./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_longest.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/queue_longest.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:08:00,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:08:00,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:08:00,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:08:00,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:08:00,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:08:00,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:08:00,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:08:00,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:08:00,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:08:00,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:08:00,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:08:00,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:08:00,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:08:00,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:08:00,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:08:00,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:08:00,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:08:00,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:08:00,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:08:00,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:08:00,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:08:00,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:08:00,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:08:00,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:08:00,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:08:00,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:08:00,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:08:00,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:08:00,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:08:00,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:08:00,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:08:00,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:08:00,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:08:01,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:08:01,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:08:01,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:08:01,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:08:01,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:08:01,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:08:01,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:08:01,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:08:01,032 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:08:01,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:08:01,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:08:01,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:08:01,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:08:01,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:08:01,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:08:01,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:08:01,035 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:08:01,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:08:01,036 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:08:01,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:08:01,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:08:01,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:08:01,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:08:01,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:08:01,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:08:01,038 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:08:01,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:08:01,038 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:08:01,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:08:01,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:08:01,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:08:01,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:08:01,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:08:01,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:08:01,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:08:01,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:08:01,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:08:01,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:08:01,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:08:01,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:08:01,041 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:08:01,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:08:01,041 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:08:01,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:08:01,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:08:01,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:08:01,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:08:01,360 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:08:01,360 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:08:01,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longest.i [2023-08-30 16:08:02,555 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:08:02,814 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:08:02,817 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i [2023-08-30 16:08:02,830 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/896965028/081325e5697947c09f99daa4e73b067b/FLAG9cd54ee7d [2023-08-30 16:08:02,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/896965028/081325e5697947c09f99daa4e73b067b [2023-08-30 16:08:02,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:08:02,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:08:02,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:08:02,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:08:02,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:08:02,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:08:02" (1/1) ... [2023-08-30 16:08:02,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cfd449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:02, skipping insertion in model container [2023-08-30 16:08:02,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:08:02" (1/1) ... [2023-08-30 16:08:02,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:08:02,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:08:03,244 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i[43296,43309] [2023-08-30 16:08:03,253 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i[43503,43516] [2023-08-30 16:08:03,260 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i[43783,43796] [2023-08-30 16:08:03,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:08:03,278 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:08:03,327 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i[43296,43309] [2023-08-30 16:08:03,329 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i[43503,43516] [2023-08-30 16:08:03,333 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i[43783,43796] [2023-08-30 16:08:03,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:08:03,389 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:08:03,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03 WrapperNode [2023-08-30 16:08:03,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:08:03,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:08:03,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:08:03,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:08:03,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,465 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-30 16:08:03,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:08:03,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:08:03,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:08:03,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:08:03,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:08:03,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:08:03,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:08:03,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:08:03,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:08:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:08:03,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 16:08:03,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 16:08:03,614 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:08:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:08:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:08:03,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:08:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:08:03,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:08:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:08:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:08:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 16:08:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:08:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:08:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:08:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:08:03,618 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:08:03,819 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:08:03,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:08:04,249 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:08:04,259 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:08:04,262 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:08:04,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:08:04 BoogieIcfgContainer [2023-08-30 16:08:04,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:08:04,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:08:04,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:08:04,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:08:04,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:08:02" (1/3) ... [2023-08-30 16:08:04,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1150a917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:08:04, skipping insertion in model container [2023-08-30 16:08:04,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (2/3) ... [2023-08-30 16:08:04,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1150a917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:08:04, skipping insertion in model container [2023-08-30 16:08:04,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:08:04" (3/3) ... [2023-08-30 16:08:04,272 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-08-30 16:08:04,279 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:08:04,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:08:04,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-30 16:08:04,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:08:04,389 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 16:08:04,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 258 transitions, 532 flow [2023-08-30 16:08:04,548 INFO L130 PetriNetUnfolder]: 15/256 cut-off events. [2023-08-30 16:08:04,548 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:08:04,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 256 events. 15/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 359 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 16:08:04,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 258 transitions, 532 flow [2023-08-30 16:08:04,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:08:04,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,631 INFO L130 PetriNetUnfolder]: 15/247 cut-off events. [2023-08-30 16:08:04,632 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:08:04,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 247 events. 15/247 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 326 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 16:08:04,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 15864 [2023-08-30 16:08:10,977 INFO L134 LiptonReduction]: Checked pairs total: 33075 [2023-08-30 16:08:10,978 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-30 16:08:10,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:08:10,995 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;@189495b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:08:10,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:08:10,997 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 16:08:10,997 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:08:10,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:10,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 16:08:10,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:11,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2023-08-30 16:08:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703972308] [2023-08-30 16:08:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703972308] [2023-08-30 16:08:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703972308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 16:08:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629035471] [2023-08-30 16:08:11,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:08:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:08:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:08:11,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 473 [2023-08-30 16:08:11,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 141 flow. Second operand has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:11,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 473 [2023-08-30 16:08:11,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:11,532 INFO L130 PetriNetUnfolder]: 1540/2645 cut-off events. [2023-08-30 16:08:11,533 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 16:08:11,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5115 conditions, 2645 events. 1540/2645 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 12466 event pairs, 1212 based on Foata normal form. 32/2302 useless extension candidates. Maximal degree in co-relation 4962. Up to 2396 conditions per place. [2023-08-30 16:08:11,546 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 53 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2023-08-30 16:08:11,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 241 flow [2023-08-30 16:08:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:08:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:08:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 546 transitions. [2023-08-30 16:08:11,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771670190274841 [2023-08-30 16:08:11,560 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 546 transitions. [2023-08-30 16:08:11,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 546 transitions. [2023-08-30 16:08:11,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:11,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 546 transitions. [2023-08-30 16:08:11,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.0) internal successors, (546), 2 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,572 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,574 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 141 flow. Second operand 2 states and 546 transitions. [2023-08-30 16:08:11,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 241 flow [2023-08-30 16:08:11,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:08:11,579 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 130 flow [2023-08-30 16:08:11,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-08-30 16:08:11,583 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-30 16:08:11,584 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 130 flow [2023-08-30 16:08:11,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:11,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:08:11,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:11,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 110343563, now seen corresponding path program 1 times [2023-08-30 16:08:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748321640] [2023-08-30 16:08:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:11,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748321640] [2023-08-30 16:08:11,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748321640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:11,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:11,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:08:11,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662573086] [2023-08-30 16:08:11,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:11,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:08:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:08:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:08:11,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 473 [2023-08-30 16:08:11,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:11,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 473 [2023-08-30 16:08:11,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:12,083 INFO L130 PetriNetUnfolder]: 1508/2611 cut-off events. [2023-08-30 16:08:12,083 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:08:12,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 2611 events. 1508/2611 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12447 event pairs, 1167 based on Foata normal form. 0/2268 useless extension candidates. Maximal degree in co-relation 5029. Up to 2249 conditions per place. [2023-08-30 16:08:12,095 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 68 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-30 16:08:12,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 310 flow [2023-08-30 16:08:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:08:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:08:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-08-30 16:08:12,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2023-08-30 16:08:12,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-08-30 16:08:12,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-08-30 16:08:12,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:12,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-08-30 16:08:12,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:12,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:12,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:12,115 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 130 flow. Second operand 3 states and 792 transitions. [2023-08-30 16:08:12,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 310 flow [2023-08-30 16:08:12,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:12,118 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2023-08-30 16:08:12,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-08-30 16:08:12,119 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-30 16:08:12,119 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2023-08-30 16:08:12,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:12,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:12,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:08:12,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:12,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1330496416, now seen corresponding path program 1 times [2023-08-30 16:08:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:12,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944180258] [2023-08-30 16:08:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:12,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:12,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:12,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944180258] [2023-08-30 16:08:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944180258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:12,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:08:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612378008] [2023-08-30 16:08:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:08:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:08:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:08:13,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 473 [2023-08-30 16:08:13,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:13,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:13,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 473 [2023-08-30 16:08:13,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:13,555 INFO L130 PetriNetUnfolder]: 1608/2744 cut-off events. [2023-08-30 16:08:13,555 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:08:13,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5428 conditions, 2744 events. 1608/2744 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 12803 event pairs, 1244 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 5424. Up to 2518 conditions per place. [2023-08-30 16:08:13,568 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 58 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2023-08-30 16:08:13,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 288 flow [2023-08-30 16:08:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:08:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:08:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1166 transitions. [2023-08-30 16:08:13,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2023-08-30 16:08:13,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1166 transitions. [2023-08-30 16:08:13,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1166 transitions. [2023-08-30 16:08:13,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:13,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1166 transitions. [2023-08-30 16:08:13,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.2) internal successors, (1166), 5 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:13,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:13,605 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:13,605 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 5 states and 1166 transitions. [2023-08-30 16:08:13,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 288 flow [2023-08-30 16:08:13,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:08:13,608 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 173 flow [2023-08-30 16:08:13,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-08-30 16:08:13,609 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-30 16:08:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 173 flow [2023-08-30 16:08:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:13,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:13,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:08:13,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:13,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash -588975779, now seen corresponding path program 1 times [2023-08-30 16:08:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:13,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005114202] [2023-08-30 16:08:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:14,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:14,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005114202] [2023-08-30 16:08:14,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005114202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:14,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:14,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:08:14,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369690019] [2023-08-30 16:08:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:14,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:08:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:08:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:08:14,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 473 [2023-08-30 16:08:14,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 220.16666666666666) internal successors, (1321), 6 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:14,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 473 [2023-08-30 16:08:14,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:14,719 INFO L130 PetriNetUnfolder]: 1839/3131 cut-off events. [2023-08-30 16:08:14,719 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:08:14,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6327 conditions, 3131 events. 1839/3131 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15156 event pairs, 302 based on Foata normal form. 17/2811 useless extension candidates. Maximal degree in co-relation 6320. Up to 2548 conditions per place. [2023-08-30 16:08:14,735 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 98 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2023-08-30 16:08:14,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 122 transitions, 526 flow [2023-08-30 16:08:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:08:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:08:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1420 transitions. [2023-08-30 16:08:14,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003523608174771 [2023-08-30 16:08:14,739 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1420 transitions. [2023-08-30 16:08:14,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1420 transitions. [2023-08-30 16:08:14,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:14,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1420 transitions. [2023-08-30 16:08:14,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 236.66666666666666) internal successors, (1420), 6 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,749 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,749 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 173 flow. Second operand 6 states and 1420 transitions. [2023-08-30 16:08:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 122 transitions, 526 flow [2023-08-30 16:08:14,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 122 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:14,754 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 263 flow [2023-08-30 16:08:14,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2023-08-30 16:08:14,755 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-08-30 16:08:14,756 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 263 flow [2023-08-30 16:08:14,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.16666666666666) internal successors, (1321), 6 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:14,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:08:14,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:14,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash -507576723, now seen corresponding path program 2 times [2023-08-30 16:08:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:14,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088640258] [2023-08-30 16:08:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:15,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088640258] [2023-08-30 16:08:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088640258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:15,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:08:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983297253] [2023-08-30 16:08:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:08:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:08:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:08:15,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 473 [2023-08-30 16:08:15,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:15,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:15,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 473 [2023-08-30 16:08:15,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:16,446 INFO L130 PetriNetUnfolder]: 1970/3344 cut-off events. [2023-08-30 16:08:16,447 INFO L131 PetriNetUnfolder]: For 620/620 co-relation queries the response was YES. [2023-08-30 16:08:16,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7238 conditions, 3344 events. 1970/3344 cut-off events. For 620/620 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 16365 event pairs, 834 based on Foata normal form. 17/3012 useless extension candidates. Maximal degree in co-relation 7227. Up to 2536 conditions per place. [2023-08-30 16:08:16,466 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 100 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2023-08-30 16:08:16,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 622 flow [2023-08-30 16:08:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:08:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:08:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1425 transitions. [2023-08-30 16:08:16,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021141649048626 [2023-08-30 16:08:16,470 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1425 transitions. [2023-08-30 16:08:16,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1425 transitions. [2023-08-30 16:08:16,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:16,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1425 transitions. [2023-08-30 16:08:16,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.5) internal successors, (1425), 6 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,479 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,479 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 263 flow. Second operand 6 states and 1425 transitions. [2023-08-30 16:08:16,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 622 flow [2023-08-30 16:08:16,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 614 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:16,485 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 342 flow [2023-08-30 16:08:16,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2023-08-30 16:08:16,488 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-30 16:08:16,488 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 342 flow [2023-08-30 16:08:16,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:16,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:16,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:08:16,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:16,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1152821177, now seen corresponding path program 3 times [2023-08-30 16:08:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:16,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029479694] [2023-08-30 16:08:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:17,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:17,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029479694] [2023-08-30 16:08:17,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029479694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:17,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:17,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:08:17,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375473913] [2023-08-30 16:08:17,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:17,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:08:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:08:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:08:17,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 473 [2023-08-30 16:08:17,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 342 flow. Second operand has 9 states, 9 states have (on average 207.44444444444446) internal successors, (1867), 9 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:17,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:17,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 473 [2023-08-30 16:08:17,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:18,549 INFO L130 PetriNetUnfolder]: 2695/4564 cut-off events. [2023-08-30 16:08:18,550 INFO L131 PetriNetUnfolder]: For 1308/1308 co-relation queries the response was YES. [2023-08-30 16:08:18,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10132 conditions, 4564 events. 2695/4564 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 24051 event pairs, 579 based on Foata normal form. 0/4082 useless extension candidates. Maximal degree in co-relation 10118. Up to 2481 conditions per place. [2023-08-30 16:08:18,579 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 156 selfloop transitions, 25 changer transitions 3/192 dead transitions. [2023-08-30 16:08:18,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 192 transitions, 970 flow [2023-08-30 16:08:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2027 transitions. [2023-08-30 16:08:18,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47615691801738314 [2023-08-30 16:08:18,585 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2027 transitions. [2023-08-30 16:08:18,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2027 transitions. [2023-08-30 16:08:18,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:18,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2027 transitions. [2023-08-30 16:08:18,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.22222222222223) internal successors, (2027), 9 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:18,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:18,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:18,596 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 342 flow. Second operand 9 states and 2027 transitions. [2023-08-30 16:08:18,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 192 transitions, 970 flow [2023-08-30 16:08:18,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 192 transitions, 960 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:18,604 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 455 flow [2023-08-30 16:08:18,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=455, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2023-08-30 16:08:18,605 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2023-08-30 16:08:18,605 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 455 flow [2023-08-30 16:08:18,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 207.44444444444446) internal successors, (1867), 9 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:18,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:18,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:18,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:08:18,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:18,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash 454650260, now seen corresponding path program 1 times [2023-08-30 16:08:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:18,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409341649] [2023-08-30 16:08:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:18,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:19,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:19,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409341649] [2023-08-30 16:08:19,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409341649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:19,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:19,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:08:19,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503565634] [2023-08-30 16:08:19,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:19,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:08:19,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:08:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:08:19,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 473 [2023-08-30 16:08:19,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 455 flow. Second operand has 10 states, 10 states have (on average 206.3) internal successors, (2063), 10 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:19,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:19,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 473 [2023-08-30 16:08:19,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:20,573 INFO L130 PetriNetUnfolder]: 2672/4539 cut-off events. [2023-08-30 16:08:20,573 INFO L131 PetriNetUnfolder]: For 2319/2319 co-relation queries the response was YES. [2023-08-30 16:08:20,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10719 conditions, 4539 events. 2672/4539 cut-off events. For 2319/2319 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 23922 event pairs, 1905 based on Foata normal form. 0/4050 useless extension candidates. Maximal degree in co-relation 10700. Up to 4236 conditions per place. [2023-08-30 16:08:20,599 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 88 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2023-08-30 16:08:20,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 113 transitions, 737 flow [2023-08-30 16:08:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1926 transitions. [2023-08-30 16:08:20,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2023-08-30 16:08:20,604 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1926 transitions. [2023-08-30 16:08:20,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1926 transitions. [2023-08-30 16:08:20,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:20,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1926 transitions. [2023-08-30 16:08:20,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,616 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,616 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 455 flow. Second operand 9 states and 1926 transitions. [2023-08-30 16:08:20,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 113 transitions, 737 flow [2023-08-30 16:08:20,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 113 transitions, 704 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 16:08:20,625 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 528 flow [2023-08-30 16:08:20,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2023-08-30 16:08:20,626 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 40 predicate places. [2023-08-30 16:08:20,626 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 528 flow [2023-08-30 16:08:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.3) internal successors, (2063), 10 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:20,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:20,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:08:20,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:20,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash -535562244, now seen corresponding path program 1 times [2023-08-30 16:08:20,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:20,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47040197] [2023-08-30 16:08:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:20,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47040197] [2023-08-30 16:08:20,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47040197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:20,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:20,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:08:20,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058476678] [2023-08-30 16:08:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:08:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:08:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:08:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 473 [2023-08-30 16:08:20,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:20,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 473 [2023-08-30 16:08:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:20,993 INFO L130 PetriNetUnfolder]: 1649/2849 cut-off events. [2023-08-30 16:08:20,993 INFO L131 PetriNetUnfolder]: For 699/713 co-relation queries the response was YES. [2023-08-30 16:08:21,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6374 conditions, 2849 events. 1649/2849 cut-off events. For 699/713 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12225 event pairs, 878 based on Foata normal form. 126/2580 useless extension candidates. Maximal degree in co-relation 6350. Up to 1353 conditions per place. [2023-08-30 16:08:21,010 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 96 selfloop transitions, 3 changer transitions 1/112 dead transitions. [2023-08-30 16:08:21,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 682 flow [2023-08-30 16:08:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:08:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:08:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-30 16:08:21,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637773079633545 [2023-08-30 16:08:21,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-30 16:08:21,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-30 16:08:21,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:21,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-30 16:08:21,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,018 INFO L175 Difference]: Start difference. First operand has 103 places, 102 transitions, 528 flow. Second operand 3 states and 800 transitions. [2023-08-30 16:08:21,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 682 flow [2023-08-30 16:08:21,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 605 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-08-30 16:08:21,023 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 365 flow [2023-08-30 16:08:21,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2023-08-30 16:08:21,024 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2023-08-30 16:08:21,024 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 365 flow [2023-08-30 16:08:21,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:21,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:21,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:08:21,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:21,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1966953527, now seen corresponding path program 1 times [2023-08-30 16:08:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:21,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969630428] [2023-08-30 16:08:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:21,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:21,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969630428] [2023-08-30 16:08:21,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969630428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:21,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:21,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 16:08:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899028511] [2023-08-30 16:08:21,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:21,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:08:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:08:21,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:08:22,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:22,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 365 flow. Second operand has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:22,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:22,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:22,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:23,054 INFO L130 PetriNetUnfolder]: 1644/2906 cut-off events. [2023-08-30 16:08:23,054 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2023-08-30 16:08:23,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6340 conditions, 2906 events. 1644/2906 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12791 event pairs, 533 based on Foata normal form. 9/2528 useless extension candidates. Maximal degree in co-relation 6320. Up to 2003 conditions per place. [2023-08-30 16:08:23,071 INFO L137 encePairwiseOnDemand]: 461/473 looper letters, 95 selfloop transitions, 23 changer transitions 10/137 dead transitions. [2023-08-30 16:08:23,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 730 flow [2023-08-30 16:08:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1934 transitions. [2023-08-30 16:08:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45431054733380316 [2023-08-30 16:08:23,076 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1934 transitions. [2023-08-30 16:08:23,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1934 transitions. [2023-08-30 16:08:23,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:23,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1934 transitions. [2023-08-30 16:08:23,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.88888888888889) internal successors, (1934), 9 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:23,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:23,101 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:23,101 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 365 flow. Second operand 9 states and 1934 transitions. [2023-08-30 16:08:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 730 flow [2023-08-30 16:08:23,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 713 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 16:08:23,106 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 417 flow [2023-08-30 16:08:23,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2023-08-30 16:08:23,107 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 34 predicate places. [2023-08-30 16:08:23,110 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 417 flow [2023-08-30 16:08:23,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:23,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:23,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:23,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:08:23,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:23,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:23,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1215939803, now seen corresponding path program 2 times [2023-08-30 16:08:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:23,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424503414] [2023-08-30 16:08:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:23,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424503414] [2023-08-30 16:08:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424503414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:23,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:23,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 16:08:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153591869] [2023-08-30 16:08:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:23,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:08:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:08:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:08:24,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:24,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 417 flow. Second operand has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:24,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:24,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:24,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:25,488 INFO L130 PetriNetUnfolder]: 1778/3157 cut-off events. [2023-08-30 16:08:25,488 INFO L131 PetriNetUnfolder]: For 694/694 co-relation queries the response was YES. [2023-08-30 16:08:25,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7051 conditions, 3157 events. 1778/3157 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 14505 event pairs, 469 based on Foata normal form. 0/2733 useless extension candidates. Maximal degree in co-relation 7031. Up to 1744 conditions per place. [2023-08-30 16:08:25,501 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 100 selfloop transitions, 27 changer transitions 12/148 dead transitions. [2023-08-30 16:08:25,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 148 transitions, 849 flow [2023-08-30 16:08:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1941 transitions. [2023-08-30 16:08:25,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559548978153629 [2023-08-30 16:08:25,508 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1941 transitions. [2023-08-30 16:08:25,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1941 transitions. [2023-08-30 16:08:25,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:25,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1941 transitions. [2023-08-30 16:08:25,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 215.66666666666666) internal successors, (1941), 9 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,518 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,519 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 417 flow. Second operand 9 states and 1941 transitions. [2023-08-30 16:08:25,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 148 transitions, 849 flow [2023-08-30 16:08:25,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 148 transitions, 808 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-30 16:08:25,525 INFO L231 Difference]: Finished difference. Result has 102 places, 89 transitions, 476 flow [2023-08-30 16:08:25,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=102, PETRI_TRANSITIONS=89} [2023-08-30 16:08:25,527 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 39 predicate places. [2023-08-30 16:08:25,527 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 89 transitions, 476 flow [2023-08-30 16:08:25,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:25,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:25,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:08:25,528 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:25,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1213258613, now seen corresponding path program 3 times [2023-08-30 16:08:25,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474728547] [2023-08-30 16:08:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:25,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:26,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:26,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474728547] [2023-08-30 16:08:26,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474728547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:26,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:26,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 16:08:26,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976992059] [2023-08-30 16:08:26,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:08:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:08:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:08:26,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:26,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 89 transitions, 476 flow. Second operand has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:26,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:26,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:26,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:27,648 INFO L130 PetriNetUnfolder]: 1791/3168 cut-off events. [2023-08-30 16:08:27,649 INFO L131 PetriNetUnfolder]: For 792/792 co-relation queries the response was YES. [2023-08-30 16:08:27,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7229 conditions, 3168 events. 1791/3168 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 14388 event pairs, 515 based on Foata normal form. 0/2741 useless extension candidates. Maximal degree in co-relation 7207. Up to 1744 conditions per place. [2023-08-30 16:08:27,669 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 94 selfloop transitions, 28 changer transitions 9/140 dead transitions. [2023-08-30 16:08:27,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 140 transitions, 859 flow [2023-08-30 16:08:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1930 transitions. [2023-08-30 16:08:27,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45337091848719757 [2023-08-30 16:08:27,698 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1930 transitions. [2023-08-30 16:08:27,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1930 transitions. [2023-08-30 16:08:27,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:27,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1930 transitions. [2023-08-30 16:08:27,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.44444444444446) internal successors, (1930), 9 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,709 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,709 INFO L175 Difference]: Start difference. First operand has 102 places, 89 transitions, 476 flow. Second operand 9 states and 1930 transitions. [2023-08-30 16:08:27,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 140 transitions, 859 flow [2023-08-30 16:08:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 140 transitions, 822 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 16:08:27,715 INFO L231 Difference]: Finished difference. Result has 105 places, 90 transitions, 514 flow [2023-08-30 16:08:27,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2023-08-30 16:08:27,716 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2023-08-30 16:08:27,716 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 514 flow [2023-08-30 16:08:27,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:27,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:27,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:08:27,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:27,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1209251243, now seen corresponding path program 4 times [2023-08-30 16:08:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122844791] [2023-08-30 16:08:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:28,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122844791] [2023-08-30 16:08:28,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122844791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:28,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:28,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 16:08:28,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671725835] [2023-08-30 16:08:28,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:28,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:08:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:08:28,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:08:29,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:29,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 514 flow. Second operand has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:29,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:29,729 INFO L130 PetriNetUnfolder]: 1778/3137 cut-off events. [2023-08-30 16:08:29,729 INFO L131 PetriNetUnfolder]: For 925/925 co-relation queries the response was YES. [2023-08-30 16:08:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 3137 events. 1778/3137 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 14151 event pairs, 504 based on Foata normal form. 0/2721 useless extension candidates. Maximal degree in co-relation 7239. Up to 1744 conditions per place. [2023-08-30 16:08:29,746 INFO L137 encePairwiseOnDemand]: 463/473 looper letters, 92 selfloop transitions, 28 changer transitions 10/138 dead transitions. [2023-08-30 16:08:29,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 881 flow [2023-08-30 16:08:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1928 transitions. [2023-08-30 16:08:29,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529011040638948 [2023-08-30 16:08:29,753 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1928 transitions. [2023-08-30 16:08:29,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1928 transitions. [2023-08-30 16:08:29,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:29,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1928 transitions. [2023-08-30 16:08:29,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.22222222222223) internal successors, (1928), 9 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,762 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,763 INFO L175 Difference]: Start difference. First operand has 105 places, 90 transitions, 514 flow. Second operand 9 states and 1928 transitions. [2023-08-30 16:08:29,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 881 flow [2023-08-30 16:08:29,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 138 transitions, 848 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 16:08:29,795 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 529 flow [2023-08-30 16:08:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=529, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2023-08-30 16:08:29,796 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2023-08-30 16:08:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 529 flow [2023-08-30 16:08:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:29,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:08:29,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:29,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1942684503, now seen corresponding path program 1 times [2023-08-30 16:08:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:29,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390085258] [2023-08-30 16:08:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390085258] [2023-08-30 16:08:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390085258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:29,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:08:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131832447] [2023-08-30 16:08:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:29,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:08:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:08:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:08:29,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 473 [2023-08-30 16:08:29,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 529 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:29,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 473 [2023-08-30 16:08:29,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:30,092 INFO L130 PetriNetUnfolder]: 1119/2092 cut-off events. [2023-08-30 16:08:30,093 INFO L131 PetriNetUnfolder]: For 919/919 co-relation queries the response was YES. [2023-08-30 16:08:30,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5165 conditions, 2092 events. 1119/2092 cut-off events. For 919/919 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9421 event pairs, 278 based on Foata normal form. 2/1928 useless extension candidates. Maximal degree in co-relation 5142. Up to 1502 conditions per place. [2023-08-30 16:08:30,103 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 80 selfloop transitions, 6 changer transitions 1/100 dead transitions. [2023-08-30 16:08:30,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 100 transitions, 743 flow [2023-08-30 16:08:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:08:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:08:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-08-30 16:08:30,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461592670894997 [2023-08-30 16:08:30,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-08-30 16:08:30,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-08-30 16:08:30,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:30,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-08-30 16:08:30,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,111 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 529 flow. Second operand 3 states and 775 transitions. [2023-08-30 16:08:30,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 100 transitions, 743 flow [2023-08-30 16:08:30,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 100 transitions, 685 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 16:08:30,118 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 483 flow [2023-08-30 16:08:30,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2023-08-30 16:08:30,119 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2023-08-30 16:08:30,119 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 483 flow [2023-08-30 16:08:30,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:30,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:30,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:08:30,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:30,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 272642884, now seen corresponding path program 1 times [2023-08-30 16:08:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402693008] [2023-08-30 16:08:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402693008] [2023-08-30 16:08:31,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402693008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:31,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:31,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 16:08:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454057175] [2023-08-30 16:08:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:08:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:08:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:08:31,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 473 [2023-08-30 16:08:31,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 483 flow. Second operand has 13 states, 13 states have (on average 211.69230769230768) internal successors, (2752), 13 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:31,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:31,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 473 [2023-08-30 16:08:31,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:32,444 INFO L130 PetriNetUnfolder]: 1155/2163 cut-off events. [2023-08-30 16:08:32,444 INFO L131 PetriNetUnfolder]: For 778/780 co-relation queries the response was YES. [2023-08-30 16:08:32,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5325 conditions, 2163 events. 1155/2163 cut-off events. For 778/780 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9844 event pairs, 500 based on Foata normal form. 0/2080 useless extension candidates. Maximal degree in co-relation 5302. Up to 1247 conditions per place. [2023-08-30 16:08:32,453 INFO L137 encePairwiseOnDemand]: 457/473 looper letters, 108 selfloop transitions, 31 changer transitions 12/159 dead transitions. [2023-08-30 16:08:32,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 159 transitions, 976 flow [2023-08-30 16:08:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:08:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:08:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2641 transitions. [2023-08-30 16:08:32,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465292459478506 [2023-08-30 16:08:32,460 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2641 transitions. [2023-08-30 16:08:32,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2641 transitions. [2023-08-30 16:08:32,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:32,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2641 transitions. [2023-08-30 16:08:32,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 220.08333333333334) internal successors, (2641), 12 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,473 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,474 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 483 flow. Second operand 12 states and 2641 transitions. [2023-08-30 16:08:32,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 159 transitions, 976 flow [2023-08-30 16:08:32,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 966 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:08:32,480 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 618 flow [2023-08-30 16:08:32,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=618, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2023-08-30 16:08:32,481 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 50 predicate places. [2023-08-30 16:08:32,481 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 618 flow [2023-08-30 16:08:32,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 211.69230769230768) internal successors, (2752), 13 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:32,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:32,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:08:32,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:32,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash -54871982, now seen corresponding path program 2 times [2023-08-30 16:08:32,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:32,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380523728] [2023-08-30 16:08:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:32,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:34,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380523728] [2023-08-30 16:08:34,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380523728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:34,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:34,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 16:08:34,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956089115] [2023-08-30 16:08:34,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:34,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 16:08:34,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 16:08:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-08-30 16:08:35,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 473 [2023-08-30 16:08:35,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 618 flow. Second operand has 17 states, 17 states have (on average 209.05882352941177) internal successors, (3554), 17 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:35,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:35,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 473 [2023-08-30 16:08:35,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:36,054 INFO L130 PetriNetUnfolder]: 1687/3169 cut-off events. [2023-08-30 16:08:36,055 INFO L131 PetriNetUnfolder]: For 1108/1112 co-relation queries the response was YES. [2023-08-30 16:08:36,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7916 conditions, 3169 events. 1687/3169 cut-off events. For 1108/1112 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 15702 event pairs, 284 based on Foata normal form. 0/3083 useless extension candidates. Maximal degree in co-relation 7889. Up to 1008 conditions per place. [2023-08-30 16:08:36,071 INFO L137 encePairwiseOnDemand]: 458/473 looper letters, 155 selfloop transitions, 31 changer transitions 7/201 dead transitions. [2023-08-30 16:08:36,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 1283 flow [2023-08-30 16:08:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:08:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:08:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2854 transitions. [2023-08-30 16:08:36,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46414051065213857 [2023-08-30 16:08:36,077 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2854 transitions. [2023-08-30 16:08:36,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2854 transitions. [2023-08-30 16:08:36,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:36,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2854 transitions. [2023-08-30 16:08:36,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 219.53846153846155) internal successors, (2854), 13 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:36,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:36,092 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:36,092 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 618 flow. Second operand 13 states and 2854 transitions. [2023-08-30 16:08:36,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 1283 flow [2023-08-30 16:08:36,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 201 transitions, 1224 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 16:08:36,102 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 707 flow [2023-08-30 16:08:36,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=707, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-30 16:08:36,102 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 60 predicate places. [2023-08-30 16:08:36,103 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 707 flow [2023-08-30 16:08:36,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 209.05882352941177) internal successors, (3554), 17 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:36,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:36,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:36,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:08:36,104 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:36,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1056373008, now seen corresponding path program 1 times [2023-08-30 16:08:36,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:36,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957939004] [2023-08-30 16:08:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:36,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957939004] [2023-08-30 16:08:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957939004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:37,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 16:08:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564768788] [2023-08-30 16:08:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:37,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 16:08:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 16:08:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 16:08:37,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 473 [2023-08-30 16:08:37,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 707 flow. Second operand has 14 states, 14 states have (on average 207.57142857142858) internal successors, (2906), 14 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:37,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:37,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 473 [2023-08-30 16:08:37,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:38,532 INFO L130 PetriNetUnfolder]: 1701/3222 cut-off events. [2023-08-30 16:08:38,532 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-08-30 16:08:38,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8450 conditions, 3222 events. 1701/3222 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 16132 event pairs, 382 based on Foata normal form. 9/3156 useless extension candidates. Maximal degree in co-relation 8418. Up to 1578 conditions per place. [2023-08-30 16:08:38,548 INFO L137 encePairwiseOnDemand]: 457/473 looper letters, 118 selfloop transitions, 37 changer transitions 13/176 dead transitions. [2023-08-30 16:08:38,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 176 transitions, 1228 flow [2023-08-30 16:08:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:08:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:08:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2800 transitions. [2023-08-30 16:08:38,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535859489347863 [2023-08-30 16:08:38,556 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2800 transitions. [2023-08-30 16:08:38,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2800 transitions. [2023-08-30 16:08:38,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:38,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2800 transitions. [2023-08-30 16:08:38,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 215.3846153846154) internal successors, (2800), 13 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:38,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:38,573 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:38,574 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 707 flow. Second operand 13 states and 2800 transitions. [2023-08-30 16:08:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 176 transitions, 1228 flow [2023-08-30 16:08:38,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 176 transitions, 1187 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-30 16:08:38,586 INFO L231 Difference]: Finished difference. Result has 133 places, 111 transitions, 809 flow [2023-08-30 16:08:38,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=809, PETRI_PLACES=133, PETRI_TRANSITIONS=111} [2023-08-30 16:08:38,588 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 70 predicate places. [2023-08-30 16:08:38,588 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 111 transitions, 809 flow [2023-08-30 16:08:38,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 207.57142857142858) internal successors, (2906), 14 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:38,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:38,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:38,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:08:38,589 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:38,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash -785537338, now seen corresponding path program 2 times [2023-08-30 16:08:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:38,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472153441] [2023-08-30 16:08:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:39,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:39,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472153441] [2023-08-30 16:08:39,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472153441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:39,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:39,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 16:08:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100709226] [2023-08-30 16:08:39,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 16:08:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 16:08:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 16:08:40,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 473 [2023-08-30 16:08:40,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 111 transitions, 809 flow. Second operand has 14 states, 14 states have (on average 211.57142857142858) internal successors, (2962), 14 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:40,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:40,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 473 [2023-08-30 16:08:40,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:40,780 INFO L130 PetriNetUnfolder]: 1717/3252 cut-off events. [2023-08-30 16:08:40,781 INFO L131 PetriNetUnfolder]: For 3000/3000 co-relation queries the response was YES. [2023-08-30 16:08:40,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8994 conditions, 3252 events. 1717/3252 cut-off events. For 3000/3000 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 16403 event pairs, 434 based on Foata normal form. 7/3184 useless extension candidates. Maximal degree in co-relation 8958. Up to 1555 conditions per place. [2023-08-30 16:08:40,826 INFO L137 encePairwiseOnDemand]: 457/473 looper letters, 121 selfloop transitions, 36 changer transitions 13/178 dead transitions. [2023-08-30 16:08:40,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1325 flow [2023-08-30 16:08:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:08:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:08:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2851 transitions. [2023-08-30 16:08:40,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636526264433241 [2023-08-30 16:08:40,831 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2851 transitions. [2023-08-30 16:08:40,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2851 transitions. [2023-08-30 16:08:40,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:40,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2851 transitions. [2023-08-30 16:08:40,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 219.30769230769232) internal successors, (2851), 13 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:40,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:40,844 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:40,844 INFO L175 Difference]: Start difference. First operand has 133 places, 111 transitions, 809 flow. Second operand 13 states and 2851 transitions. [2023-08-30 16:08:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1325 flow [2023-08-30 16:08:40,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 178 transitions, 1261 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-08-30 16:08:40,857 INFO L231 Difference]: Finished difference. Result has 139 places, 113 transitions, 867 flow [2023-08-30 16:08:40,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=867, PETRI_PLACES=139, PETRI_TRANSITIONS=113} [2023-08-30 16:08:40,858 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 76 predicate places. [2023-08-30 16:08:40,858 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 113 transitions, 867 flow [2023-08-30 16:08:40,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 211.57142857142858) internal successors, (2962), 14 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:40,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:40,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:08:40,859 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:40,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -224439540, now seen corresponding path program 3 times [2023-08-30 16:08:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667780561] [2023-08-30 16:08:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:41,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667780561] [2023-08-30 16:08:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667780561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:41,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 16:08:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711951258] [2023-08-30 16:08:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:41,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 16:08:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 16:08:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 16:08:42,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 473 [2023-08-30 16:08:42,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 113 transitions, 867 flow. Second operand has 14 states, 14 states have (on average 211.57142857142858) internal successors, (2962), 14 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:42,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:42,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 473 [2023-08-30 16:08:42,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:43,314 INFO L130 PetriNetUnfolder]: 1423/2670 cut-off events. [2023-08-30 16:08:43,314 INFO L131 PetriNetUnfolder]: For 3329/3334 co-relation queries the response was YES. [2023-08-30 16:08:43,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7684 conditions, 2670 events. 1423/2670 cut-off events. For 3329/3334 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 12562 event pairs, 405 based on Foata normal form. 7/2607 useless extension candidates. Maximal degree in co-relation 7646. Up to 1091 conditions per place. [2023-08-30 16:08:43,327 INFO L137 encePairwiseOnDemand]: 457/473 looper letters, 121 selfloop transitions, 36 changer transitions 13/178 dead transitions. [2023-08-30 16:08:43,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 178 transitions, 1362 flow [2023-08-30 16:08:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:08:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:08:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2854 transitions. [2023-08-30 16:08:43,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46414051065213857 [2023-08-30 16:08:43,332 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2854 transitions. [2023-08-30 16:08:43,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2854 transitions. [2023-08-30 16:08:43,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:43,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2854 transitions. [2023-08-30 16:08:43,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 219.53846153846155) internal successors, (2854), 13 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:43,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:43,341 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:43,341 INFO L175 Difference]: Start difference. First operand has 139 places, 113 transitions, 867 flow. Second operand 13 states and 2854 transitions. [2023-08-30 16:08:43,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 178 transitions, 1362 flow [2023-08-30 16:08:43,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 1274 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-08-30 16:08:43,357 INFO L231 Difference]: Finished difference. Result has 140 places, 111 transitions, 870 flow [2023-08-30 16:08:43,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=870, PETRI_PLACES=140, PETRI_TRANSITIONS=111} [2023-08-30 16:08:43,357 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 77 predicate places. [2023-08-30 16:08:43,358 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 111 transitions, 870 flow [2023-08-30 16:08:43,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 211.57142857142858) internal successors, (2962), 14 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:43,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:43,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:08:43,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:43,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1236496857, now seen corresponding path program 1 times [2023-08-30 16:08:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:43,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5961950] [2023-08-30 16:08:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:45,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5961950] [2023-08-30 16:08:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5961950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:45,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-08-30 16:08:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541312759] [2023-08-30 16:08:45,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 16:08:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 16:08:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 16:08:46,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 473 [2023-08-30 16:08:46,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 111 transitions, 870 flow. Second operand has 18 states, 18 states have (on average 203.0) internal successors, (3654), 18 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:46,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:46,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 473 [2023-08-30 16:08:46,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:46,874 INFO L130 PetriNetUnfolder]: 1589/2991 cut-off events. [2023-08-30 16:08:46,875 INFO L131 PetriNetUnfolder]: For 3696/3701 co-relation queries the response was YES. [2023-08-30 16:08:46,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8457 conditions, 2991 events. 1589/2991 cut-off events. For 3696/3701 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14197 event pairs, 302 based on Foata normal form. 8/2920 useless extension candidates. Maximal degree in co-relation 8419. Up to 861 conditions per place. [2023-08-30 16:08:46,887 INFO L137 encePairwiseOnDemand]: 457/473 looper letters, 144 selfloop transitions, 34 changer transitions 10/196 dead transitions. [2023-08-30 16:08:46,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 196 transitions, 1455 flow [2023-08-30 16:08:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:08:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:08:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2764 transitions. [2023-08-30 16:08:46,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44950398438770534 [2023-08-30 16:08:46,892 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2764 transitions. [2023-08-30 16:08:46,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2764 transitions. [2023-08-30 16:08:46,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:46,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2764 transitions. [2023-08-30 16:08:46,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.6153846153846) internal successors, (2764), 13 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:46,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:46,901 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:46,901 INFO L175 Difference]: Start difference. First operand has 140 places, 111 transitions, 870 flow. Second operand 13 states and 2764 transitions. [2023-08-30 16:08:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 196 transitions, 1455 flow [2023-08-30 16:08:46,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 196 transitions, 1377 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-30 16:08:46,918 INFO L231 Difference]: Finished difference. Result has 144 places, 116 transitions, 906 flow [2023-08-30 16:08:46,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=906, PETRI_PLACES=144, PETRI_TRANSITIONS=116} [2023-08-30 16:08:46,919 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 81 predicate places. [2023-08-30 16:08:46,919 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 116 transitions, 906 flow [2023-08-30 16:08:46,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 203.0) internal successors, (3654), 18 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:46,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:46,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:46,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:08:46,920 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:46,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1142379959, now seen corresponding path program 1 times [2023-08-30 16:08:46,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:46,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356590029] [2023-08-30 16:08:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:46,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:49,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356590029] [2023-08-30 16:08:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356590029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:49,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:49,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-30 16:08:49,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330490441] [2023-08-30 16:08:49,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 16:08:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 16:08:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-08-30 16:08:52,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 473 [2023-08-30 16:08:52,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 116 transitions, 906 flow. Second operand has 23 states, 23 states have (on average 182.6086956521739) internal successors, (4200), 23 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:52,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:52,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 473 [2023-08-30 16:08:52,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:55,163 INFO L130 PetriNetUnfolder]: 1890/3589 cut-off events. [2023-08-30 16:08:55,163 INFO L131 PetriNetUnfolder]: For 4289/4295 co-relation queries the response was YES. [2023-08-30 16:08:55,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10272 conditions, 3589 events. 1890/3589 cut-off events. For 4289/4295 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 18092 event pairs, 750 based on Foata normal form. 82/3580 useless extension candidates. Maximal degree in co-relation 10231. Up to 2761 conditions per place. [2023-08-30 16:08:55,175 INFO L137 encePairwiseOnDemand]: 446/473 looper letters, 176 selfloop transitions, 57 changer transitions 32/273 dead transitions. [2023-08-30 16:08:55,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 273 transitions, 2034 flow [2023-08-30 16:08:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 16:08:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 16:08:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6017 transitions. [2023-08-30 16:08:55,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39752906976744184 [2023-08-30 16:08:55,182 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6017 transitions. [2023-08-30 16:08:55,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6017 transitions. [2023-08-30 16:08:55,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:55,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6017 transitions. [2023-08-30 16:08:55,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 188.03125) internal successors, (6017), 32 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:55,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 473.0) internal successors, (15609), 33 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:55,202 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 473.0) internal successors, (15609), 33 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:55,203 INFO L175 Difference]: Start difference. First operand has 144 places, 116 transitions, 906 flow. Second operand 32 states and 6017 transitions. [2023-08-30 16:08:55,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 273 transitions, 2034 flow [2023-08-30 16:08:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 273 transitions, 1949 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-30 16:08:55,223 INFO L231 Difference]: Finished difference. Result has 192 places, 171 transitions, 1437 flow [2023-08-30 16:08:55,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1437, PETRI_PLACES=192, PETRI_TRANSITIONS=171} [2023-08-30 16:08:55,224 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 129 predicate places. [2023-08-30 16:08:55,224 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 171 transitions, 1437 flow [2023-08-30 16:08:55,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.6086956521739) internal successors, (4200), 23 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:55,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:55,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:08:55,226 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:55,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1972154307, now seen corresponding path program 2 times [2023-08-30 16:08:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:55,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514746713] [2023-08-30 16:08:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:58,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:58,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514746713] [2023-08-30 16:08:58,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514746713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:58,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:58,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-30 16:08:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695440936] [2023-08-30 16:08:58,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:58,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 16:08:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 16:08:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-08-30 16:09:01,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 473 [2023-08-30 16:09:01,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 171 transitions, 1437 flow. Second operand has 23 states, 23 states have (on average 182.6086956521739) internal successors, (4200), 23 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:01,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:01,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 473 [2023-08-30 16:09:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:04,328 INFO L130 PetriNetUnfolder]: 2111/4050 cut-off events. [2023-08-30 16:09:04,328 INFO L131 PetriNetUnfolder]: For 53559/53565 co-relation queries the response was YES. [2023-08-30 16:09:04,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18669 conditions, 4050 events. 2111/4050 cut-off events. For 53559/53565 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 21493 event pairs, 650 based on Foata normal form. 86/4120 useless extension candidates. Maximal degree in co-relation 18602. Up to 3128 conditions per place. [2023-08-30 16:09:04,351 INFO L137 encePairwiseOnDemand]: 446/473 looper letters, 223 selfloop transitions, 58 changer transitions 33/322 dead transitions. [2023-08-30 16:09:04,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 322 transitions, 3052 flow [2023-08-30 16:09:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 16:09:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 16:09:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6006 transitions. [2023-08-30 16:09:04,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39680232558139533 [2023-08-30 16:09:04,358 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6006 transitions. [2023-08-30 16:09:04,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6006 transitions. [2023-08-30 16:09:04,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:04,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6006 transitions. [2023-08-30 16:09:04,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 187.6875) internal successors, (6006), 32 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:04,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 473.0) internal successors, (15609), 33 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:04,382 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 473.0) internal successors, (15609), 33 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:04,382 INFO L175 Difference]: Start difference. First operand has 192 places, 171 transitions, 1437 flow. Second operand 32 states and 6006 transitions. [2023-08-30 16:09:04,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 322 transitions, 3052 flow [2023-08-30 16:09:04,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 322 transitions, 3034 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 16:09:04,466 INFO L231 Difference]: Finished difference. Result has 245 places, 220 transitions, 2179 flow [2023-08-30 16:09:04,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2179, PETRI_PLACES=245, PETRI_TRANSITIONS=220} [2023-08-30 16:09:04,467 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 182 predicate places. [2023-08-30 16:09:04,467 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 220 transitions, 2179 flow [2023-08-30 16:09:04,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.6086956521739) internal successors, (4200), 23 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:04,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:04,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:04,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:09:04,469 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:04,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:04,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1706648059, now seen corresponding path program 3 times [2023-08-30 16:09:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:04,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699478008] [2023-08-30 16:09:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:09:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:09:06,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:09:06,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699478008] [2023-08-30 16:09:06,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699478008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:09:06,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:09:06,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-30 16:09:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405517999] [2023-08-30 16:09:06,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:09:06,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 16:09:06,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:09:06,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 16:09:06,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-08-30 16:09:10,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 473 [2023-08-30 16:09:10,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 220 transitions, 2179 flow. Second operand has 23 states, 23 states have (on average 182.6086956521739) internal successors, (4200), 23 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:10,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:10,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 473 [2023-08-30 16:09:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:12,718 INFO L130 PetriNetUnfolder]: 2319/4474 cut-off events. [2023-08-30 16:09:12,718 INFO L131 PetriNetUnfolder]: For 184733/184751 co-relation queries the response was YES. [2023-08-30 16:09:12,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27207 conditions, 4474 events. 2319/4474 cut-off events. For 184733/184751 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 24650 event pairs, 742 based on Foata normal form. 92/4549 useless extension candidates. Maximal degree in co-relation 27113. Up to 3321 conditions per place. [2023-08-30 16:09:12,759 INFO L137 encePairwiseOnDemand]: 447/473 looper letters, 257 selfloop transitions, 71 changer transitions 35/371 dead transitions. [2023-08-30 16:09:12,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 371 transitions, 4400 flow [2023-08-30 16:09:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 16:09:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 16:09:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6195 transitions. [2023-08-30 16:09:12,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39688641168556604 [2023-08-30 16:09:12,765 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6195 transitions. [2023-08-30 16:09:12,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6195 transitions. [2023-08-30 16:09:12,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:12,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6195 transitions. [2023-08-30 16:09:12,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 187.72727272727272) internal successors, (6195), 33 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:12,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 473.0) internal successors, (16082), 34 states have internal predecessors, (16082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:12,785 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 473.0) internal successors, (16082), 34 states have internal predecessors, (16082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:12,785 INFO L175 Difference]: Start difference. First operand has 245 places, 220 transitions, 2179 flow. Second operand 33 states and 6195 transitions. [2023-08-30 16:09:12,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 371 transitions, 4400 flow [2023-08-30 16:09:13,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 371 transitions, 4230 flow, removed 85 selfloop flow, removed 0 redundant places. [2023-08-30 16:09:13,112 INFO L231 Difference]: Finished difference. Result has 296 places, 266 transitions, 2907 flow [2023-08-30 16:09:13,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2907, PETRI_PLACES=296, PETRI_TRANSITIONS=266} [2023-08-30 16:09:13,113 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 233 predicate places. [2023-08-30 16:09:13,113 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 266 transitions, 2907 flow [2023-08-30 16:09:13,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.6086956521739) internal successors, (4200), 23 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:13,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:13,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:13,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 16:09:13,115 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:13,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 963217069, now seen corresponding path program 4 times [2023-08-30 16:09:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998127801] [2023-08-30 16:09:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15