./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-symm.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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:16:58,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:16:58,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:16:58,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:16:58,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:16:58,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:16:58,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:16:58,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:16:58,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:16:58,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:16:58,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:16:58,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:16:58,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:16:58,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:16:58,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:16:58,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:16:58,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:16:58,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:16:58,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:16:58,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:16:58,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:16:58,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:16:58,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:16:58,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:16:58,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:16:58,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:16:58,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:16:58,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:16:58,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:16:58,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:16:58,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:16:58,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:16:58,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:16:58,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:16:58,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:16:58,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:16:58,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:16:58,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:16:58,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:16:58,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:16:58,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:16:58,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:16:58,211 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:16:58,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:16:58,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:16:58,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:16:58,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:16:58,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:16:58,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:16:58,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:16:58,214 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:16:58,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:16:58,215 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:16:58,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:16:58,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:16:58,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:16:58,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:16:58,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:16:58,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:16:58,216 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:16:58,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:16:58,216 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:16:58,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:16:58,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:16:58,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:16:58,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:16:58,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:16:58,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:16:58,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:16:58,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:16:58,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:16:58,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:16:58,218 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:16:58,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:16:58,218 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:16:58,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:16:58,219 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:16:58,219 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:16:58,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:16:58,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:16:58,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:16:58,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:16:58,474 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:16:58,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-31 01:16:59,411 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:16:59,607 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:16:59,607 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-31 01:16:59,642 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06ebf99ab/870990a101be41f9bf6691a715a963ba/FLAGf58724b9f [2023-08-31 01:16:59,654 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06ebf99ab/870990a101be41f9bf6691a715a963ba [2023-08-31 01:16:59,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:16:59,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:16:59,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:16:59,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:16:59,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:16:59,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e321490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59, skipping insertion in model container [2023-08-31 01:16:59,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:16:59,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:16:59,836 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-08-31 01:16:59,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:16:59,861 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:16:59,875 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c[3305,3318] [2023-08-31 01:16:59,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:16:59,889 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:16:59,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59 WrapperNode [2023-08-31 01:16:59,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:16:59,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:16:59,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:16:59,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:16:59,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,944 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 294 [2023-08-31 01:16:59,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:16:59,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:16:59,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:16:59,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:16:59,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,983 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:16:59,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:16:59,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:16:59,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:16:59,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (1/1) ... [2023-08-31 01:16:59,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:17:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:17:00,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:17:00,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:17:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:17:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:17:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:17:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:17:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:17:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:17:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:17:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:17:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:17:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:17:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:17:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:17:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:17:00,085 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:17:00,158 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:17:00,160 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:17:00,464 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:17:00,472 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:17:00,473 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 01:17:00,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:17:00 BoogieIcfgContainer [2023-08-31 01:17:00,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:17:00,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:17:00,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:17:00,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:17:00,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:16:59" (1/3) ... [2023-08-31 01:17:00,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0d41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:17:00, skipping insertion in model container [2023-08-31 01:17:00,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:16:59" (2/3) ... [2023-08-31 01:17:00,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0d41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:17:00, skipping insertion in model container [2023-08-31 01:17:00,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:17:00" (3/3) ... [2023-08-31 01:17:00,480 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-08-31 01:17:00,485 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:17:00,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:17:00,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:17:00,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:17:00,618 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 01:17:00,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 322 places, 343 transitions, 702 flow [2023-08-31 01:17:00,795 INFO L130 PetriNetUnfolder]: 28/341 cut-off events. [2023-08-31 01:17:00,795 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:17:00,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 341 events. 28/341 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 339 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 270. Up to 2 conditions per place. [2023-08-31 01:17:00,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 343 transitions, 702 flow [2023-08-31 01:17:00,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 333 transitions, 678 flow [2023-08-31 01:17:00,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:17:00,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 312 places, 333 transitions, 678 flow [2023-08-31 01:17:00,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 312 places, 333 transitions, 678 flow [2023-08-31 01:17:00,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 333 transitions, 678 flow [2023-08-31 01:17:00,878 INFO L130 PetriNetUnfolder]: 28/333 cut-off events. [2023-08-31 01:17:00,878 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:17:00,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 333 events. 28/333 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 338 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 270. Up to 2 conditions per place. [2023-08-31 01:17:00,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 6048 [2023-08-31 01:17:10,334 INFO L134 LiptonReduction]: Checked pairs total: 6391 [2023-08-31 01:17:10,334 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-08-31 01:17:10,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:17:10,347 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f9848fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:17:10,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 01:17:10,352 INFO L130 PetriNetUnfolder]: 5/24 cut-off events. [2023-08-31 01:17:10,352 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:17:10,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:10,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:10,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:10,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash 432883374, now seen corresponding path program 1 times [2023-08-31 01:17:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:10,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549569378] [2023-08-31 01:17:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:17:10,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:10,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549569378] [2023-08-31 01:17:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549569378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:10,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:10,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:17:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071765749] [2023-08-31 01:17:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:10,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:17:10,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:17:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:17:10,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 736 [2023-08-31 01:17:10,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:10,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 736 [2023-08-31 01:17:10,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:10,895 INFO L130 PetriNetUnfolder]: 49/103 cut-off events. [2023-08-31 01:17:10,895 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 01:17:10,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 103 events. 49/103 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 182. Up to 103 conditions per place. [2023-08-31 01:17:10,898 INFO L137 encePairwiseOnDemand]: 733/736 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-31 01:17:10,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 116 flow [2023-08-31 01:17:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:17:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:17:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-08-31 01:17:10,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43342391304347827 [2023-08-31 01:17:10,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-08-31 01:17:10,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-08-31 01:17:10,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:10,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-08-31 01:17:10,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 736.0) internal successors, (2944), 4 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 736.0) internal successors, (2944), 4 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,947 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 3 states and 957 transitions. [2023-08-31 01:17:10,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 116 flow [2023-08-31 01:17:10,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 01:17:10,951 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 66 flow [2023-08-31 01:17:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2023-08-31 01:17:10,954 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-08-31 01:17:10,955 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 66 flow [2023-08-31 01:17:10,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:10,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:10,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:10,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:17:10,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:10,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash 855870377, now seen corresponding path program 1 times [2023-08-31 01:17:10,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:10,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648757610] [2023-08-31 01:17:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:17:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648757610] [2023-08-31 01:17:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648757610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:11,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:17:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068606770] [2023-08-31 01:17:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:11,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:17:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:17:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:17:11,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 736 [2023-08-31 01:17:11,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:11,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 736 [2023-08-31 01:17:11,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:11,212 INFO L130 PetriNetUnfolder]: 49/104 cut-off events. [2023-08-31 01:17:11,212 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 01:17:11,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 104 events. 49/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 214. Up to 102 conditions per place. [2023-08-31 01:17:11,213 INFO L137 encePairwiseOnDemand]: 731/736 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-31 01:17:11,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 122 flow [2023-08-31 01:17:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:17:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:17:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1260 transitions. [2023-08-31 01:17:11,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279891304347826 [2023-08-31 01:17:11,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1260 transitions. [2023-08-31 01:17:11,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1260 transitions. [2023-08-31 01:17:11,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:11,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1260 transitions. [2023-08-31 01:17:11,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,223 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,223 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 66 flow. Second operand 4 states and 1260 transitions. [2023-08-31 01:17:11,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 122 flow [2023-08-31 01:17:11,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 118 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:17:11,224 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 80 flow [2023-08-31 01:17:11,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-31 01:17:11,224 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-31 01:17:11,225 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 80 flow [2023-08-31 01:17:11,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 312.75) internal successors, (1251), 4 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:11,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:17:11,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:11,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1025184123, now seen corresponding path program 1 times [2023-08-31 01:17:11,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:11,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484520791] [2023-08-31 01:17:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:11,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:17:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484520791] [2023-08-31 01:17:11,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484520791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:11,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:11,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:17:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675166687] [2023-08-31 01:17:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:11,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:17:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:17:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:17:11,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 736 [2023-08-31 01:17:11,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:11,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 736 [2023-08-31 01:17:11,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:11,439 INFO L130 PetriNetUnfolder]: 49/105 cut-off events. [2023-08-31 01:17:11,439 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 01:17:11,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 105 events. 49/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 214. Up to 104 conditions per place. [2023-08-31 01:17:11,440 INFO L137 encePairwiseOnDemand]: 732/736 looper letters, 25 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2023-08-31 01:17:11,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 138 flow [2023-08-31 01:17:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:17:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:17:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1259 transitions. [2023-08-31 01:17:11,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42764945652173914 [2023-08-31 01:17:11,443 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1259 transitions. [2023-08-31 01:17:11,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1259 transitions. [2023-08-31 01:17:11,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:11,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1259 transitions. [2023-08-31 01:17:11,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.75) internal successors, (1259), 4 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,449 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,449 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 80 flow. Second operand 4 states and 1259 transitions. [2023-08-31 01:17:11,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 138 flow [2023-08-31 01:17:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:17:11,451 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 93 flow [2023-08-31 01:17:11,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-31 01:17:11,451 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-31 01:17:11,451 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 93 flow [2023-08-31 01:17:11,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:11,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:17:11,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:17:11,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:11,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2006272341, now seen corresponding path program 1 times [2023-08-31 01:17:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:11,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795465294] [2023-08-31 01:17:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:11,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:17:11,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:11,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795465294] [2023-08-31 01:17:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795465294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:11,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:11,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:17:11,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355419665] [2023-08-31 01:17:11,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:11,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:17:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:17:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:17:11,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 736 [2023-08-31 01:17:11,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:11,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 736 [2023-08-31 01:17:11,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:11,643 INFO L130 PetriNetUnfolder]: 49/106 cut-off events. [2023-08-31 01:17:11,644 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 01:17:11,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 106 events. 49/106 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 39 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 221. Up to 105 conditions per place. [2023-08-31 01:17:11,644 INFO L137 encePairwiseOnDemand]: 732/736 looper letters, 26 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-08-31 01:17:11,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 153 flow [2023-08-31 01:17:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:17:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:17:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1259 transitions. [2023-08-31 01:17:11,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42764945652173914 [2023-08-31 01:17:11,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1259 transitions. [2023-08-31 01:17:11,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1259 transitions. [2023-08-31 01:17:11,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:11,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1259 transitions. [2023-08-31 01:17:11,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.75) internal successors, (1259), 4 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 736.0) internal successors, (3680), 5 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,655 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 93 flow. Second operand 4 states and 1259 transitions. [2023-08-31 01:17:11,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 153 flow [2023-08-31 01:17:11,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 147 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 01:17:11,656 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 101 flow [2023-08-31 01:17:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-31 01:17:11,657 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-08-31 01:17:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 101 flow [2023-08-31 01:17:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:11,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:11,658 INFO L208 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] [2023-08-31 01:17:11,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:17:11,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:11,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1187833151, now seen corresponding path program 1 times [2023-08-31 01:17:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:11,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486522457] [2023-08-31 01:17:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:11,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:12,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:12,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486522457] [2023-08-31 01:17:12,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486522457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:12,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:12,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 01:17:12,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2838523] [2023-08-31 01:17:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:12,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:17:12,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:17:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:17:13,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-31 01:17:13,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 101 flow. Second operand has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:13,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:13,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-31 01:17:13,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:13,751 INFO L130 PetriNetUnfolder]: 83/192 cut-off events. [2023-08-31 01:17:13,752 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-31 01:17:13,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 192 events. 83/192 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 724 event pairs, 8 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 402. Up to 84 conditions per place. [2023-08-31 01:17:13,752 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 50 selfloop transitions, 14 changer transitions 5/69 dead transitions. [2023-08-31 01:17:13,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 330 flow [2023-08-31 01:17:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:17:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:17:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2806 transitions. [2023-08-31 01:17:13,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2023-08-31 01:17:13,757 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2806 transitions. [2023-08-31 01:17:13,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2806 transitions. [2023-08-31 01:17:13,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:13,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2806 transitions. [2023-08-31 01:17:13,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 280.6) internal successors, (2806), 10 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:13,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:13,769 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:13,769 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 101 flow. Second operand 10 states and 2806 transitions. [2023-08-31 01:17:13,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 330 flow [2023-08-31 01:17:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 324 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 01:17:13,771 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 177 flow [2023-08-31 01:17:13,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=177, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-31 01:17:13,771 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2023-08-31 01:17:13,771 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 177 flow [2023-08-31 01:17:13,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:13,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:13,772 INFO L208 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] [2023-08-31 01:17:13,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 01:17:13,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:13,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1223626605, now seen corresponding path program 2 times [2023-08-31 01:17:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:13,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454002950] [2023-08-31 01:17:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:14,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454002950] [2023-08-31 01:17:14,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454002950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:14,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:14,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:17:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565642198] [2023-08-31 01:17:14,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:17:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:17:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:17:15,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 736 [2023-08-31 01:17:15,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 177 flow. Second operand has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:15,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:15,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 736 [2023-08-31 01:17:15,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:15,818 INFO L130 PetriNetUnfolder]: 88/215 cut-off events. [2023-08-31 01:17:15,818 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-08-31 01:17:15,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 215 events. 88/215 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 826 event pairs, 16 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 634. Up to 88 conditions per place. [2023-08-31 01:17:15,820 INFO L137 encePairwiseOnDemand]: 727/736 looper letters, 53 selfloop transitions, 18 changer transitions 5/76 dead transitions. [2023-08-31 01:17:15,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 460 flow [2023-08-31 01:17:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2589 transitions. [2023-08-31 01:17:15,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908514492753623 [2023-08-31 01:17:15,825 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2589 transitions. [2023-08-31 01:17:15,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2589 transitions. [2023-08-31 01:17:15,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:15,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2589 transitions. [2023-08-31 01:17:15,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 287.6666666666667) internal successors, (2589), 9 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:15,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:15,837 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:15,838 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 177 flow. Second operand 9 states and 2589 transitions. [2023-08-31 01:17:15,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 460 flow [2023-08-31 01:17:15,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 01:17:15,843 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 297 flow [2023-08-31 01:17:15,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=297, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-31 01:17:15,847 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-08-31 01:17:15,847 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 297 flow [2023-08-31 01:17:15,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:15,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:15,849 INFO L208 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] [2023-08-31 01:17:15,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 01:17:15,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:15,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash -12608099, now seen corresponding path program 3 times [2023-08-31 01:17:15,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927018622] [2023-08-31 01:17:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:16,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927018622] [2023-08-31 01:17:16,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927018622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:16,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:16,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:17:16,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098275277] [2023-08-31 01:17:16,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:16,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:17:16,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:17:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:17:16,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 736 [2023-08-31 01:17:16,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:16,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:16,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 736 [2023-08-31 01:17:16,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:17,043 INFO L130 PetriNetUnfolder]: 127/319 cut-off events. [2023-08-31 01:17:17,044 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2023-08-31 01:17:17,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 319 events. 127/319 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1479 event pairs, 49 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1104. Up to 160 conditions per place. [2023-08-31 01:17:17,045 INFO L137 encePairwiseOnDemand]: 727/736 looper letters, 50 selfloop transitions, 31 changer transitions 5/86 dead transitions. [2023-08-31 01:17:17,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 643 flow [2023-08-31 01:17:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:17:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:17:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2310 transitions. [2023-08-31 01:17:17,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923233695652174 [2023-08-31 01:17:17,050 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2310 transitions. [2023-08-31 01:17:17,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2310 transitions. [2023-08-31 01:17:17,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:17,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2310 transitions. [2023-08-31 01:17:17,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 288.75) internal successors, (2310), 8 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,070 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,070 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 297 flow. Second operand 8 states and 2310 transitions. [2023-08-31 01:17:17,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 643 flow [2023-08-31 01:17:17,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 629 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-31 01:17:17,074 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 482 flow [2023-08-31 01:17:17,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=482, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-31 01:17:17,075 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2023-08-31 01:17:17,075 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 482 flow [2023-08-31 01:17:17,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 284.14285714285717) internal successors, (1989), 7 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:17,076 INFO L208 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] [2023-08-31 01:17:17,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:17:17,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:17,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:17,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1226252381, now seen corresponding path program 4 times [2023-08-31 01:17:17,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:17,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708528741] [2023-08-31 01:17:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:17,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:17,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:17,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708528741] [2023-08-31 01:17:17,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708528741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:17,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:17,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:17:17,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088013975] [2023-08-31 01:17:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:17,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:17:17,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:17,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:17:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:17:17,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 736 [2023-08-31 01:17:17,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 482 flow. Second operand has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:17,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:17,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 736 [2023-08-31 01:17:17,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:18,205 INFO L130 PetriNetUnfolder]: 126/320 cut-off events. [2023-08-31 01:17:18,206 INFO L131 PetriNetUnfolder]: For 769/769 co-relation queries the response was YES. [2023-08-31 01:17:18,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 320 events. 126/320 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1513 event pairs, 37 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1258. Up to 178 conditions per place. [2023-08-31 01:17:18,207 INFO L137 encePairwiseOnDemand]: 729/736 looper letters, 77 selfloop transitions, 12 changer transitions 5/94 dead transitions. [2023-08-31 01:17:18,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 809 flow [2023-08-31 01:17:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:17:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:17:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2095 transitions. [2023-08-31 01:17:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40663819875776397 [2023-08-31 01:17:18,211 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2095 transitions. [2023-08-31 01:17:18,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2095 transitions. [2023-08-31 01:17:18,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:18,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2095 transitions. [2023-08-31 01:17:18,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 299.2857142857143) internal successors, (2095), 7 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,219 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,219 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 482 flow. Second operand 7 states and 2095 transitions. [2023-08-31 01:17:18,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 809 flow [2023-08-31 01:17:18,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 791 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 01:17:18,223 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 565 flow [2023-08-31 01:17:18,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=565, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2023-08-31 01:17:18,224 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-08-31 01:17:18,224 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 565 flow [2023-08-31 01:17:18,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:18,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:18,224 INFO L208 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] [2023-08-31 01:17:18,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:17:18,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:18,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:18,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1088873191, now seen corresponding path program 5 times [2023-08-31 01:17:18,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:18,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635665209] [2023-08-31 01:17:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:18,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:18,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635665209] [2023-08-31 01:17:18,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635665209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:18,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:18,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:17:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735697447] [2023-08-31 01:17:18,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:18,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:17:18,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:17:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:17:19,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 736 [2023-08-31 01:17:19,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 286.14285714285717) internal successors, (2003), 7 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:19,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:19,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 736 [2023-08-31 01:17:19,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:19,484 INFO L130 PetriNetUnfolder]: 125/313 cut-off events. [2023-08-31 01:17:19,485 INFO L131 PetriNetUnfolder]: For 1118/1118 co-relation queries the response was YES. [2023-08-31 01:17:19,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 313 events. 125/313 cut-off events. For 1118/1118 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1432 event pairs, 53 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1333. Up to 178 conditions per place. [2023-08-31 01:17:19,487 INFO L137 encePairwiseOnDemand]: 728/736 looper letters, 61 selfloop transitions, 19 changer transitions 9/89 dead transitions. [2023-08-31 01:17:19,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 833 flow [2023-08-31 01:17:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:17:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:17:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2039 transitions. [2023-08-31 01:17:19,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39576863354037267 [2023-08-31 01:17:19,492 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2039 transitions. [2023-08-31 01:17:19,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2039 transitions. [2023-08-31 01:17:19,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:19,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2039 transitions. [2023-08-31 01:17:19,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 291.2857142857143) internal successors, (2039), 7 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:19,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:19,500 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:19,501 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 565 flow. Second operand 7 states and 2039 transitions. [2023-08-31 01:17:19,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 833 flow [2023-08-31 01:17:19,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 818 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 01:17:19,509 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 639 flow [2023-08-31 01:17:19,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-08-31 01:17:19,510 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2023-08-31 01:17:19,510 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 639 flow [2023-08-31 01:17:19,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 286.14285714285717) internal successors, (2003), 7 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:19,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:19,511 INFO L208 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] [2023-08-31 01:17:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:17:19,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:19,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash 73416431, now seen corresponding path program 6 times [2023-08-31 01:17:19,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:19,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691409753] [2023-08-31 01:17:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:19,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691409753] [2023-08-31 01:17:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691409753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:20,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:20,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 01:17:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8712275] [2023-08-31 01:17:20,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:17:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:17:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:17:20,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-31 01:17:20,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 639 flow. Second operand has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:20,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:20,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-31 01:17:20,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:21,272 INFO L130 PetriNetUnfolder]: 126/320 cut-off events. [2023-08-31 01:17:21,272 INFO L131 PetriNetUnfolder]: For 1229/1229 co-relation queries the response was YES. [2023-08-31 01:17:21,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 320 events. 126/320 cut-off events. For 1229/1229 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1502 event pairs, 15 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1425. Up to 120 conditions per place. [2023-08-31 01:17:21,274 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 57 selfloop transitions, 33 changer transitions 5/95 dead transitions. [2023-08-31 01:17:21,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 948 flow [2023-08-31 01:17:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:17:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:17:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2797 transitions. [2023-08-31 01:17:21,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38002717391304347 [2023-08-31 01:17:21,279 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2797 transitions. [2023-08-31 01:17:21,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2797 transitions. [2023-08-31 01:17:21,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:21,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2797 transitions. [2023-08-31 01:17:21,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.7) internal successors, (2797), 10 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:21,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:21,289 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 736.0) internal successors, (8096), 11 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:21,290 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 639 flow. Second operand 10 states and 2797 transitions. [2023-08-31 01:17:21,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 948 flow [2023-08-31 01:17:21,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 915 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-31 01:17:21,295 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 779 flow [2023-08-31 01:17:21,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2023-08-31 01:17:21,297 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2023-08-31 01:17:21,297 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 779 flow [2023-08-31 01:17:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:21,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:21,298 INFO L208 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] [2023-08-31 01:17:21,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 01:17:21,298 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:21,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash 328223971, now seen corresponding path program 7 times [2023-08-31 01:17:21,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:21,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916198918] [2023-08-31 01:17:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:21,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:21,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916198918] [2023-08-31 01:17:21,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916198918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:21,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:21,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 01:17:21,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12087446] [2023-08-31 01:17:21,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:21,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:17:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:21,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:17:21,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:17:22,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-31 01:17:22,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 779 flow. Second operand has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:22,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:22,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-31 01:17:22,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:22,973 INFO L130 PetriNetUnfolder]: 125/313 cut-off events. [2023-08-31 01:17:22,973 INFO L131 PetriNetUnfolder]: For 1813/1813 co-relation queries the response was YES. [2023-08-31 01:17:22,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 313 events. 125/313 cut-off events. For 1813/1813 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1428 event pairs, 41 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1561. Up to 212 conditions per place. [2023-08-31 01:17:22,975 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 44 selfloop transitions, 39 changer transitions 5/88 dead transitions. [2023-08-31 01:17:22,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 1019 flow [2023-08-31 01:17:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2515 transitions. [2023-08-31 01:17:22,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37967995169082125 [2023-08-31 01:17:22,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2515 transitions. [2023-08-31 01:17:22,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2515 transitions. [2023-08-31 01:17:22,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:22,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2515 transitions. [2023-08-31 01:17:22,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.44444444444446) internal successors, (2515), 9 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:22,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:22,991 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:22,992 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 779 flow. Second operand 9 states and 2515 transitions. [2023-08-31 01:17:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 1019 flow [2023-08-31 01:17:22,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 1001 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-31 01:17:22,999 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 905 flow [2023-08-31 01:17:22,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=905, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-31 01:17:23,000 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2023-08-31 01:17:23,000 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 905 flow [2023-08-31 01:17:23,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.2) internal successors, (2762), 10 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:23,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:23,001 INFO L208 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] [2023-08-31 01:17:23,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 01:17:23,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:23,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1402950657, now seen corresponding path program 8 times [2023-08-31 01:17:23,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764756322] [2023-08-31 01:17:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:23,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:23,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764756322] [2023-08-31 01:17:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764756322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:23,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 01:17:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885752178] [2023-08-31 01:17:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:17:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:17:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:17:24,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-31 01:17:24,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 905 flow. Second operand has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:24,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:24,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-31 01:17:24,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:24,886 INFO L130 PetriNetUnfolder]: 149/375 cut-off events. [2023-08-31 01:17:24,886 INFO L131 PetriNetUnfolder]: For 2815/2815 co-relation queries the response was YES. [2023-08-31 01:17:24,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 375 events. 149/375 cut-off events. For 2815/2815 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1891 event pairs, 11 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 2009. Up to 122 conditions per place. [2023-08-31 01:17:24,889 INFO L137 encePairwiseOnDemand]: 726/736 looper letters, 59 selfloop transitions, 46 changer transitions 5/110 dead transitions. [2023-08-31 01:17:24,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 110 transitions, 1344 flow [2023-08-31 01:17:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2531 transitions. [2023-08-31 01:17:24,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3820954106280193 [2023-08-31 01:17:24,895 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2531 transitions. [2023-08-31 01:17:24,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2531 transitions. [2023-08-31 01:17:24,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:24,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2531 transitions. [2023-08-31 01:17:24,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.22222222222223) internal successors, (2531), 9 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:24,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:24,904 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:24,904 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 905 flow. Second operand 9 states and 2531 transitions. [2023-08-31 01:17:24,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 110 transitions, 1344 flow [2023-08-31 01:17:24,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 110 transitions, 1287 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-31 01:17:24,915 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 1121 flow [2023-08-31 01:17:24,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1121, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2023-08-31 01:17:24,916 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 72 predicate places. [2023-08-31 01:17:24,917 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 1121 flow [2023-08-31 01:17:24,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:24,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:24,918 INFO L208 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] [2023-08-31 01:17:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 01:17:24,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:24,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1906425293, now seen corresponding path program 9 times [2023-08-31 01:17:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445272189] [2023-08-31 01:17:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:25,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:25,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445272189] [2023-08-31 01:17:25,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445272189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:25,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:25,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 01:17:25,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070080783] [2023-08-31 01:17:25,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:25,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:17:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:17:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:17:26,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 736 [2023-08-31 01:17:26,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 1121 flow. Second operand has 10 states, 10 states have (on average 278.2) internal successors, (2782), 10 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:26,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:26,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 736 [2023-08-31 01:17:26,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:26,505 INFO L130 PetriNetUnfolder]: 148/368 cut-off events. [2023-08-31 01:17:26,505 INFO L131 PetriNetUnfolder]: For 3810/3810 co-relation queries the response was YES. [2023-08-31 01:17:26,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 368 events. 148/368 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1830 event pairs, 38 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 2174. Up to 196 conditions per place. [2023-08-31 01:17:26,508 INFO L137 encePairwiseOnDemand]: 726/736 looper letters, 62 selfloop transitions, 28 changer transitions 10/100 dead transitions. [2023-08-31 01:17:26,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 1391 flow [2023-08-31 01:17:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2537 transitions. [2023-08-31 01:17:26,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3830012077294686 [2023-08-31 01:17:26,512 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2537 transitions. [2023-08-31 01:17:26,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2537 transitions. [2023-08-31 01:17:26,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:26,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2537 transitions. [2023-08-31 01:17:26,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.8888888888889) internal successors, (2537), 9 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:26,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:26,521 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:26,521 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 1121 flow. Second operand 9 states and 2537 transitions. [2023-08-31 01:17:26,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 1391 flow [2023-08-31 01:17:26,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 1368 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-31 01:17:26,542 INFO L231 Difference]: Finished difference. Result has 105 places, 83 transitions, 1179 flow [2023-08-31 01:17:26,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1179, PETRI_PLACES=105, PETRI_TRANSITIONS=83} [2023-08-31 01:17:26,543 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2023-08-31 01:17:26,543 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 83 transitions, 1179 flow [2023-08-31 01:17:26,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 278.2) internal successors, (2782), 10 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:26,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:26,544 INFO L208 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] [2023-08-31 01:17:26,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 01:17:26,544 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:26,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1423168621, now seen corresponding path program 10 times [2023-08-31 01:17:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284379980] [2023-08-31 01:17:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:26,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284379980] [2023-08-31 01:17:27,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284379980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:27,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:27,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 01:17:27,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353618474] [2023-08-31 01:17:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:27,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:17:27,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:17:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:17:28,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-31 01:17:28,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 83 transitions, 1179 flow. Second operand has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:28,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:28,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-31 01:17:28,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:28,390 INFO L130 PetriNetUnfolder]: 143/352 cut-off events. [2023-08-31 01:17:28,391 INFO L131 PetriNetUnfolder]: For 3798/3798 co-relation queries the response was YES. [2023-08-31 01:17:28,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 352 events. 143/352 cut-off events. For 3798/3798 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1696 event pairs, 40 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 2169. Up to 229 conditions per place. [2023-08-31 01:17:28,393 INFO L137 encePairwiseOnDemand]: 726/736 looper letters, 48 selfloop transitions, 45 changer transitions 5/98 dead transitions. [2023-08-31 01:17:28,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 98 transitions, 1445 flow [2023-08-31 01:17:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:17:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:17:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2240 transitions. [2023-08-31 01:17:28,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2023-08-31 01:17:28,398 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2240 transitions. [2023-08-31 01:17:28,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2240 transitions. [2023-08-31 01:17:28,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:28,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2240 transitions. [2023-08-31 01:17:28,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 280.0) internal successors, (2240), 8 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:28,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:28,407 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:28,407 INFO L175 Difference]: Start difference. First operand has 105 places, 83 transitions, 1179 flow. Second operand 8 states and 2240 transitions. [2023-08-31 01:17:28,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 98 transitions, 1445 flow [2023-08-31 01:17:28,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 1375 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-31 01:17:28,421 INFO L231 Difference]: Finished difference. Result has 105 places, 85 transitions, 1276 flow [2023-08-31 01:17:28,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1276, PETRI_PLACES=105, PETRI_TRANSITIONS=85} [2023-08-31 01:17:28,422 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2023-08-31 01:17:28,422 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 85 transitions, 1276 flow [2023-08-31 01:17:28,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:28,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:28,423 INFO L208 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] [2023-08-31 01:17:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 01:17:28,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:28,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1807068179, now seen corresponding path program 11 times [2023-08-31 01:17:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294253308] [2023-08-31 01:17:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294253308] [2023-08-31 01:17:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294253308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 01:17:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483834762] [2023-08-31 01:17:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:29,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:17:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:17:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:17:29,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 736 [2023-08-31 01:17:29,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 85 transitions, 1276 flow. Second operand has 11 states, 11 states have (on average 285.0) internal successors, (3135), 11 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:29,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:29,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 736 [2023-08-31 01:17:29,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:30,085 INFO L130 PetriNetUnfolder]: 143/362 cut-off events. [2023-08-31 01:17:30,086 INFO L131 PetriNetUnfolder]: For 4462/4462 co-relation queries the response was YES. [2023-08-31 01:17:30,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 362 events. 143/362 cut-off events. For 4462/4462 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1787 event pairs, 22 based on Foata normal form. 2/363 useless extension candidates. Maximal degree in co-relation 2310. Up to 246 conditions per place. [2023-08-31 01:17:30,088 INFO L137 encePairwiseOnDemand]: 729/736 looper letters, 79 selfloop transitions, 18 changer transitions 9/106 dead transitions. [2023-08-31 01:17:30,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 1614 flow [2023-08-31 01:17:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:17:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:17:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2314 transitions. [2023-08-31 01:17:30,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930027173913043 [2023-08-31 01:17:30,091 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2314 transitions. [2023-08-31 01:17:30,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2314 transitions. [2023-08-31 01:17:30,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:30,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2314 transitions. [2023-08-31 01:17:30,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 289.25) internal successors, (2314), 8 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:30,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:30,098 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 736.0) internal successors, (6624), 9 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:30,098 INFO L175 Difference]: Start difference. First operand has 105 places, 85 transitions, 1276 flow. Second operand 8 states and 2314 transitions. [2023-08-31 01:17:30,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 1614 flow [2023-08-31 01:17:30,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 1513 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-31 01:17:30,112 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 1194 flow [2023-08-31 01:17:30,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1194, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2023-08-31 01:17:30,113 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 80 predicate places. [2023-08-31 01:17:30,113 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 1194 flow [2023-08-31 01:17:30,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 285.0) internal successors, (3135), 11 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:30,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:30,114 INFO L208 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] [2023-08-31 01:17:30,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 01:17:30,114 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:30,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1455020015, now seen corresponding path program 12 times [2023-08-31 01:17:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:30,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106161773] [2023-08-31 01:17:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:30,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106161773] [2023-08-31 01:17:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106161773] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:30,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:30,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 01:17:30,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299286846] [2023-08-31 01:17:30,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:17:30,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:17:30,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:17:31,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 736 [2023-08-31 01:17:31,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 1194 flow. Second operand has 12 states, 12 states have (on average 271.8333333333333) internal successors, (3262), 12 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:31,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:31,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 736 [2023-08-31 01:17:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:32,078 INFO L130 PetriNetUnfolder]: 134/336 cut-off events. [2023-08-31 01:17:32,078 INFO L131 PetriNetUnfolder]: For 3865/3865 co-relation queries the response was YES. [2023-08-31 01:17:32,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 336 events. 134/336 cut-off events. For 3865/3865 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1582 event pairs, 13 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 2100. Up to 94 conditions per place. [2023-08-31 01:17:32,081 INFO L137 encePairwiseOnDemand]: 725/736 looper letters, 46 selfloop transitions, 47 changer transitions 8/101 dead transitions. [2023-08-31 01:17:32,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 101 transitions, 1475 flow [2023-08-31 01:17:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2482 transitions. [2023-08-31 01:17:32,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37469806763285024 [2023-08-31 01:17:32,086 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2482 transitions. [2023-08-31 01:17:32,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2482 transitions. [2023-08-31 01:17:32,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:32,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2482 transitions. [2023-08-31 01:17:32,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.77777777777777) internal successors, (2482), 9 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:32,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:32,097 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:32,097 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 1194 flow. Second operand 9 states and 2482 transitions. [2023-08-31 01:17:32,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 101 transitions, 1475 flow [2023-08-31 01:17:32,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 101 transitions, 1378 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-31 01:17:32,109 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 1234 flow [2023-08-31 01:17:32,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2023-08-31 01:17:32,111 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 77 predicate places. [2023-08-31 01:17:32,111 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 1234 flow [2023-08-31 01:17:32,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 271.8333333333333) internal successors, (3262), 12 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:32,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:32,112 INFO L208 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] [2023-08-31 01:17:32,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 01:17:32,112 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:32,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1783573119, now seen corresponding path program 1 times [2023-08-31 01:17:32,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:32,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792551570] [2023-08-31 01:17:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:32,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:32,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:32,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792551570] [2023-08-31 01:17:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792551570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:32,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:17:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503068964] [2023-08-31 01:17:32,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:32,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:17:32,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:32,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:17:32,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:17:32,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 736 [2023-08-31 01:17:32,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 1234 flow. Second operand has 7 states, 7 states have (on average 290.42857142857144) internal successors, (2033), 7 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:32,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:32,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 736 [2023-08-31 01:17:32,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:33,015 INFO L130 PetriNetUnfolder]: 129/337 cut-off events. [2023-08-31 01:17:33,016 INFO L131 PetriNetUnfolder]: For 4233/4233 co-relation queries the response was YES. [2023-08-31 01:17:33,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 337 events. 129/337 cut-off events. For 4233/4233 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1625 event pairs, 27 based on Foata normal form. 2/338 useless extension candidates. Maximal degree in co-relation 2151. Up to 128 conditions per place. [2023-08-31 01:17:33,018 INFO L137 encePairwiseOnDemand]: 729/736 looper letters, 65 selfloop transitions, 34 changer transitions 9/108 dead transitions. [2023-08-31 01:17:33,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 1624 flow [2023-08-31 01:17:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:17:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:17:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2061 transitions. [2023-08-31 01:17:33,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000388198757764 [2023-08-31 01:17:33,020 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2061 transitions. [2023-08-31 01:17:33,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2061 transitions. [2023-08-31 01:17:33,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:33,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2061 transitions. [2023-08-31 01:17:33,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 294.42857142857144) internal successors, (2061), 7 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,025 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 736.0) internal successors, (5888), 8 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,026 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 1234 flow. Second operand 7 states and 2061 transitions. [2023-08-31 01:17:33,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 1624 flow [2023-08-31 01:17:33,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 108 transitions, 1500 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-31 01:17:33,036 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 1209 flow [2023-08-31 01:17:33,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1209, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-08-31 01:17:33,036 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 73 predicate places. [2023-08-31 01:17:33,036 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 1209 flow [2023-08-31 01:17:33,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 290.42857142857144) internal successors, (2033), 7 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:33,037 INFO L208 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] [2023-08-31 01:17:33,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 01:17:33,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:33,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -75835145, now seen corresponding path program 2 times [2023-08-31 01:17:33,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:33,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151747433] [2023-08-31 01:17:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:33,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:33,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151747433] [2023-08-31 01:17:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151747433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:17:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520104188] [2023-08-31 01:17:33,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:33,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:17:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:17:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:17:33,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 736 [2023-08-31 01:17:33,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 1209 flow. Second operand has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:33,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 736 [2023-08-31 01:17:33,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:33,634 INFO L130 PetriNetUnfolder]: 116/326 cut-off events. [2023-08-31 01:17:33,634 INFO L131 PetriNetUnfolder]: For 3199/3199 co-relation queries the response was YES. [2023-08-31 01:17:33,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2053 conditions, 326 events. 116/326 cut-off events. For 3199/3199 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1605 event pairs, 66 based on Foata normal form. 3/328 useless extension candidates. Maximal degree in co-relation 2005. Up to 248 conditions per place. [2023-08-31 01:17:33,637 INFO L137 encePairwiseOnDemand]: 731/736 looper letters, 58 selfloop transitions, 20 changer transitions 15/93 dead transitions. [2023-08-31 01:17:33,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 93 transitions, 1419 flow [2023-08-31 01:17:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:17:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:17:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1516 transitions. [2023-08-31 01:17:33,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41195652173913044 [2023-08-31 01:17:33,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1516 transitions. [2023-08-31 01:17:33,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1516 transitions. [2023-08-31 01:17:33,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:33,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1516 transitions. [2023-08-31 01:17:33,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 303.2) internal successors, (1516), 5 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,650 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 1209 flow. Second operand 5 states and 1516 transitions. [2023-08-31 01:17:33,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 93 transitions, 1419 flow [2023-08-31 01:17:33,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 1404 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 01:17:33,659 INFO L231 Difference]: Finished difference. Result has 103 places, 76 transitions, 1090 flow [2023-08-31 01:17:33,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1090, PETRI_PLACES=103, PETRI_TRANSITIONS=76} [2023-08-31 01:17:33,660 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2023-08-31 01:17:33,660 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 76 transitions, 1090 flow [2023-08-31 01:17:33,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:33,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:33,660 INFO L208 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] [2023-08-31 01:17:33,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 01:17:33,660 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:33,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1032254093, now seen corresponding path program 3 times [2023-08-31 01:17:33,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:33,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73808474] [2023-08-31 01:17:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:34,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73808474] [2023-08-31 01:17:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73808474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:34,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:34,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:17:34,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368497930] [2023-08-31 01:17:34,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:34,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:17:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:17:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:17:34,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 736 [2023-08-31 01:17:34,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 76 transitions, 1090 flow. Second operand has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:34,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:34,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 736 [2023-08-31 01:17:34,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:34,330 INFO L130 PetriNetUnfolder]: 102/284 cut-off events. [2023-08-31 01:17:34,330 INFO L131 PetriNetUnfolder]: For 2940/2940 co-relation queries the response was YES. [2023-08-31 01:17:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 284 events. 102/284 cut-off events. For 2940/2940 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1343 event pairs, 26 based on Foata normal form. 5/288 useless extension candidates. Maximal degree in co-relation 1819. Up to 115 conditions per place. [2023-08-31 01:17:34,331 INFO L137 encePairwiseOnDemand]: 732/736 looper letters, 38 selfloop transitions, 2 changer transitions 46/86 dead transitions. [2023-08-31 01:17:34,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 86 transitions, 1290 flow [2023-08-31 01:17:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:17:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:17:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1520 transitions. [2023-08-31 01:17:34,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-08-31 01:17:34,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1520 transitions. [2023-08-31 01:17:34,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1520 transitions. [2023-08-31 01:17:34,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:34,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1520 transitions. [2023-08-31 01:17:34,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:34,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:34,339 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 736.0) internal successors, (4416), 6 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:34,339 INFO L175 Difference]: Start difference. First operand has 103 places, 76 transitions, 1090 flow. Second operand 5 states and 1520 transitions. [2023-08-31 01:17:34,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 86 transitions, 1290 flow [2023-08-31 01:17:34,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 1225 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-31 01:17:34,354 INFO L231 Difference]: Finished difference. Result has 99 places, 37 transitions, 343 flow [2023-08-31 01:17:34,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=99, PETRI_TRANSITIONS=37} [2023-08-31 01:17:34,355 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 72 predicate places. [2023-08-31 01:17:34,355 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 37 transitions, 343 flow [2023-08-31 01:17:34,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 300.8) internal successors, (1504), 5 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:34,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:34,355 INFO L208 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] [2023-08-31 01:17:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 01:17:34,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:34,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash -461531297, now seen corresponding path program 4 times [2023-08-31 01:17:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322550620] [2023-08-31 01:17:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:34,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:35,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:35,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322550620] [2023-08-31 01:17:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322550620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:35,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 01:17:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036981880] [2023-08-31 01:17:35,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:35,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:17:35,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:17:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:17:36,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-31 01:17:36,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 37 transitions, 343 flow. Second operand has 14 states, 14 states have (on average 275.7142857142857) internal successors, (3860), 14 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:36,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:36,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-31 01:17:36,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:36,539 INFO L130 PetriNetUnfolder]: 26/87 cut-off events. [2023-08-31 01:17:36,539 INFO L131 PetriNetUnfolder]: For 917/917 co-relation queries the response was YES. [2023-08-31 01:17:36,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 87 events. 26/87 cut-off events. For 917/917 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 6 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 469. Up to 26 conditions per place. [2023-08-31 01:17:36,540 INFO L137 encePairwiseOnDemand]: 727/736 looper letters, 30 selfloop transitions, 8 changer transitions 16/54 dead transitions. [2023-08-31 01:17:36,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 54 transitions, 551 flow [2023-08-31 01:17:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2511 transitions. [2023-08-31 01:17:36,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37907608695652173 [2023-08-31 01:17:36,545 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2511 transitions. [2023-08-31 01:17:36,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2511 transitions. [2023-08-31 01:17:36,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:36,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2511 transitions. [2023-08-31 01:17:36,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.0) internal successors, (2511), 9 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:36,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:36,554 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:36,554 INFO L175 Difference]: Start difference. First operand has 99 places, 37 transitions, 343 flow. Second operand 9 states and 2511 transitions. [2023-08-31 01:17:36,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 54 transitions, 551 flow [2023-08-31 01:17:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 347 flow, removed 27 selfloop flow, removed 39 redundant places. [2023-08-31 01:17:36,557 INFO L231 Difference]: Finished difference. Result has 57 places, 31 transitions, 166 flow [2023-08-31 01:17:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=31} [2023-08-31 01:17:36,557 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2023-08-31 01:17:36,557 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 31 transitions, 166 flow [2023-08-31 01:17:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.7142857142857) internal successors, (3860), 14 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:36,558 INFO L208 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] [2023-08-31 01:17:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 01:17:36,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:36,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 481613323, now seen corresponding path program 5 times [2023-08-31 01:17:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704088310] [2023-08-31 01:17:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704088310] [2023-08-31 01:17:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704088310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:37,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:37,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 01:17:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784188459] [2023-08-31 01:17:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:37,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:17:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:17:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:17:38,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 736 [2023-08-31 01:17:38,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 31 transitions, 166 flow. Second operand has 13 states, 13 states have (on average 277.84615384615387) internal successors, (3612), 13 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:38,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 736 [2023-08-31 01:17:38,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:38,331 INFO L130 PetriNetUnfolder]: 9/46 cut-off events. [2023-08-31 01:17:38,332 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-31 01:17:38,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 46 events. 9/46 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 3 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 171. Up to 16 conditions per place. [2023-08-31 01:17:38,332 INFO L137 encePairwiseOnDemand]: 728/736 looper letters, 22 selfloop transitions, 6 changer transitions 10/38 dead transitions. [2023-08-31 01:17:38,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 259 flow [2023-08-31 01:17:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:17:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:17:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2519 transitions. [2023-08-31 01:17:38,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38028381642512077 [2023-08-31 01:17:38,336 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2519 transitions. [2023-08-31 01:17:38,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2519 transitions. [2023-08-31 01:17:38,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:38,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2519 transitions. [2023-08-31 01:17:38,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 279.8888888888889) internal successors, (2519), 9 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,343 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 736.0) internal successors, (7360), 10 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,343 INFO L175 Difference]: Start difference. First operand has 57 places, 31 transitions, 166 flow. Second operand 9 states and 2519 transitions. [2023-08-31 01:17:38,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 259 flow [2023-08-31 01:17:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 218 flow, removed 2 selfloop flow, removed 15 redundant places. [2023-08-31 01:17:38,345 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 121 flow [2023-08-31 01:17:38,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-31 01:17:38,345 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-31 01:17:38,345 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 121 flow [2023-08-31 01:17:38,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 277.84615384615387) internal successors, (3612), 13 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:38,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:17:38,346 INFO L208 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] [2023-08-31 01:17:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 01:17:38,346 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:17:38,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:17:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1200415825, now seen corresponding path program 6 times [2023-08-31 01:17:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:17:38,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86048675] [2023-08-31 01:17:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:17:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:17:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:17:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:17:38,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:17:38,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86048675] [2023-08-31 01:17:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86048675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:17:38,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:17:38,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:17:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312049517] [2023-08-31 01:17:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:17:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:17:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:17:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:17:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:17:39,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 736 [2023-08-31 01:17:39,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 121 flow. Second operand has 9 states, 9 states have (on average 291.6666666666667) internal successors, (2625), 9 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:39,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:17:39,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 736 [2023-08-31 01:17:39,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:17:39,432 INFO L130 PetriNetUnfolder]: 7/33 cut-off events. [2023-08-31 01:17:39,432 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 01:17:39,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 33 events. 7/33 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 112. Up to 18 conditions per place. [2023-08-31 01:17:39,432 INFO L137 encePairwiseOnDemand]: 731/736 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-31 01:17:39,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 30 transitions, 184 flow [2023-08-31 01:17:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:17:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:17:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1761 transitions. [2023-08-31 01:17:39,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39877717391304346 [2023-08-31 01:17:39,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1761 transitions. [2023-08-31 01:17:39,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1761 transitions. [2023-08-31 01:17:39,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:17:39,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1761 transitions. [2023-08-31 01:17:39,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 293.5) internal successors, (1761), 6 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:39,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 736.0) internal successors, (5152), 7 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:39,438 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 736.0) internal successors, (5152), 7 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:39,438 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 121 flow. Second operand 6 states and 1761 transitions. [2023-08-31 01:17:39,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 30 transitions, 184 flow [2023-08-31 01:17:39,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 158 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-31 01:17:39,439 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-31 01:17:39,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-31 01:17:39,439 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2023-08-31 01:17:39,439 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-31 01:17:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 291.6666666666667) internal successors, (2625), 9 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:17:39,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-31 01:17:39,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-31 01:17:39,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-31 01:17:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 01:17:39,442 INFO L445 BasicCegarLoop]: Path program histogram: [12, 6, 1, 1, 1, 1] [2023-08-31 01:17:39,444 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 01:17:39,444 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 01:17:39,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 01:17:39 BasicIcfg [2023-08-31 01:17:39,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 01:17:39,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 01:17:39,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 01:17:39,446 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 01:17:39,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:17:00" (3/4) ... [2023-08-31 01:17:39,448 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 01:17:39,451 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-31 01:17:39,452 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-31 01:17:39,455 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 35 nodes and edges [2023-08-31 01:17:39,456 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-31 01:17:39,456 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-31 01:17:39,456 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-31 01:17:39,481 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 01:17:39,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 01:17:39,482 INFO L158 Benchmark]: Toolchain (without parser) took 39825.68ms. Allocated memory was 100.7MB in the beginning and 595.6MB in the end (delta: 494.9MB). Free memory was 78.1MB in the beginning and 352.2MB in the end (delta: -274.1MB). Peak memory consumption was 219.7MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,482 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 01:17:39,482 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.59ms. Allocated memory is still 100.7MB. Free memory was 78.1MB in the beginning and 65.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,483 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.63ms. Allocated memory is still 100.7MB. Free memory was 65.7MB in the beginning and 63.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,483 INFO L158 Benchmark]: Boogie Preprocessor took 41.63ms. Allocated memory is still 100.7MB. Free memory was 63.1MB in the beginning and 61.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,483 INFO L158 Benchmark]: RCFGBuilder took 487.77ms. Allocated memory is still 100.7MB. Free memory was 61.0MB in the beginning and 63.7MB in the end (delta: -2.7MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,483 INFO L158 Benchmark]: TraceAbstraction took 38969.57ms. Allocated memory was 100.7MB in the beginning and 595.6MB in the end (delta: 494.9MB). Free memory was 63.2MB in the beginning and 357.5MB in the end (delta: -294.3MB). Peak memory consumption was 200.1MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,483 INFO L158 Benchmark]: Witness Printer took 35.95ms. Allocated memory is still 595.6MB. Free memory was 357.5MB in the beginning and 352.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 01:17:39,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.59ms. Allocated memory is still 100.7MB. Free memory was 78.1MB in the beginning and 65.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.63ms. Allocated memory is still 100.7MB. Free memory was 65.7MB in the beginning and 63.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.63ms. Allocated memory is still 100.7MB. Free memory was 63.1MB in the beginning and 61.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 487.77ms. Allocated memory is still 100.7MB. Free memory was 61.0MB in the beginning and 63.7MB in the end (delta: -2.7MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * TraceAbstraction took 38969.57ms. Allocated memory was 100.7MB in the beginning and 595.6MB in the end (delta: 494.9MB). Free memory was 63.2MB in the beginning and 357.5MB in the end (delta: -294.3MB). Peak memory consumption was 200.1MB. Max. memory is 16.1GB. * Witness Printer took 35.95ms. Allocated memory is still 595.6MB. Free memory was 357.5MB in the beginning and 352.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.5s, 312 PlacesBefore, 27 PlacesAfterwards, 333 TransitionsBefore, 25 TransitionsAfterwards, 6048 CoEnabledTransitionPairs, 8 FixpointIterations, 198 TrivialSequentialCompositions, 90 ConcurrentSequentialCompositions, 57 TrivialYvCompositions, 25 ConcurrentYvCompositions, 23 ChoiceCompositions, 393 TotalNumberOfCompositions, 6391 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5583, independent: 5482, independent conditional: 0, independent unconditional: 5482, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3489, independent: 3467, independent conditional: 0, independent unconditional: 3467, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5583, independent: 2015, independent conditional: 0, independent unconditional: 2015, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 3489, unknown conditional: 0, unknown unconditional: 3489] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 408 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.8s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8325 SdHoareTripleChecker+Valid, 12.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6645 mSDsluCounter, 11264 SdHoareTripleChecker+Invalid, 10.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10784 mSDsCounter, 176 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21656 IncrementalHoareTripleChecker+Invalid, 21832 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 176 mSolverCounterUnsat, 480 mSDtfsCounter, 21656 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 251 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=14, InterpolantAutomatonStates: 159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 486 NumberOfCodeBlocks, 486 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 464 ConstructedInterpolants, 0 QuantifiedInterpolants, 8650 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 78/78 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-31 01:17:39,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE