions per place. [2022-07-22 21:40:53,803 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 53 selfloop transitions, 8 changer transitions 7/358 dead transitions. [2022-07-22 21:40:53,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 358 transitions, 1122 flow [2022-07-22 21:40:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1576 transitions. [2022-07-22 21:40:53,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9243401759530792 [2022-07-22 21:40:53,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1576 transitions. [2022-07-22 21:40:53,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1576 transitions. [2022-07-22 21:40:53,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:53,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1576 transitions. [2022-07-22 21:40:53,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.2) internal successors, (1576), 5 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,811 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,812 INFO L186 Difference]: Start difference. First operand has 336 places, 320 transitions, 777 flow. Second operand 5 states and 1576 transitions. [2022-07-22 21:40:53,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 358 transitions, 1122 flow [2022-07-22 21:40:53,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 358 transitions, 1117 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:53,821 INFO L242 Difference]: Finished difference. Result has 342 places, 327 transitions, 866 flow [2022-07-22 21:40:53,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=342, PETRI_TRANSITIONS=327} [2022-07-22 21:40:53,822 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 30 predicate places. [2022-07-22 21:40:53,822 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 327 transitions, 866 flow [2022-07-22 21:40:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:53,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:53,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:40:53,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash -66364223, now seen corresponding path program 1 times [2022-07-22 21:40:53,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:53,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695019429] [2022-07-22 21:40:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695019429] [2022-07-22 21:40:53,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695019429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:53,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:53,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82747714] [2022-07-22 21:40:53,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:53,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:53,874 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:53,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 327 transitions, 866 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:53,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:53,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:53,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:54,335 INFO L129 PetriNetUnfolder]: 457/3629 cut-off events. [2022-07-22 21:40:54,335 INFO L130 PetriNetUnfolder]: For 2960/2978 co-relation queries the response was YES. [2022-07-22 21:40:54,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5691 conditions, 3629 events. 457/3629 cut-off events. For 2960/2978 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 35876 event pairs, 74 based on Foata normal form. 9/3472 useless extension candidates. Maximal degree in co-relation 5396. Up to 349 conditions per place. [2022-07-22 21:40:54,370 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 57 selfloop transitions, 11 changer transitions 3/361 dead transitions. [2022-07-22 21:40:54,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 361 transitions, 1232 flow [2022-07-22 21:40:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1571 transitions. [2022-07-22 21:40:54,373 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9214076246334311 [2022-07-22 21:40:54,373 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1571 transitions. [2022-07-22 21:40:54,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1571 transitions. [2022-07-22 21:40:54,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:54,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1571 transitions. [2022-07-22 21:40:54,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.2) internal successors, (1571), 5 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,379 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,379 INFO L186 Difference]: Start difference. First operand has 342 places, 327 transitions, 866 flow. Second operand 5 states and 1571 transitions. [2022-07-22 21:40:54,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 361 transitions, 1232 flow [2022-07-22 21:40:54,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 361 transitions, 1215 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:54,390 INFO L242 Difference]: Finished difference. Result has 348 places, 336 transitions, 973 flow [2022-07-22 21:40:54,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=348, PETRI_TRANSITIONS=336} [2022-07-22 21:40:54,391 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 36 predicate places. [2022-07-22 21:40:54,391 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 336 transitions, 973 flow [2022-07-22 21:40:54,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,391 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:54,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:54,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:40:54,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1461834575, now seen corresponding path program 1 times [2022-07-22 21:40:54,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:54,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286156319] [2022-07-22 21:40:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:54,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:54,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:54,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286156319] [2022-07-22 21:40:54,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286156319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:54,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:54,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:40:54,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808267676] [2022-07-22 21:40:54,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:54,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:40:54,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:40:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:40:54,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 341 [2022-07-22 21:40:54,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 336 transitions, 973 flow. Second operand has 7 states, 7 states have (on average 310.2857142857143) internal successors, (2172), 7 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:54,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 341 [2022-07-22 21:40:54,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:54,734 INFO L129 PetriNetUnfolder]: 290/1856 cut-off events. [2022-07-22 21:40:54,734 INFO L130 PetriNetUnfolder]: For 1228/1414 co-relation queries the response was YES. [2022-07-22 21:40:54,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 1856 events. 290/1856 cut-off events. For 1228/1414 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16502 event pairs, 139 based on Foata normal form. 9/1721 useless extension candidates. Maximal degree in co-relation 2515. Up to 421 conditions per place. [2022-07-22 21:40:54,754 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 22 selfloop transitions, 5 changer transitions 10/354 dead transitions. [2022-07-22 21:40:54,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 354 transitions, 1094 flow [2022-07-22 21:40:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:40:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:40:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2809 transitions. [2022-07-22 21:40:54,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152818507657218 [2022-07-22 21:40:54,758 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2809 transitions. [2022-07-22 21:40:54,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2809 transitions. [2022-07-22 21:40:54,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:54,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2809 transitions. [2022-07-22 21:40:54,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 312.1111111111111) internal successors, (2809), 9 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,767 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,767 INFO L186 Difference]: Start difference. First operand has 348 places, 336 transitions, 973 flow. Second operand 9 states and 2809 transitions. [2022-07-22 21:40:54,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 354 transitions, 1094 flow [2022-07-22 21:40:54,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 354 transitions, 1084 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-07-22 21:40:54,773 INFO L242 Difference]: Finished difference. Result has 363 places, 339 transitions, 988 flow [2022-07-22 21:40:54,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=988, PETRI_PLACES=363, PETRI_TRANSITIONS=339} [2022-07-22 21:40:54,774 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 51 predicate places. [2022-07-22 21:40:54,774 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 339 transitions, 988 flow [2022-07-22 21:40:54,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 310.2857142857143) internal successors, (2172), 7 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:54,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:54,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:40:54,775 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash 105452933, now seen corresponding path program 2 times [2022-07-22 21:40:54,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556960427] [2022-07-22 21:40:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:54,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:54,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:54,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556960427] [2022-07-22 21:40:54,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556960427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:54,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:54,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:54,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629512088] [2022-07-22 21:40:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:54,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:54,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:54,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:54,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 339 transitions, 988 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:54,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:54,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:54,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:55,342 INFO L129 PetriNetUnfolder]: 482/4161 cut-off events. [2022-07-22 21:40:55,342 INFO L130 PetriNetUnfolder]: For 4485/5004 co-relation queries the response was YES. [2022-07-22 21:40:55,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7045 conditions, 4161 events. 482/4161 cut-off events. For 4485/5004 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 41384 event pairs, 184 based on Foata normal form. 24/3891 useless extension candidates. Maximal degree in co-relation 6961. Up to 346 conditions per place. [2022-07-22 21:40:55,384 INFO L132 encePairwiseOnDemand]: 332/341 looper letters, 47 selfloop transitions, 15 changer transitions 16/372 dead transitions. [2022-07-22 21:40:55,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 372 transitions, 1336 flow [2022-07-22 21:40:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1578 transitions. [2022-07-22 21:40:55,387 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9255131964809384 [2022-07-22 21:40:55,387 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1578 transitions. [2022-07-22 21:40:55,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1578 transitions. [2022-07-22 21:40:55,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:55,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1578 transitions. [2022-07-22 21:40:55,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:55,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:55,392 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:55,392 INFO L186 Difference]: Start difference. First operand has 363 places, 339 transitions, 988 flow. Second operand 5 states and 1578 transitions. [2022-07-22 21:40:55,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 372 transitions, 1336 flow [2022-07-22 21:40:55,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 372 transitions, 1318 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-07-22 21:40:55,410 INFO L242 Difference]: Finished difference. Result has 364 places, 339 transitions, 1038 flow [2022-07-22 21:40:55,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1038, PETRI_PLACES=364, PETRI_TRANSITIONS=339} [2022-07-22 21:40:55,411 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 52 predicate places. [2022-07-22 21:40:55,411 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 339 transitions, 1038 flow [2022-07-22 21:40:55,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:55,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:55,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:55,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:40:55,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash -257520831, now seen corresponding path program 2 times [2022-07-22 21:40:55,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790143323] [2022-07-22 21:40:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:55,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790143323] [2022-07-22 21:40:55,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790143323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:55,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:55,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:55,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023147680] [2022-07-22 21:40:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:55,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:55,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 339 transitions, 1038 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:55,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:55,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:55,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:55,953 INFO L129 PetriNetUnfolder]: 442/3991 cut-off events. [2022-07-22 21:40:55,954 INFO L130 PetriNetUnfolder]: For 4741/5147 co-relation queries the response was YES. [2022-07-22 21:40:55,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 3991 events. 442/3991 cut-off events. For 4741/5147 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 39459 event pairs, 189 based on Foata normal form. 19/3722 useless extension candidates. Maximal degree in co-relation 6476. Up to 367 conditions per place. [2022-07-22 21:40:55,992 INFO L132 encePairwiseOnDemand]: 332/341 looper letters, 51 selfloop transitions, 18 changer transitions 6/369 dead transitions. [2022-07-22 21:40:55,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 369 transitions, 1380 flow [2022-07-22 21:40:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1577 transitions. [2022-07-22 21:40:55,995 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9249266862170088 [2022-07-22 21:40:55,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1577 transitions. [2022-07-22 21:40:55,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1577 transitions. [2022-07-22 21:40:55,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:55,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1577 transitions. [2022-07-22 21:40:55,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,001 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,002 INFO L186 Difference]: Start difference. First operand has 364 places, 339 transitions, 1038 flow. Second operand 5 states and 1577 transitions. [2022-07-22 21:40:56,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 369 transitions, 1380 flow [2022-07-22 21:40:56,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 369 transitions, 1364 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:56,022 INFO L242 Difference]: Finished difference. Result has 370 places, 346 transitions, 1183 flow [2022-07-22 21:40:56,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1183, PETRI_PLACES=370, PETRI_TRANSITIONS=346} [2022-07-22 21:40:56,023 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 58 predicate places. [2022-07-22 21:40:56,023 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 346 transitions, 1183 flow [2022-07-22 21:40:56,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,024 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:56,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:56,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:40:56,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2045686251, now seen corresponding path program 3 times [2022-07-22 21:40:56,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:56,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420404150] [2022-07-22 21:40:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420404150] [2022-07-22 21:40:56,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420404150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:56,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:56,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596742018] [2022-07-22 21:40:56,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:56,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:56,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 346 transitions, 1183 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:56,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:56,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:56,551 INFO L129 PetriNetUnfolder]: 398/3511 cut-off events. [2022-07-22 21:40:56,551 INFO L130 PetriNetUnfolder]: For 5542/5550 co-relation queries the response was YES. [2022-07-22 21:40:56,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6619 conditions, 3511 events. 398/3511 cut-off events. For 5542/5550 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 34895 event pairs, 75 based on Foata normal form. 8/3355 useless extension candidates. Maximal degree in co-relation 6205. Up to 385 conditions per place. [2022-07-22 21:40:56,576 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 73 selfloop transitions, 9 changer transitions 6/382 dead transitions. [2022-07-22 21:40:56,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 382 transitions, 1676 flow [2022-07-22 21:40:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1572 transitions. [2022-07-22 21:40:56,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9219941348973607 [2022-07-22 21:40:56,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1572 transitions. [2022-07-22 21:40:56,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1572 transitions. [2022-07-22 21:40:56,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:56,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1572 transitions. [2022-07-22 21:40:56,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,584 INFO L186 Difference]: Start difference. First operand has 370 places, 346 transitions, 1183 flow. Second operand 5 states and 1572 transitions. [2022-07-22 21:40:56,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 382 transitions, 1676 flow [2022-07-22 21:40:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 382 transitions, 1648 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-07-22 21:40:56,605 INFO L242 Difference]: Finished difference. Result has 375 places, 352 transitions, 1259 flow [2022-07-22 21:40:56,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1259, PETRI_PLACES=375, PETRI_TRANSITIONS=352} [2022-07-22 21:40:56,606 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 63 predicate places. [2022-07-22 21:40:56,606 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 352 transitions, 1259 flow [2022-07-22 21:40:56,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:56,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:56,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:40:56,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1602283859, now seen corresponding path program 4 times [2022-07-22 21:40:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:56,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334713303] [2022-07-22 21:40:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:56,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:56,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334713303] [2022-07-22 21:40:56,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334713303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:56,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:56,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:56,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094648098] [2022-07-22 21:40:56,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:56,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:56,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:56,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 352 transitions, 1259 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:56,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:56,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:56,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:57,167 INFO L129 PetriNetUnfolder]: 422/3911 cut-off events. [2022-07-22 21:40:57,167 INFO L130 PetriNetUnfolder]: For 6549/6762 co-relation queries the response was YES. [2022-07-22 21:40:57,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7224 conditions, 3911 events. 422/3911 cut-off events. For 6549/6762 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 38789 event pairs, 173 based on Foata normal form. 13/3664 useless extension candidates. Maximal degree in co-relation 6815. Up to 444 conditions per place. [2022-07-22 21:40:57,208 INFO L132 encePairwiseOnDemand]: 331/341 looper letters, 75 selfloop transitions, 12 changer transitions 5/386 dead transitions. [2022-07-22 21:40:57,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 386 transitions, 1708 flow [2022-07-22 21:40:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1577 transitions. [2022-07-22 21:40:57,211 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9249266862170088 [2022-07-22 21:40:57,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1577 transitions. [2022-07-22 21:40:57,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1577 transitions. [2022-07-22 21:40:57,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:57,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1577 transitions. [2022-07-22 21:40:57,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,216 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,216 INFO L186 Difference]: Start difference. First operand has 375 places, 352 transitions, 1259 flow. Second operand 5 states and 1577 transitions. [2022-07-22 21:40:57,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 386 transitions, 1708 flow [2022-07-22 21:40:57,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 386 transitions, 1694 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-07-22 21:40:57,245 INFO L242 Difference]: Finished difference. Result has 382 places, 359 transitions, 1389 flow [2022-07-22 21:40:57,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1389, PETRI_PLACES=382, PETRI_TRANSITIONS=359} [2022-07-22 21:40:57,246 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 70 predicate places. [2022-07-22 21:40:57,246 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 359 transitions, 1389 flow [2022-07-22 21:40:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,246 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:57,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:57,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:40:57,247 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1030181011, now seen corresponding path program 3 times [2022-07-22 21:40:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264685756] [2022-07-22 21:40:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:57,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:57,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264685756] [2022-07-22 21:40:57,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264685756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:57,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:57,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277802601] [2022-07-22 21:40:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:57,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:57,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 359 transitions, 1389 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:57,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:57,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:57,756 INFO L129 PetriNetUnfolder]: 419/3541 cut-off events. [2022-07-22 21:40:57,757 INFO L130 PetriNetUnfolder]: For 7402/7494 co-relation queries the response was YES. [2022-07-22 21:40:57,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7028 conditions, 3541 events. 419/3541 cut-off events. For 7402/7494 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 34824 event pairs, 82 based on Foata normal form. 6/3343 useless extension candidates. Maximal degree in co-relation 6627. Up to 354 conditions per place. [2022-07-22 21:40:57,795 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 83 selfloop transitions, 12 changer transitions 13/402 dead transitions. [2022-07-22 21:40:57,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 402 transitions, 2050 flow [2022-07-22 21:40:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1575 transitions. [2022-07-22 21:40:57,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9237536656891495 [2022-07-22 21:40:57,797 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1575 transitions. [2022-07-22 21:40:57,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1575 transitions. [2022-07-22 21:40:57,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:57,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1575 transitions. [2022-07-22 21:40:57,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,801 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,802 INFO L186 Difference]: Start difference. First operand has 382 places, 359 transitions, 1389 flow. Second operand 5 states and 1575 transitions. [2022-07-22 21:40:57,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 402 transitions, 2050 flow [2022-07-22 21:40:57,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 402 transitions, 2028 flow, removed 11 selfloop flow, removed 0 redundant places. [2022-07-22 21:40:57,834 INFO L242 Difference]: Finished difference. Result has 389 places, 364 transitions, 1496 flow [2022-07-22 21:40:57,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1496, PETRI_PLACES=389, PETRI_TRANSITIONS=364} [2022-07-22 21:40:57,835 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 77 predicate places. [2022-07-22 21:40:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 364 transitions, 1496 flow [2022-07-22 21:40:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:57,836 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:40:57,837 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash 468272263, now seen corresponding path program 4 times [2022-07-22 21:40:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:57,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581593120] [2022-07-22 21:40:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581593120] [2022-07-22 21:40:57,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581593120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:57,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:57,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593808262] [2022-07-22 21:40:57,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:57,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:57,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:57,885 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:57,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 364 transitions, 1496 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:57,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:57,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:57,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:58,426 INFO L129 PetriNetUnfolder]: 415/3679 cut-off events. [2022-07-22 21:40:58,427 INFO L130 PetriNetUnfolder]: For 8606/8849 co-relation queries the response was YES. [2022-07-22 21:40:58,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7295 conditions, 3679 events. 415/3679 cut-off events. For 8606/8849 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 36200 event pairs, 184 based on Foata normal form. 4/3423 useless extension candidates. Maximal degree in co-relation 6913. Up to 494 conditions per place. [2022-07-22 21:40:58,458 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 71 selfloop transitions, 14 changer transitions 13/392 dead transitions. [2022-07-22 21:40:58,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 392 transitions, 1995 flow [2022-07-22 21:40:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1567 transitions. [2022-07-22 21:40:58,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9190615835777126 [2022-07-22 21:40:58,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1567 transitions. [2022-07-22 21:40:58,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1567 transitions. [2022-07-22 21:40:58,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:58,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1567 transitions. [2022-07-22 21:40:58,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:58,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:58,466 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:58,466 INFO L186 Difference]: Start difference. First operand has 389 places, 364 transitions, 1496 flow. Second operand 5 states and 1567 transitions. [2022-07-22 21:40:58,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 392 transitions, 1995 flow [2022-07-22 21:40:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 392 transitions, 1973 flow, removed 11 selfloop flow, removed 0 redundant places. [2022-07-22 21:40:58,498 INFO L242 Difference]: Finished difference. Result has 395 places, 366 transitions, 1563 flow [2022-07-22 21:40:58,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1563, PETRI_PLACES=395, PETRI_TRANSITIONS=366} [2022-07-22 21:40:58,499 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 83 predicate places. [2022-07-22 21:40:58,499 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 366 transitions, 1563 flow [2022-07-22 21:40:58,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:58,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:58,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:40:58,500 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1984355561, now seen corresponding path program 1 times [2022-07-22 21:40:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825690664] [2022-07-22 21:40:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:58,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:58,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825690664] [2022-07-22 21:40:58,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825690664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:58,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:58,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:58,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483346871] [2022-07-22 21:40:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:58,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:58,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 366 transitions, 1563 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:58,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:58,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:58,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:59,135 INFO L129 PetriNetUnfolder]: 460/3704 cut-off events. [2022-07-22 21:40:59,135 INFO L130 PetriNetUnfolder]: For 10185/10195 co-relation queries the response was YES. [2022-07-22 21:40:59,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7623 conditions, 3704 events. 460/3704 cut-off events. For 10185/10195 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 36306 event pairs, 43 based on Foata normal form. 12/3509 useless extension candidates. Maximal degree in co-relation 7230. Up to 424 conditions per place. [2022-07-22 21:40:59,181 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 82 selfloop transitions, 15 changer transitions 16/407 dead transitions. [2022-07-22 21:40:59,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 407 transitions, 2268 flow [2022-07-22 21:40:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2022-07-22 21:40:59,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9202346041055719 [2022-07-22 21:40:59,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2022-07-22 21:40:59,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2022-07-22 21:40:59,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:59,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2022-07-22 21:40:59,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,189 INFO L186 Difference]: Start difference. First operand has 395 places, 366 transitions, 1563 flow. Second operand 5 states and 1569 transitions. [2022-07-22 21:40:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 407 transitions, 2268 flow [2022-07-22 21:40:59,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 407 transitions, 2260 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-22 21:40:59,230 INFO L242 Difference]: Finished difference. Result has 403 places, 371 transitions, 1695 flow [2022-07-22 21:40:59,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1695, PETRI_PLACES=403, PETRI_TRANSITIONS=371} [2022-07-22 21:40:59,230 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 91 predicate places. [2022-07-22 21:40:59,231 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 371 transitions, 1695 flow [2022-07-22 21:40:59,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,231 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:59,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:40:59,232 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1300882299, now seen corresponding path program 2 times [2022-07-22 21:40:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182140657] [2022-07-22 21:40:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:59,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182140657] [2022-07-22 21:40:59,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182140657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:59,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:59,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:59,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341874195] [2022-07-22 21:40:59,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:59,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:59,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:59,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 371 transitions, 1695 flow. Second operand has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:59,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:59,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:40:59,843 INFO L129 PetriNetUnfolder]: 412/3449 cut-off events. [2022-07-22 21:40:59,843 INFO L130 PetriNetUnfolder]: For 10692/10749 co-relation queries the response was YES. [2022-07-22 21:40:59,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7273 conditions, 3449 events. 412/3449 cut-off events. For 10692/10749 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 32724 event pairs, 48 based on Foata normal form. 13/3258 useless extension candidates. Maximal degree in co-relation 6905. Up to 381 conditions per place. [2022-07-22 21:40:59,885 INFO L132 encePairwiseOnDemand]: 333/341 looper letters, 88 selfloop transitions, 17 changer transitions 7/406 dead transitions. [2022-07-22 21:40:59,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 406 transitions, 2290 flow [2022-07-22 21:40:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:40:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:40:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1573 transitions. [2022-07-22 21:40:59,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9225806451612903 [2022-07-22 21:40:59,888 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1573 transitions. [2022-07-22 21:40:59,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1573 transitions. [2022-07-22 21:40:59,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:40:59,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1573 transitions. [2022-07-22 21:40:59,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,892 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,892 INFO L186 Difference]: Start difference. First operand has 403 places, 371 transitions, 1695 flow. Second operand 5 states and 1573 transitions. [2022-07-22 21:40:59,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 406 transitions, 2290 flow [2022-07-22 21:40:59,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 406 transitions, 2252 flow, removed 19 selfloop flow, removed 0 redundant places. [2022-07-22 21:40:59,926 INFO L242 Difference]: Finished difference. Result has 411 places, 380 transitions, 1854 flow [2022-07-22 21:40:59,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1854, PETRI_PLACES=411, PETRI_TRANSITIONS=380} [2022-07-22 21:40:59,927 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 99 predicate places. [2022-07-22 21:40:59,927 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 380 transitions, 1854 flow [2022-07-22 21:40:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.25) internal successors, (1229), 4 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:40:59,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:40:59,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:40:59,928 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:40:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:40:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -290683583, now seen corresponding path program 1 times [2022-07-22 21:40:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:40:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103250925] [2022-07-22 21:40:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:40:59,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:40:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:40:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:40:59,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:40:59,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103250925] [2022-07-22 21:40:59,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103250925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:40:59,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:40:59,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:40:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611078469] [2022-07-22 21:40:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:40:59,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:40:59,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:40:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:40:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:40:59,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:40:59,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 380 transitions, 1854 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:40:59,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:40:59,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:40:59,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:00,487 INFO L129 PetriNetUnfolder]: 429/3655 cut-off events. [2022-07-22 21:41:00,487 INFO L130 PetriNetUnfolder]: For 11036/11126 co-relation queries the response was YES. [2022-07-22 21:41:00,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7754 conditions, 3655 events. 429/3655 cut-off events. For 11036/11126 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 35421 event pairs, 109 based on Foata normal form. 8/3426 useless extension candidates. Maximal degree in co-relation 7569. Up to 341 conditions per place. [2022-07-22 21:41:00,529 INFO L132 encePairwiseOnDemand]: 334/341 looper letters, 96 selfloop transitions, 18 changer transitions 4/412 dead transitions. [2022-07-22 21:41:00,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 412 transitions, 2387 flow [2022-07-22 21:41:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1574 transitions. [2022-07-22 21:41:00,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.92316715542522 [2022-07-22 21:41:00,531 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1574 transitions. [2022-07-22 21:41:00,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1574 transitions. [2022-07-22 21:41:00,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:00,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1574 transitions. [2022-07-22 21:41:00,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.8) internal successors, (1574), 5 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:00,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:00,536 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:00,536 INFO L186 Difference]: Start difference. First operand has 411 places, 380 transitions, 1854 flow. Second operand 5 states and 1574 transitions. [2022-07-22 21:41:00,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 412 transitions, 2387 flow [2022-07-22 21:41:00,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 412 transitions, 2363 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:00,571 INFO L242 Difference]: Finished difference. Result has 417 places, 387 transitions, 2010 flow [2022-07-22 21:41:00,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2010, PETRI_PLACES=417, PETRI_TRANSITIONS=387} [2022-07-22 21:41:00,571 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 105 predicate places. [2022-07-22 21:41:00,571 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 387 transitions, 2010 flow [2022-07-22 21:41:00,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:00,572 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:00,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:00,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:41:00,572 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash 153177505, now seen corresponding path program 2 times [2022-07-22 21:41:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013816312] [2022-07-22 21:41:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:00,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:00,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013816312] [2022-07-22 21:41:00,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013816312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:00,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:00,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108163838] [2022-07-22 21:41:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:00,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:00,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 387 transitions, 2010 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:00,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:00,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:00,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:01,146 INFO L129 PetriNetUnfolder]: 420/3551 cut-off events. [2022-07-22 21:41:01,146 INFO L130 PetriNetUnfolder]: For 11920/12026 co-relation queries the response was YES. [2022-07-22 21:41:01,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 3551 events. 420/3551 cut-off events. For 11920/12026 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 34309 event pairs, 102 based on Foata normal form. 4/3322 useless extension candidates. Maximal degree in co-relation 7483. Up to 376 conditions per place. [2022-07-22 21:41:01,191 INFO L132 encePairwiseOnDemand]: 334/341 looper letters, 96 selfloop transitions, 21 changer transitions 20/431 dead transitions. [2022-07-22 21:41:01,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 431 transitions, 2849 flow [2022-07-22 21:41:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1574 transitions. [2022-07-22 21:41:01,193 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.92316715542522 [2022-07-22 21:41:01,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1574 transitions. [2022-07-22 21:41:01,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1574 transitions. [2022-07-22 21:41:01,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:01,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1574 transitions. [2022-07-22 21:41:01,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.8) internal successors, (1574), 5 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,198 INFO L186 Difference]: Start difference. First operand has 417 places, 387 transitions, 2010 flow. Second operand 5 states and 1574 transitions. [2022-07-22 21:41:01,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 431 transitions, 2849 flow [2022-07-22 21:41:01,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 431 transitions, 2827 flow, removed 11 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:01,243 INFO L242 Difference]: Finished difference. Result has 424 places, 385 transitions, 2053 flow [2022-07-22 21:41:01,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2053, PETRI_PLACES=424, PETRI_TRANSITIONS=385} [2022-07-22 21:41:01,243 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 112 predicate places. [2022-07-22 21:41:01,244 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 385 transitions, 2053 flow [2022-07-22 21:41:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,244 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:01,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:01,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:41:01,244 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 981610605, now seen corresponding path program 3 times [2022-07-22 21:41:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:01,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823564477] [2022-07-22 21:41:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:01,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:01,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823564477] [2022-07-22 21:41:01,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823564477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:01,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:01,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369887978] [2022-07-22 21:41:01,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:01,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:01,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:01,282 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:01,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 385 transitions, 2053 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:01,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:01,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:01,800 INFO L129 PetriNetUnfolder]: 376/3240 cut-off events. [2022-07-22 21:41:01,800 INFO L130 PetriNetUnfolder]: For 11260/11350 co-relation queries the response was YES. [2022-07-22 21:41:01,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6963 conditions, 3240 events. 376/3240 cut-off events. For 11260/11350 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 30096 event pairs, 91 based on Foata normal form. 2/3018 useless extension candidates. Maximal degree in co-relation 6806. Up to 356 conditions per place. [2022-07-22 21:41:01,829 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 100 selfloop transitions, 17 changer transitions 7/418 dead transitions. [2022-07-22 21:41:01,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 418 transitions, 2676 flow [2022-07-22 21:41:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1565 transitions. [2022-07-22 21:41:01,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9178885630498533 [2022-07-22 21:41:01,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1565 transitions. [2022-07-22 21:41:01,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1565 transitions. [2022-07-22 21:41:01,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:01,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1565 transitions. [2022-07-22 21:41:01,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,834 INFO L186 Difference]: Start difference. First operand has 424 places, 385 transitions, 2053 flow. Second operand 5 states and 1565 transitions. [2022-07-22 21:41:01,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 418 transitions, 2676 flow [2022-07-22 21:41:01,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 418 transitions, 2621 flow, removed 27 selfloop flow, removed 2 redundant places. [2022-07-22 21:41:01,869 INFO L242 Difference]: Finished difference. Result has 427 places, 389 transitions, 2121 flow [2022-07-22 21:41:01,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2121, PETRI_PLACES=427, PETRI_TRANSITIONS=389} [2022-07-22 21:41:01,870 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 115 predicate places. [2022-07-22 21:41:01,870 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 389 transitions, 2121 flow [2022-07-22 21:41:01,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,870 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:01,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:01,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:41:01,870 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1935450147, now seen corresponding path program 4 times [2022-07-22 21:41:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:01,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087078425] [2022-07-22 21:41:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:01,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087078425] [2022-07-22 21:41:01,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087078425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:01,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:01,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:01,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684939698] [2022-07-22 21:41:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:01,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:01,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:01,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:01,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:01,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 389 transitions, 2121 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:01,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:01,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:01,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:02,381 INFO L129 PetriNetUnfolder]: 373/3120 cut-off events. [2022-07-22 21:41:02,381 INFO L130 PetriNetUnfolder]: For 11413/11506 co-relation queries the response was YES. [2022-07-22 21:41:02,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6733 conditions, 3120 events. 373/3120 cut-off events. For 11413/11506 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 28732 event pairs, 98 based on Foata normal form. 3/2907 useless extension candidates. Maximal degree in co-relation 6615. Up to 395 conditions per place. [2022-07-22 21:41:02,422 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 95 selfloop transitions, 15 changer transitions 10/414 dead transitions. [2022-07-22 21:41:02,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 414 transitions, 2630 flow [2022-07-22 21:41:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1563 transitions. [2022-07-22 21:41:02,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9167155425219942 [2022-07-22 21:41:02,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1563 transitions. [2022-07-22 21:41:02,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1563 transitions. [2022-07-22 21:41:02,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:02,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1563 transitions. [2022-07-22 21:41:02,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,427 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,427 INFO L186 Difference]: Start difference. First operand has 427 places, 389 transitions, 2121 flow. Second operand 5 states and 1563 transitions. [2022-07-22 21:41:02,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 414 transitions, 2630 flow [2022-07-22 21:41:02,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 414 transitions, 2583 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:02,467 INFO L242 Difference]: Finished difference. Result has 430 places, 390 transitions, 2146 flow [2022-07-22 21:41:02,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2146, PETRI_PLACES=430, PETRI_TRANSITIONS=390} [2022-07-22 21:41:02,467 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 118 predicate places. [2022-07-22 21:41:02,468 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 390 transitions, 2146 flow [2022-07-22 21:41:02,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:02,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:02,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:41:02,468 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:02,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1826864789, now seen corresponding path program 1 times [2022-07-22 21:41:02,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:02,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694196785] [2022-07-22 21:41:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:02,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:02,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694196785] [2022-07-22 21:41:02,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694196785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:02,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:02,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756319550] [2022-07-22 21:41:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:02,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:02,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:02,508 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:02,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 390 transitions, 2146 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:02,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:02,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:02,950 INFO L129 PetriNetUnfolder]: 409/3152 cut-off events. [2022-07-22 21:41:02,950 INFO L130 PetriNetUnfolder]: For 11198/11208 co-relation queries the response was YES. [2022-07-22 21:41:02,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 3152 events. 409/3152 cut-off events. For 11198/11208 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 29065 event pairs, 47 based on Foata normal form. 6/2947 useless extension candidates. Maximal degree in co-relation 6582. Up to 267 conditions per place. [2022-07-22 21:41:02,990 INFO L132 encePairwiseOnDemand]: 332/341 looper letters, 100 selfloop transitions, 28 changer transitions 16/438 dead transitions. [2022-07-22 21:41:02,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 438 transitions, 3134 flow [2022-07-22 21:41:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1572 transitions. [2022-07-22 21:41:02,991 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9219941348973607 [2022-07-22 21:41:02,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1572 transitions. [2022-07-22 21:41:02,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1572 transitions. [2022-07-22 21:41:02,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:02,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1572 transitions. [2022-07-22 21:41:02,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,995 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:02,995 INFO L186 Difference]: Start difference. First operand has 430 places, 390 transitions, 2146 flow. Second operand 5 states and 1572 transitions. [2022-07-22 21:41:02,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 438 transitions, 3134 flow [2022-07-22 21:41:03,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 438 transitions, 3124 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:03,041 INFO L242 Difference]: Finished difference. Result has 437 places, 393 transitions, 2307 flow [2022-07-22 21:41:03,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2307, PETRI_PLACES=437, PETRI_TRANSITIONS=393} [2022-07-22 21:41:03,041 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 125 predicate places. [2022-07-22 21:41:03,041 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 393 transitions, 2307 flow [2022-07-22 21:41:03,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:03,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 21:41:03,042 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1162103567, now seen corresponding path program 1 times [2022-07-22 21:41:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:03,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161389433] [2022-07-22 21:41:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:03,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:03,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:03,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161389433] [2022-07-22 21:41:03,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161389433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:03,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:03,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:03,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238786767] [2022-07-22 21:41:03,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:03,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:03,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:03,078 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:03,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 393 transitions, 2307 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:03,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:03,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:03,525 INFO L129 PetriNetUnfolder]: 349/2873 cut-off events. [2022-07-22 21:41:03,525 INFO L130 PetriNetUnfolder]: For 12337/12361 co-relation queries the response was YES. [2022-07-22 21:41:03,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6394 conditions, 2873 events. 349/2873 cut-off events. For 12337/12361 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 25845 event pairs, 30 based on Foata normal form. 12/2708 useless extension candidates. Maximal degree in co-relation 6098. Up to 224 conditions per place. [2022-07-22 21:41:03,558 INFO L132 encePairwiseOnDemand]: 332/341 looper letters, 124 selfloop transitions, 23 changer transitions 10/451 dead transitions. [2022-07-22 21:41:03,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 451 transitions, 3470 flow [2022-07-22 21:41:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1578 transitions. [2022-07-22 21:41:03,559 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9255131964809384 [2022-07-22 21:41:03,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1578 transitions. [2022-07-22 21:41:03,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1578 transitions. [2022-07-22 21:41:03,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:03,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1578 transitions. [2022-07-22 21:41:03,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,563 INFO L186 Difference]: Start difference. First operand has 437 places, 393 transitions, 2307 flow. Second operand 5 states and 1578 transitions. [2022-07-22 21:41:03,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 451 transitions, 3470 flow [2022-07-22 21:41:03,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 451 transitions, 3399 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-07-22 21:41:03,608 INFO L242 Difference]: Finished difference. Result has 441 places, 402 transitions, 2521 flow [2022-07-22 21:41:03,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2521, PETRI_PLACES=441, PETRI_TRANSITIONS=402} [2022-07-22 21:41:03,608 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 129 predicate places. [2022-07-22 21:41:03,609 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 402 transitions, 2521 flow [2022-07-22 21:41:03,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:03,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:03,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 21:41:03,609 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 174492589, now seen corresponding path program 2 times [2022-07-22 21:41:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068429018] [2022-07-22 21:41:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:03,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068429018] [2022-07-22 21:41:03,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068429018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:03,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:03,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663538368] [2022-07-22 21:41:03,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:03,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:03,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:03,646 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:03,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 402 transitions, 2521 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:03,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:03,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:03,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:04,113 INFO L129 PetriNetUnfolder]: 352/2987 cut-off events. [2022-07-22 21:41:04,114 INFO L130 PetriNetUnfolder]: For 13176/13250 co-relation queries the response was YES. [2022-07-22 21:41:04,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6505 conditions, 2987 events. 352/2987 cut-off events. For 13176/13250 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 27036 event pairs, 50 based on Foata normal form. 18/2805 useless extension candidates. Maximal degree in co-relation 6244. Up to 154 conditions per place. [2022-07-22 21:41:04,155 INFO L132 encePairwiseOnDemand]: 331/341 looper letters, 126 selfloop transitions, 34 changer transitions 6/460 dead transitions. [2022-07-22 21:41:04,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 460 transitions, 3641 flow [2022-07-22 21:41:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1579 transitions. [2022-07-22 21:41:04,157 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9260997067448681 [2022-07-22 21:41:04,157 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1579 transitions. [2022-07-22 21:41:04,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1579 transitions. [2022-07-22 21:41:04,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:04,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1579 transitions. [2022-07-22 21:41:04,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,160 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,160 INFO L186 Difference]: Start difference. First operand has 441 places, 402 transitions, 2521 flow. Second operand 5 states and 1579 transitions. [2022-07-22 21:41:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 460 transitions, 3641 flow [2022-07-22 21:41:04,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 460 transitions, 3591 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-07-22 21:41:04,204 INFO L242 Difference]: Finished difference. Result has 448 places, 416 transitions, 2911 flow [2022-07-22 21:41:04,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2911, PETRI_PLACES=448, PETRI_TRANSITIONS=416} [2022-07-22 21:41:04,205 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 136 predicate places. [2022-07-22 21:41:04,205 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 416 transitions, 2911 flow [2022-07-22 21:41:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:04,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:04,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 21:41:04,206 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1717862791, now seen corresponding path program 2 times [2022-07-22 21:41:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:04,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197837405] [2022-07-22 21:41:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:04,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:04,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197837405] [2022-07-22 21:41:04,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197837405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:04,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:04,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:41:04,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038873747] [2022-07-22 21:41:04,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:04,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:41:04,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:41:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:41:04,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 341 [2022-07-22 21:41:04,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 416 transitions, 2911 flow. Second operand has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:04,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 341 [2022-07-22 21:41:04,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:04,692 INFO L129 PetriNetUnfolder]: 359/2847 cut-off events. [2022-07-22 21:41:04,692 INFO L130 PetriNetUnfolder]: For 14000/14064 co-relation queries the response was YES. [2022-07-22 21:41:04,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6376 conditions, 2847 events. 359/2847 cut-off events. For 14000/14064 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 25808 event pairs, 41 based on Foata normal form. 11/2661 useless extension candidates. Maximal degree in co-relation 6152. Up to 193 conditions per place. [2022-07-22 21:41:04,732 INFO L132 encePairwiseOnDemand]: 331/341 looper letters, 116 selfloop transitions, 38 changer transitions 9/457 dead transitions. [2022-07-22 21:41:04,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 457 transitions, 3802 flow [2022-07-22 21:41:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:41:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:41:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1576 transitions. [2022-07-22 21:41:04,734 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9243401759530792 [2022-07-22 21:41:04,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1576 transitions. [2022-07-22 21:41:04,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1576 transitions. [2022-07-22 21:41:04,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:04,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1576 transitions. [2022-07-22 21:41:04,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.2) internal successors, (1576), 5 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,737 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 341.0) internal successors, (2046), 6 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,737 INFO L186 Difference]: Start difference. First operand has 448 places, 416 transitions, 2911 flow. Second operand 5 states and 1576 transitions. [2022-07-22 21:41:04,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 457 transitions, 3802 flow [2022-07-22 21:41:04,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 457 transitions, 3732 flow, removed 35 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:04,785 INFO L242 Difference]: Finished difference. Result has 456 places, 422 transitions, 3122 flow [2022-07-22 21:41:04,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3122, PETRI_PLACES=456, PETRI_TRANSITIONS=422} [2022-07-22 21:41:04,785 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 144 predicate places. [2022-07-22 21:41:04,785 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 422 transitions, 3122 flow [2022-07-22 21:41:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:04,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 21:41:04,786 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash -572767587, now seen corresponding path program 1 times [2022-07-22 21:41:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:04,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752979345] [2022-07-22 21:41:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752979345] [2022-07-22 21:41:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752979345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:04,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:04,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:41:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508108863] [2022-07-22 21:41:04,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:04,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:41:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:41:04,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:41:04,852 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 341 [2022-07-22 21:41:04,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 422 transitions, 3122 flow. Second operand has 8 states, 8 states have (on average 307.25) internal successors, (2458), 8 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:04,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:04,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 341 [2022-07-22 21:41:04,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:05,436 INFO L129 PetriNetUnfolder]: 262/2736 cut-off events. [2022-07-22 21:41:05,436 INFO L130 PetriNetUnfolder]: For 9826/10157 co-relation queries the response was YES. [2022-07-22 21:41:05,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5557 conditions, 2736 events. 262/2736 cut-off events. For 9826/10157 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 25531 event pairs, 62 based on Foata normal form. 75/2652 useless extension candidates. Maximal degree in co-relation 5355. Up to 317 conditions per place. [2022-07-22 21:41:05,483 INFO L132 encePairwiseOnDemand]: 331/341 looper letters, 35 selfloop transitions, 7 changer transitions 4/448 dead transitions. [2022-07-22 21:41:05,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 448 transitions, 3287 flow [2022-07-22 21:41:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:41:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:41:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3402 transitions. [2022-07-22 21:41:05,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9069581444948014 [2022-07-22 21:41:05,486 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3402 transitions. [2022-07-22 21:41:05,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3402 transitions. [2022-07-22 21:41:05,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:05,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3402 transitions. [2022-07-22 21:41:05,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 309.27272727272725) internal successors, (3402), 11 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:05,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 341.0) internal successors, (4092), 12 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:05,492 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 341.0) internal successors, (4092), 12 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:05,492 INFO L186 Difference]: Start difference. First operand has 456 places, 422 transitions, 3122 flow. Second operand 11 states and 3402 transitions. [2022-07-22 21:41:05,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 448 transitions, 3287 flow [2022-07-22 21:41:05,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 448 transitions, 3243 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-07-22 21:41:05,538 INFO L242 Difference]: Finished difference. Result has 475 places, 428 transitions, 3135 flow [2022-07-22 21:41:05,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3135, PETRI_PLACES=475, PETRI_TRANSITIONS=428} [2022-07-22 21:41:05,538 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 163 predicate places. [2022-07-22 21:41:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 428 transitions, 3135 flow [2022-07-22 21:41:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 307.25) internal successors, (2458), 8 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:05,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:05,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 21:41:05,539 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1431441212, now seen corresponding path program 1 times [2022-07-22 21:41:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:05,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787121934] [2022-07-22 21:41:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:05,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:05,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787121934] [2022-07-22 21:41:05,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787121934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:05,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:05,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:41:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149391322] [2022-07-22 21:41:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:41:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:41:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:41:05,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 341 [2022-07-22 21:41:05,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 428 transitions, 3135 flow. Second operand has 9 states, 9 states have (on average 304.22222222222223) internal successors, (2738), 9 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:05,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:05,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 341 [2022-07-22 21:41:05,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:06,477 INFO L129 PetriNetUnfolder]: 384/4303 cut-off events. [2022-07-22 21:41:06,478 INFO L130 PetriNetUnfolder]: For 12439/12863 co-relation queries the response was YES. [2022-07-22 21:41:06,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8745 conditions, 4303 events. 384/4303 cut-off events. For 12439/12863 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 44117 event pairs, 63 based on Foata normal form. 44/4097 useless extension candidates. Maximal degree in co-relation 8652. Up to 420 conditions per place. [2022-07-22 21:41:06,552 INFO L132 encePairwiseOnDemand]: 328/341 looper letters, 38 selfloop transitions, 11 changer transitions 4/452 dead transitions. [2022-07-22 21:41:06,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 452 transitions, 3322 flow [2022-07-22 21:41:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:41:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:41:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2766 transitions. [2022-07-22 21:41:06,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9012707722385142 [2022-07-22 21:41:06,554 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2766 transitions. [2022-07-22 21:41:06,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2766 transitions. [2022-07-22 21:41:06,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:06,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2766 transitions. [2022-07-22 21:41:06,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 307.3333333333333) internal successors, (2766), 9 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:06,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:06,559 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:06,559 INFO L186 Difference]: Start difference. First operand has 475 places, 428 transitions, 3135 flow. Second operand 9 states and 2766 transitions. [2022-07-22 21:41:06,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 452 transitions, 3322 flow [2022-07-22 21:41:06,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 452 transitions, 3313 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:06,614 INFO L242 Difference]: Finished difference. Result has 485 places, 436 transitions, 3219 flow [2022-07-22 21:41:06,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=485, PETRI_TRANSITIONS=436} [2022-07-22 21:41:06,615 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 173 predicate places. [2022-07-22 21:41:06,615 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 436 transitions, 3219 flow [2022-07-22 21:41:06,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 304.22222222222223) internal successors, (2738), 9 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:06,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:06,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:06,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 21:41:06,616 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash -726637368, now seen corresponding path program 1 times [2022-07-22 21:41:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:06,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47899252] [2022-07-22 21:41:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47899252] [2022-07-22 21:41:06,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47899252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:06,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:06,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:41:06,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377154029] [2022-07-22 21:41:06,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:06,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:41:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:41:06,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:41:06,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 341 [2022-07-22 21:41:06,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 436 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 303.44444444444446) internal successors, (2731), 9 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:06,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:06,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 341 [2022-07-22 21:41:06,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:41:08,943 INFO L129 PetriNetUnfolder]: 2838/11655 cut-off events. [2022-07-22 21:41:08,943 INFO L130 PetriNetUnfolder]: For 20102/21776 co-relation queries the response was YES. [2022-07-22 21:41:09,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26409 conditions, 11655 events. 2838/11655 cut-off events. For 20102/21776 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 136338 event pairs, 1401 based on Foata normal form. 323/11017 useless extension candidates. Maximal degree in co-relation 26311. Up to 2752 conditions per place. [2022-07-22 21:41:09,138 INFO L132 encePairwiseOnDemand]: 328/341 looper letters, 88 selfloop transitions, 12 changer transitions 4/510 dead transitions. [2022-07-22 21:41:09,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 510 transitions, 3799 flow [2022-07-22 21:41:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:41:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:41:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4291 transitions. [2022-07-22 21:41:09,141 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8988269794721407 [2022-07-22 21:41:09,141 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4291 transitions. [2022-07-22 21:41:09,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4291 transitions. [2022-07-22 21:41:09,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:41:09,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4291 transitions. [2022-07-22 21:41:09,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 306.5) internal successors, (4291), 14 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:09,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 341.0) internal successors, (5115), 15 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:09,148 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 341.0) internal successors, (5115), 15 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:09,148 INFO L186 Difference]: Start difference. First operand has 485 places, 436 transitions, 3219 flow. Second operand 14 states and 4291 transitions. [2022-07-22 21:41:09,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 510 transitions, 3799 flow [2022-07-22 21:41:09,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 510 transitions, 3742 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-22 21:41:09,267 INFO L242 Difference]: Finished difference. Result has 502 places, 442 transitions, 3272 flow [2022-07-22 21:41:09,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3272, PETRI_PLACES=502, PETRI_TRANSITIONS=442} [2022-07-22 21:41:09,268 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 190 predicate places. [2022-07-22 21:41:09,268 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 442 transitions, 3272 flow [2022-07-22 21:41:09,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 303.44444444444446) internal successors, (2731), 9 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:09,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:41:09,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:41:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 21:41:09,269 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:41:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:41:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1749819503, now seen corresponding path program 1 times [2022-07-22 21:41:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:41:09,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702084341] [2022-07-22 21:41:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:41:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:41:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:41:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:41:09,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:41:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702084341] [2022-07-22 21:41:09,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702084341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:41:09,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:41:09,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-07-22 21:41:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943891409] [2022-07-22 21:41:09,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:41:09,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 21:41:09,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:41:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 21:41:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 21:41:09,892 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 341 [2022-07-22 21:41:09,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 442 transitions, 3272 flow. Second operand has 40 states, 40 states have (on average 227.375) internal successors, (9095), 40 states have internal predecessors, (9095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:41:09,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:41:09,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 341 [2022-07-22 21:41:09,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand