./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:48:28,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:48:28,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:48:28,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:48:28,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:48:28,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:48:28,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:48:28,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:48:28,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:48:28,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:48:28,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:48:28,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:48:28,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:48:28,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:48:28,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:48:28,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:48:28,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:48:28,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:48:28,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:48:28,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:48:28,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:48:28,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:48:28,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:48:28,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:48:28,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:48:28,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:48:28,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:48:28,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:48:28,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:48:28,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:48:28,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:48:28,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:48:28,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:48:28,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:48:28,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:48:28,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:48:28,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:48:28,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:48:28,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:48:28,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:48:28,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:48:28,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 08:48:28,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:48:28,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:48:28,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:48:28,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:48:28,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:48:28,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:48:28,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:48:28,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:48:28,460 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:48:28,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:48:28,461 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:48:28,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:48:28,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:48:28,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:48:28,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:48:28,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:48:28,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:48:28,462 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:48:28,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:48:28,462 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:48:28,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:48:28,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:48:28,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:48:28,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:48:28,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:48:28,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:48:28,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:48:28,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:48:28,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:48:28,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:48:28,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:48:28,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:48:28,465 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:48:28,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:48:28,465 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:48:28,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:48:28,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:48:28,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:48:28,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:48:28,801 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:48:28,801 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:48:28,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue.i [2023-09-01 08:48:30,081 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:48:30,314 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:48:30,315 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i [2023-09-01 08:48:30,332 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e15895c/8a79205e002f4a31a9cf32793333b7b2/FLAGeb842205e [2023-09-01 08:48:30,348 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e15895c/8a79205e002f4a31a9cf32793333b7b2 [2023-09-01 08:48:30,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:48:30,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:48:30,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:48:30,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:48:30,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:48:30,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e51188f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30, skipping insertion in model container [2023-09-01 08:48:30,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:48:30,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:48:30,732 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.i[43284,43297] [2023-09-01 08:48:30,739 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.i[43491,43504] [2023-09-01 08:48:30,747 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.i[43772,43785] [2023-09-01 08:48:30,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:48:30,767 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:48:30,807 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.i[43284,43297] [2023-09-01 08:48:30,809 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.i[43491,43504] [2023-09-01 08:48:30,812 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.i[43772,43785] [2023-09-01 08:48:30,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:48:30,872 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:48:30,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30 WrapperNode [2023-09-01 08:48:30,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:48:30,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:48:30,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:48:30,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:48:30,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,923 INFO L138 Inliner]: procedures = 274, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2023-09-01 08:48:30,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:48:30,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:48:30,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:48:30,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:48:30,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:48:30,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:48:30,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:48:30,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:48:30,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (1/1) ... [2023-09-01 08:48:30,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:48:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:48:31,014 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) [2023-09-01 08:48:31,026 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 [2023-09-01 08:48:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 08:48:31,054 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 08:48:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 08:48:31,054 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 08:48:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:48:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:48:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:48:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:48:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 08:48:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:48:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:48:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:48:31,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:48:31,060 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:48:31,191 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:48:31,193 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:48:31,673 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:48:31,685 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:48:31,686 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 08:48:31,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:48:31 BoogieIcfgContainer [2023-09-01 08:48:31,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:48:31,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:48:31,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:48:31,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:48:31,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:48:30" (1/3) ... [2023-09-01 08:48:31,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d809f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:48:31, skipping insertion in model container [2023-09-01 08:48:31,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:48:30" (2/3) ... [2023-09-01 08:48:31,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d809f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:48:31, skipping insertion in model container [2023-09-01 08:48:31,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:48:31" (3/3) ... [2023-09-01 08:48:31,697 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-09-01 08:48:31,704 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:48:31,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:48:31,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-09-01 08:48:31,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:48:31,888 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:48:31,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 266 transitions, 548 flow [2023-09-01 08:48:32,117 INFO L130 PetriNetUnfolder]: 15/264 cut-off events. [2023-09-01 08:48:32,117 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:48:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 264 events. 15/264 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 358 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 193. Up to 2 conditions per place. [2023-09-01 08:48:32,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 266 transitions, 548 flow [2023-09-01 08:48:32,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 255 transitions, 519 flow [2023-09-01 08:48:32,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:48:32,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 255 transitions, 519 flow [2023-09-01 08:48:32,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 255 transitions, 519 flow [2023-09-01 08:48:32,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 255 transitions, 519 flow [2023-09-01 08:48:32,224 INFO L130 PetriNetUnfolder]: 15/255 cut-off events. [2023-09-01 08:48:32,225 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:48:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 255 events. 15/255 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 324 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 193. Up to 2 conditions per place. [2023-09-01 08:48:32,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 15864 [2023-09-01 08:48:40,262 INFO L134 LiptonReduction]: Checked pairs total: 35874 [2023-09-01 08:48:40,262 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-09-01 08:48:40,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:48:40,281 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;@7535c588, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:48:40,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-09-01 08:48:40,285 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-09-01 08:48:40,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:48:40,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:40,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:48:40,286 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)] === [2023-09-01 08:48:40,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash 31999, now seen corresponding path program 1 times [2023-09-01 08:48:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:40,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513907768] [2023-09-01 08:48:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:40,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513907768] [2023-09-01 08:48:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513907768] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:40,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:40,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:48:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721365995] [2023-09-01 08:48:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:40,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 08:48:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 08:48:40,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 08:48:40,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 482 [2023-09-01 08:48:40,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 143 flow. Second operand has 2 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:40,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:40,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 482 [2023-09-01 08:48:40,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:40,772 INFO L130 PetriNetUnfolder]: 1489/2562 cut-off events. [2023-09-01 08:48:40,773 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-09-01 08:48:40,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 2562 events. 1489/2562 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 12043 event pairs, 1167 based on Foata normal form. 32/2225 useless extension candidates. Maximal degree in co-relation 4794. Up to 2313 conditions per place. [2023-09-01 08:48:40,785 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 52 selfloop transitions, 0 changer transitions 0/62 dead transitions. [2023-09-01 08:48:40,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 237 flow [2023-09-01 08:48:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 08:48:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 08:48:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 561 transitions. [2023-09-01 08:48:40,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5819502074688797 [2023-09-01 08:48:40,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 561 transitions. [2023-09-01 08:48:40,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 561 transitions. [2023-09-01 08:48:40,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:40,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 561 transitions. [2023-09-01 08:48:40,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:40,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 482.0) internal successors, (1446), 3 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:40,824 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 482.0) internal successors, (1446), 3 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:40,826 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 143 flow. Second operand 2 states and 561 transitions. [2023-09-01 08:48:40,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 237 flow [2023-09-01 08:48:40,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 232 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:48:40,833 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 128 flow [2023-09-01 08:48:40,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-09-01 08:48:40,838 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -4 predicate places. [2023-09-01 08:48:40,839 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 128 flow [2023-09-01 08:48:40,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:40,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:40,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:40,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:48:40,843 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)] === [2023-09-01 08:48:40,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1793584973, now seen corresponding path program 1 times [2023-09-01 08:48:40,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:40,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199973148] [2023-09-01 08:48:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:40,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:41,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:41,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199973148] [2023-09-01 08:48:41,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199973148] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:41,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 08:48:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650283008] [2023-09-01 08:48:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:41,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:48:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:48:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:48:41,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 482 [2023-09-01 08:48:41,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:41,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:41,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 482 [2023-09-01 08:48:41,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:41,311 INFO L130 PetriNetUnfolder]: 1457/2528 cut-off events. [2023-09-01 08:48:41,311 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:48:41,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 2528 events. 1457/2528 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 12005 event pairs, 1122 based on Foata normal form. 0/2191 useless extension candidates. Maximal degree in co-relation 4861. Up to 2166 conditions per place. [2023-09-01 08:48:41,324 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 67 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-09-01 08:48:41,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 306 flow [2023-09-01 08:48:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:48:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:48:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 815 transitions. [2023-09-01 08:48:41,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636237897648686 [2023-09-01 08:48:41,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 815 transitions. [2023-09-01 08:48:41,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 815 transitions. [2023-09-01 08:48:41,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:41,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 815 transitions. [2023-09-01 08:48:41,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:41,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 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) [2023-09-01 08:48:41,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 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) [2023-09-01 08:48:41,334 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 128 flow. Second operand 3 states and 815 transitions. [2023-09-01 08:48:41,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 306 flow [2023-09-01 08:48:41,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 08:48:41,336 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 132 flow [2023-09-01 08:48:41,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-09-01 08:48:41,337 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-09-01 08:48:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 132 flow [2023-09-01 08:48:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:41,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:41,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:48:41,341 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)] === [2023-09-01 08:48:41,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1351646121, now seen corresponding path program 1 times [2023-09-01 08:48:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:41,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130333691] [2023-09-01 08:48:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:42,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:42,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130333691] [2023-09-01 08:48:42,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130333691] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:42,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:42,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 08:48:42,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030290144] [2023-09-01 08:48:42,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:42,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:48:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:48:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:48:43,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 482 [2023-09-01 08:48:43,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:43,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:43,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 482 [2023-09-01 08:48:43,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:44,199 INFO L130 PetriNetUnfolder]: 1557/2661 cut-off events. [2023-09-01 08:48:44,199 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 08:48:44,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5260 conditions, 2661 events. 1557/2661 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 12368 event pairs, 1200 based on Foata normal form. 0/2315 useless extension candidates. Maximal degree in co-relation 5256. Up to 2435 conditions per place. [2023-09-01 08:48:44,213 INFO L137 encePairwiseOnDemand]: 475/482 looper letters, 56 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2023-09-01 08:48:44,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 288 flow [2023-09-01 08:48:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:48:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:48:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1440 transitions. [2023-09-01 08:48:44,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979253112033195 [2023-09-01 08:48:44,218 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1440 transitions. [2023-09-01 08:48:44,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1440 transitions. [2023-09-01 08:48:44,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:44,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1440 transitions. [2023-09-01 08:48:44,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:44,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:44,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:44,229 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 132 flow. Second operand 6 states and 1440 transitions. [2023-09-01 08:48:44,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 288 flow [2023-09-01 08:48:44,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:48:44,233 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 184 flow [2023-09-01 08:48:44,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2023-09-01 08:48:44,235 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-09-01 08:48:44,235 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 184 flow [2023-09-01 08:48:44,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.4) internal successors, (1157), 5 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:44,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:44,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:44,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 08:48:44,237 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)] === [2023-09-01 08:48:44,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:44,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1063417523, now seen corresponding path program 1 times [2023-09-01 08:48:44,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:44,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478344029] [2023-09-01 08:48:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:44,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:44,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478344029] [2023-09-01 08:48:44,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478344029] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:44,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:44,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 08:48:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712847017] [2023-09-01 08:48:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:48:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:48:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:48:45,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 482 [2023-09-01 08:48:45,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:45,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:45,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 482 [2023-09-01 08:48:45,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:45,648 INFO L130 PetriNetUnfolder]: 1732/2919 cut-off events. [2023-09-01 08:48:45,649 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2023-09-01 08:48:45,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5953 conditions, 2919 events. 1732/2919 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13903 event pairs, 297 based on Foata normal form. 17/2612 useless extension candidates. Maximal degree in co-relation 5945. Up to 2384 conditions per place. [2023-09-01 08:48:45,663 INFO L137 encePairwiseOnDemand]: 476/482 looper letters, 92 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2023-09-01 08:48:45,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 484 flow [2023-09-01 08:48:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:48:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:48:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1233 transitions. [2023-09-01 08:48:45,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116182572614107 [2023-09-01 08:48:45,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1233 transitions. [2023-09-01 08:48:45,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1233 transitions. [2023-09-01 08:48:45,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:45,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1233 transitions. [2023-09-01 08:48:45,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.6) internal successors, (1233), 5 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:45,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 482.0) internal successors, (2892), 6 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:45,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 482.0) internal successors, (2892), 6 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:45,681 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 184 flow. Second operand 5 states and 1233 transitions. [2023-09-01 08:48:45,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 484 flow [2023-09-01 08:48:45,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 110 transitions, 484 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 08:48:45,687 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 246 flow [2023-09-01 08:48:45,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2023-09-01 08:48:45,688 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-09-01 08:48:45,689 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 246 flow [2023-09-01 08:48:45,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:45,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:45,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:45,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:48:45,690 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)] === [2023-09-01 08:48:45,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash -306674726, now seen corresponding path program 1 times [2023-09-01 08:48:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910374677] [2023-09-01 08:48:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:46,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:46,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910374677] [2023-09-01 08:48:46,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910374677] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:46,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:46,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 08:48:46,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463948463] [2023-09-01 08:48:46,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 08:48:46,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 08:48:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 08:48:47,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 482 [2023-09-01 08:48:47,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 246 flow. Second operand has 9 states, 9 states have (on average 215.44444444444446) internal successors, (1939), 9 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:47,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 482 [2023-09-01 08:48:47,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:47,512 INFO L130 PetriNetUnfolder]: 1737/2937 cut-off events. [2023-09-01 08:48:47,512 INFO L131 PetriNetUnfolder]: For 646/646 co-relation queries the response was YES. [2023-09-01 08:48:47,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2937 events. 1737/2937 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14004 event pairs, 1240 based on Foata normal form. 0/2610 useless extension candidates. Maximal degree in co-relation 6288. Up to 2710 conditions per place. [2023-09-01 08:48:47,528 INFO L137 encePairwiseOnDemand]: 472/482 looper letters, 70 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2023-09-01 08:48:47,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 93 transitions, 459 flow [2023-09-01 08:48:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:48:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:48:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1791 transitions. [2023-09-01 08:48:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644709543568465 [2023-09-01 08:48:47,533 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1791 transitions. [2023-09-01 08:48:47,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1791 transitions. [2023-09-01 08:48:47,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:47,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1791 transitions. [2023-09-01 08:48:47,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 223.875) internal successors, (1791), 8 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 482.0) internal successors, (4338), 9 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,544 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 482.0) internal successors, (4338), 9 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,545 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 246 flow. Second operand 8 states and 1791 transitions. [2023-09-01 08:48:47,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 93 transitions, 459 flow [2023-09-01 08:48:47,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 93 transitions, 451 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-09-01 08:48:47,552 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 312 flow [2023-09-01 08:48:47,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=312, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-09-01 08:48:47,554 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2023-09-01 08:48:47,554 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 312 flow [2023-09-01 08:48:47,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 215.44444444444446) internal successors, (1939), 9 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:47,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:48:47,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:48:47,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1111539889, now seen corresponding path program 1 times [2023-09-01 08:48:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193406570] [2023-09-01 08:48:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:47,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193406570] [2023-09-01 08:48:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193406570] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:47,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:48:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198882141] [2023-09-01 08:48:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:48:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:48:47,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:48:47,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 482 [2023-09-01 08:48:47,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:47,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 482 [2023-09-01 08:48:47,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:47,896 INFO L130 PetriNetUnfolder]: 1231/2113 cut-off events. [2023-09-01 08:48:47,897 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2023-09-01 08:48:47,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4496 conditions, 2113 events. 1231/2113 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8208 event pairs, 573 based on Foata normal form. 52/1876 useless extension candidates. Maximal degree in co-relation 4480. Up to 1265 conditions per place. [2023-09-01 08:48:47,909 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 81 selfloop transitions, 3 changer transitions 4/98 dead transitions. [2023-09-01 08:48:47,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 98 transitions, 510 flow [2023-09-01 08:48:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:48:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:48:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-09-01 08:48:47,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670816044260027 [2023-09-01 08:48:47,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-09-01 08:48:47,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-09-01 08:48:47,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:47,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-09-01 08:48:47,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 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) [2023-09-01 08:48:47,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 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) [2023-09-01 08:48:47,919 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 312 flow. Second operand 3 states and 820 transitions. [2023-09-01 08:48:47,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 98 transitions, 510 flow [2023-09-01 08:48:47,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 457 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-09-01 08:48:47,926 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 243 flow [2023-09-01 08:48:47,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-09-01 08:48:47,929 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-09-01 08:48:47,929 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 243 flow [2023-09-01 08:48:47,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:47,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:47,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:47,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:48:47,931 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)] === [2023-09-01 08:48:47,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:47,931 INFO L85 PathProgramCache]: Analyzing trace with hash 38477220, now seen corresponding path program 1 times [2023-09-01 08:48:47,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155207416] [2023-09-01 08:48:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155207416] [2023-09-01 08:48:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155207416] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:48,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:48,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 08:48:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663756709] [2023-09-01 08:48:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 08:48:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 08:48:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-09-01 08:48:49,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 482 [2023-09-01 08:48:49,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 243 flow. Second operand has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:49,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:49,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 482 [2023-09-01 08:48:49,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:50,473 INFO L130 PetriNetUnfolder]: 1378/2429 cut-off events. [2023-09-01 08:48:50,473 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2023-09-01 08:48:50,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 2429 events. 1378/2429 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10166 event pairs, 378 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 5072. Up to 1785 conditions per place. [2023-09-01 08:48:50,487 INFO L137 encePairwiseOnDemand]: 472/482 looper letters, 89 selfloop transitions, 17 changer transitions 9/124 dead transitions. [2023-09-01 08:48:50,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 590 flow [2023-09-01 08:48:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:48:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:48:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1795 transitions. [2023-09-01 08:48:50,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46550829875518673 [2023-09-01 08:48:50,493 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1795 transitions. [2023-09-01 08:48:50,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1795 transitions. [2023-09-01 08:48:50,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:50,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1795 transitions. [2023-09-01 08:48:50,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:50,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 482.0) internal successors, (4338), 9 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:50,504 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 482.0) internal successors, (4338), 9 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:50,504 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 243 flow. Second operand 8 states and 1795 transitions. [2023-09-01 08:48:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 590 flow [2023-09-01 08:48:50,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 587 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:48:50,508 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 308 flow [2023-09-01 08:48:50,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=308, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-09-01 08:48:50,509 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-09-01 08:48:50,509 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 308 flow [2023-09-01 08:48:50,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:50,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:50,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:50,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 08:48:50,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:48:50,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -917016712, now seen corresponding path program 2 times [2023-09-01 08:48:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:50,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938357782] [2023-09-01 08:48:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938357782] [2023-09-01 08:48:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938357782] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:51,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:51,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 08:48:51,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853796442] [2023-09-01 08:48:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:51,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 08:48:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 08:48:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 08:48:52,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 482 [2023-09-01 08:48:52,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 308 flow. Second operand has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:52,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:52,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 482 [2023-09-01 08:48:52,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:52,875 INFO L130 PetriNetUnfolder]: 1459/2574 cut-off events. [2023-09-01 08:48:52,876 INFO L131 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2023-09-01 08:48:52,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5573 conditions, 2574 events. 1459/2574 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11062 event pairs, 469 based on Foata normal form. 0/2215 useless extension candidates. Maximal degree in co-relation 5558. Up to 1623 conditions per place. [2023-09-01 08:48:52,890 INFO L137 encePairwiseOnDemand]: 472/482 looper letters, 88 selfloop transitions, 19 changer transitions 8/124 dead transitions. [2023-09-01 08:48:52,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 651 flow [2023-09-01 08:48:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:48:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:48:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1792 transitions. [2023-09-01 08:48:52,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46473029045643155 [2023-09-01 08:48:52,900 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1792 transitions. [2023-09-01 08:48:52,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1792 transitions. [2023-09-01 08:48:52,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:52,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1792 transitions. [2023-09-01 08:48:52,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:52,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 482.0) internal successors, (4338), 9 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:52,914 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 482.0) internal successors, (4338), 9 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:52,914 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 308 flow. Second operand 8 states and 1792 transitions. [2023-09-01 08:48:52,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 651 flow [2023-09-01 08:48:52,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 619 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 08:48:52,919 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 351 flow [2023-09-01 08:48:52,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=351, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2023-09-01 08:48:52,921 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-09-01 08:48:52,921 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 351 flow [2023-09-01 08:48:52,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:52,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:52,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:48:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 08:48:52,923 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)] === [2023-09-01 08:48:52,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:52,923 INFO L85 PathProgramCache]: Analyzing trace with hash -916987882, now seen corresponding path program 3 times [2023-09-01 08:48:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137986792] [2023-09-01 08:48:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:54,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:54,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137986792] [2023-09-01 08:48:54,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137986792] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:54,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:54,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 08:48:54,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951592457] [2023-09-01 08:48:54,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:54,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 08:48:54,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 08:48:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-09-01 08:48:55,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 482 [2023-09-01 08:48:55,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 351 flow. Second operand has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:55,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:55,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 482 [2023-09-01 08:48:55,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:56,096 INFO L130 PetriNetUnfolder]: 1446/2562 cut-off events. [2023-09-01 08:48:56,096 INFO L131 PetriNetUnfolder]: For 543/543 co-relation queries the response was YES. [2023-09-01 08:48:56,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5600 conditions, 2562 events. 1446/2562 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11107 event pairs, 406 based on Foata normal form. 0/2217 useless extension candidates. Maximal degree in co-relation 5583. Up to 1877 conditions per place. [2023-09-01 08:48:56,109 INFO L137 encePairwiseOnDemand]: 472/482 looper letters, 94 selfloop transitions, 18 changer transitions 10/130 dead transitions. [2023-09-01 08:48:56,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 706 flow [2023-09-01 08:48:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:48:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:48:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2012 transitions. [2023-09-01 08:48:56,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638082065467958 [2023-09-01 08:48:56,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2012 transitions. [2023-09-01 08:48:56,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2012 transitions. [2023-09-01 08:48:56,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:56,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2012 transitions. [2023-09-01 08:48:56,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.55555555555554) internal successors, (2012), 9 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,140 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,140 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 351 flow. Second operand 9 states and 2012 transitions. [2023-09-01 08:48:56,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 706 flow [2023-09-01 08:48:56,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 683 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-09-01 08:48:56,145 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 356 flow [2023-09-01 08:48:56,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=356, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-09-01 08:48:56,146 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2023-09-01 08:48:56,148 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 356 flow [2023-09-01 08:48:56,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.4) internal successors, (2124), 10 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:56,150 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] [2023-09-01 08:48:56,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 08:48:56,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:48:56,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash 546649345, now seen corresponding path program 1 times [2023-09-01 08:48:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379396901] [2023-09-01 08:48:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:56,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379396901] [2023-09-01 08:48:56,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379396901] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:56,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:56,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 08:48:56,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128757893] [2023-09-01 08:48:56,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:56,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:48:56,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:56,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:48:56,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:48:56,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 482 [2023-09-01 08:48:56,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:48:56,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 482 [2023-09-01 08:48:56,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:48:56,453 INFO L130 PetriNetUnfolder]: 888/1663 cut-off events. [2023-09-01 08:48:56,453 INFO L131 PetriNetUnfolder]: For 437/437 co-relation queries the response was YES. [2023-09-01 08:48:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1663 events. 888/1663 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6927 event pairs, 166 based on Foata normal form. 2/1525 useless extension candidates. Maximal degree in co-relation 3785. Up to 1180 conditions per place. [2023-09-01 08:48:56,462 INFO L137 encePairwiseOnDemand]: 476/482 looper letters, 71 selfloop transitions, 6 changer transitions 1/90 dead transitions. [2023-09-01 08:48:56,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 551 flow [2023-09-01 08:48:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:48:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:48:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-09-01 08:48:56,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518672199170125 [2023-09-01 08:48:56,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-09-01 08:48:56,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-09-01 08:48:56,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:48:56,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-09-01 08:48:56,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 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) [2023-09-01 08:48:56,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 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) [2023-09-01 08:48:56,469 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 356 flow. Second operand 3 states and 798 transitions. [2023-09-01 08:48:56,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 551 flow [2023-09-01 08:48:56,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 499 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-09-01 08:48:56,473 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 318 flow [2023-09-01 08:48:56,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-09-01 08:48:56,476 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-09-01 08:48:56,476 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 318 flow [2023-09-01 08:48:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:48:56,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:48:56,476 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] [2023-09-01 08:48:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 08:48:56,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:48:56,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:48:56,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1906929845, now seen corresponding path program 1 times [2023-09-01 08:48:56,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:48:56,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006848754] [2023-09-01 08:48:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:48:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:48:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:48:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:48:58,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:48:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006848754] [2023-09-01 08:48:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006848754] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:48:58,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:48:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-09-01 08:48:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302720562] [2023-09-01 08:48:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:48:58,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:48:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:48:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:48:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:49:00,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 482 [2023-09-01 08:49:00,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 318 flow. Second operand has 16 states, 16 states have (on average 218.1875) internal successors, (3491), 16 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:00,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:49:00,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 482 [2023-09-01 08:49:00,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:49:01,756 INFO L130 PetriNetUnfolder]: 1593/3015 cut-off events. [2023-09-01 08:49:01,757 INFO L131 PetriNetUnfolder]: For 396/400 co-relation queries the response was YES. [2023-09-01 08:49:01,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6720 conditions, 3015 events. 1593/3015 cut-off events. For 396/400 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 15281 event pairs, 326 based on Foata normal form. 1/2877 useless extension candidates. Maximal degree in co-relation 6704. Up to 1097 conditions per place. [2023-09-01 08:49:01,772 INFO L137 encePairwiseOnDemand]: 463/482 looper letters, 168 selfloop transitions, 42 changer transitions 14/232 dead transitions. [2023-09-01 08:49:01,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 232 transitions, 1166 flow [2023-09-01 08:49:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 08:49:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 08:49:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4755 transitions. [2023-09-01 08:49:01,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469768820391227 [2023-09-01 08:49:01,785 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4755 transitions. [2023-09-01 08:49:01,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4755 transitions. [2023-09-01 08:49:01,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:49:01,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4755 transitions. [2023-09-01 08:49:01,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 226.42857142857142) internal successors, (4755), 21 states have internal predecessors, (4755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:01,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 482.0) internal successors, (10604), 22 states have internal predecessors, (10604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:01,813 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 482.0) internal successors, (10604), 22 states have internal predecessors, (10604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:01,813 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 318 flow. Second operand 21 states and 4755 transitions. [2023-09-01 08:49:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 232 transitions, 1166 flow [2023-09-01 08:49:01,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 232 transitions, 1146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:49:01,820 INFO L231 Difference]: Finished difference. Result has 108 places, 100 transitions, 535 flow [2023-09-01 08:49:01,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=535, PETRI_PLACES=108, PETRI_TRANSITIONS=100} [2023-09-01 08:49:01,821 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 45 predicate places. [2023-09-01 08:49:01,821 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 100 transitions, 535 flow [2023-09-01 08:49:01,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 218.1875) internal successors, (3491), 16 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:01,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:49:01,823 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] [2023-09-01 08:49:01,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 08:49:01,823 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 08:49:01,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:49:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1823393625, now seen corresponding path program 2 times [2023-09-01 08:49:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:49:01,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866340882] [2023-09-01 08:49:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:49:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:49:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:49:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:49:03,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:49:03,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866340882] [2023-09-01 08:49:03,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866340882] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:49:03,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:49:03,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 08:49:03,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111641675] [2023-09-01 08:49:03,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:49:03,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 08:49:03,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:49:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 08:49:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-09-01 08:49:03,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 482 [2023-09-01 08:49:03,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 100 transitions, 535 flow. Second operand has 11 states, 11 states have (on average 223.1818181818182) internal successors, (2455), 11 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:03,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:49:03,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 482 [2023-09-01 08:49:03,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:49:04,120 INFO L130 PetriNetUnfolder]: 1338/2509 cut-off events. [2023-09-01 08:49:04,120 INFO L131 PetriNetUnfolder]: For 788/790 co-relation queries the response was YES. [2023-09-01 08:49:04,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6144 conditions, 2509 events. 1338/2509 cut-off events. For 788/790 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 11809 event pairs, 405 based on Foata normal form. 28/2471 useless extension candidates. Maximal degree in co-relation 6120. Up to 893 conditions per place. [2023-09-01 08:49:04,135 INFO L137 encePairwiseOnDemand]: 468/482 looper letters, 113 selfloop transitions, 26 changer transitions 7/154 dead transitions. [2023-09-01 08:49:04,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 946 flow [2023-09-01 08:49:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:49:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:49:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2104 transitions. [2023-09-01 08:49:04,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850161364684186 [2023-09-01 08:49:04,141 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2104 transitions. [2023-09-01 08:49:04,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2104 transitions. [2023-09-01 08:49:04,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:49:04,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2104 transitions. [2023-09-01 08:49:04,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 233.77777777777777) internal successors, (2104), 9 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:04,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:04,151 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 482.0) internal successors, (4820), 10 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:04,151 INFO L175 Difference]: Start difference. First operand has 108 places, 100 transitions, 535 flow. Second operand 9 states and 2104 transitions. [2023-09-01 08:49:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 946 flow [2023-09-01 08:49:04,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 836 flow, removed 21 selfloop flow, removed 16 redundant places. [2023-09-01 08:49:04,159 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 498 flow [2023-09-01 08:49:04,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2023-09-01 08:49:04,159 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2023-09-01 08:49:04,160 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 498 flow [2023-09-01 08:49:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 223.1818181818182) internal successors, (2455), 11 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:04,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:49:04,161 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] [2023-09-01 08:49:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 08:49:04,161 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)] === [2023-09-01 08:49:04,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:49:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1157294127, now seen corresponding path program 3 times [2023-09-01 08:49:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:49:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133767669] [2023-09-01 08:49:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:49:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:49:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:49:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:49:05,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:49:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133767669] [2023-09-01 08:49:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133767669] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:49:05,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:49:05,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 08:49:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907951813] [2023-09-01 08:49:05,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:49:05,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 08:49:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:49:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 08:49:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:49:05,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 482 [2023-09-01 08:49:05,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 498 flow. Second operand has 12 states, 12 states have (on average 220.91666666666666) internal successors, (2651), 12 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:05,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:49:05,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 482 [2023-09-01 08:49:05,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:49:06,622 INFO L130 PetriNetUnfolder]: 1141/2151 cut-off events. [2023-09-01 08:49:06,622 INFO L131 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2023-09-01 08:49:06,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2151 events. 1141/2151 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9631 event pairs, 254 based on Foata normal form. 14/2103 useless extension candidates. Maximal degree in co-relation 5412. Up to 793 conditions per place. [2023-09-01 08:49:06,632 INFO L137 encePairwiseOnDemand]: 471/482 looper letters, 110 selfloop transitions, 25 changer transitions 11/154 dead transitions. [2023-09-01 08:49:06,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 935 flow [2023-09-01 08:49:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 08:49:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 08:49:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2519 transitions. [2023-09-01 08:49:06,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475103734439834 [2023-09-01 08:49:06,638 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2519 transitions. [2023-09-01 08:49:06,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2519 transitions. [2023-09-01 08:49:06,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:49:06,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2519 transitions. [2023-09-01 08:49:06,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 229.0) internal successors, (2519), 11 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:06,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:06,651 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:06,652 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 498 flow. Second operand 11 states and 2519 transitions. [2023-09-01 08:49:06,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 935 flow [2023-09-01 08:49:06,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 912 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 08:49:06,658 INFO L231 Difference]: Finished difference. Result has 108 places, 97 transitions, 551 flow [2023-09-01 08:49:06,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=551, PETRI_PLACES=108, PETRI_TRANSITIONS=97} [2023-09-01 08:49:06,659 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 45 predicate places. [2023-09-01 08:49:06,659 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 97 transitions, 551 flow [2023-09-01 08:49:06,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.91666666666666) internal successors, (2651), 12 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:06,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:49:06,661 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] [2023-09-01 08:49:06,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 08:49:06,661 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)] === [2023-09-01 08:49:06,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:49:06,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1116139787, now seen corresponding path program 1 times [2023-09-01 08:49:06,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:49:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869245290] [2023-09-01 08:49:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:49:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:49:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:49:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:49:09,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:49:09,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869245290] [2023-09-01 08:49:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869245290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:49:09,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:49:09,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-09-01 08:49:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400184377] [2023-09-01 08:49:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:49:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:49:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:49:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:49:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:49:09,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 482 [2023-09-01 08:49:09,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 97 transitions, 551 flow. Second operand has 15 states, 15 states have (on average 215.4) internal successors, (3231), 15 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:09,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:49:09,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 482 [2023-09-01 08:49:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:49:10,768 INFO L130 PetriNetUnfolder]: 1323/2495 cut-off events. [2023-09-01 08:49:10,768 INFO L131 PetriNetUnfolder]: For 1388/1390 co-relation queries the response was YES. [2023-09-01 08:49:10,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6382 conditions, 2495 events. 1323/2495 cut-off events. For 1388/1390 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 11684 event pairs, 527 based on Foata normal form. 0/2421 useless extension candidates. Maximal degree in co-relation 6361. Up to 1474 conditions per place. [2023-09-01 08:49:10,781 INFO L137 encePairwiseOnDemand]: 469/482 looper letters, 135 selfloop transitions, 27 changer transitions 11/181 dead transitions. [2023-09-01 08:49:10,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 181 transitions, 1117 flow [2023-09-01 08:49:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:49:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:49:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2705 transitions. [2023-09-01 08:49:10,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676694329183956 [2023-09-01 08:49:10,787 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2705 transitions. [2023-09-01 08:49:10,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2705 transitions. [2023-09-01 08:49:10,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:49:10,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2705 transitions. [2023-09-01 08:49:10,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 225.41666666666666) internal successors, (2705), 12 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:10,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:10,803 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:10,803 INFO L175 Difference]: Start difference. First operand has 108 places, 97 transitions, 551 flow. Second operand 12 states and 2705 transitions. [2023-09-01 08:49:10,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 181 transitions, 1117 flow [2023-09-01 08:49:10,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 181 transitions, 1086 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 08:49:10,812 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 628 flow [2023-09-01 08:49:10,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=628, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-09-01 08:49:10,813 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 52 predicate places. [2023-09-01 08:49:10,813 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 628 flow [2023-09-01 08:49:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 215.4) internal successors, (3231), 15 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:10,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:49:10,814 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] [2023-09-01 08:49:10,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 08:49:10,814 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)] === [2023-09-01 08:49:10,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:49:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1441368751, now seen corresponding path program 2 times [2023-09-01 08:49:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:49:10,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78561033] [2023-09-01 08:49:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:49:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:49:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:49:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:49:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:49:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78561033] [2023-09-01 08:49:12,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78561033] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:49:12,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:49:12,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-09-01 08:49:12,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983875823] [2023-09-01 08:49:12,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:49:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 08:49:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:49:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 08:49:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:49:13,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 482 [2023-09-01 08:49:13,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 628 flow. Second operand has 15 states, 15 states have (on average 215.4) internal successors, (3231), 15 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:13,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:49:13,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 482 [2023-09-01 08:49:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:49:14,392 INFO L130 PetriNetUnfolder]: 1522/2894 cut-off events. [2023-09-01 08:49:14,393 INFO L131 PetriNetUnfolder]: For 1804/1804 co-relation queries the response was YES. [2023-09-01 08:49:14,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7428 conditions, 2894 events. 1522/2894 cut-off events. For 1804/1804 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14272 event pairs, 362 based on Foata normal form. 8/2828 useless extension candidates. Maximal degree in co-relation 7404. Up to 921 conditions per place. [2023-09-01 08:49:14,408 INFO L137 encePairwiseOnDemand]: 469/482 looper letters, 134 selfloop transitions, 32 changer transitions 11/185 dead transitions. [2023-09-01 08:49:14,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 1204 flow [2023-09-01 08:49:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:49:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:49:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2701 transitions. [2023-09-01 08:49:14,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46697786998616875 [2023-09-01 08:49:14,412 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2701 transitions. [2023-09-01 08:49:14,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2701 transitions. [2023-09-01 08:49:14,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:49:14,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2701 transitions. [2023-09-01 08:49:14,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 225.08333333333334) internal successors, (2701), 12 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:14,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:14,423 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:14,423 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 628 flow. Second operand 12 states and 2701 transitions. [2023-09-01 08:49:14,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 1204 flow [2023-09-01 08:49:14,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 185 transitions, 1160 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-09-01 08:49:14,433 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 705 flow [2023-09-01 08:49:14,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=705, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2023-09-01 08:49:14,433 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 59 predicate places. [2023-09-01 08:49:14,434 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 705 flow [2023-09-01 08:49:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 215.4) internal successors, (3231), 15 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:14,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:49:14,435 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] [2023-09-01 08:49:14,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 08:49:14,435 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)] === [2023-09-01 08:49:14,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:49:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1674967413, now seen corresponding path program 3 times [2023-09-01 08:49:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:49:14,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300225520] [2023-09-01 08:49:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:49:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:49:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:49:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:49:18,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:49:18,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300225520] [2023-09-01 08:49:18,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300225520] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:49:18,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:49:18,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-09-01 08:49:18,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219378196] [2023-09-01 08:49:18,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:49:18,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:49:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:49:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:49:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:49:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 482 [2023-09-01 08:49:19,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 705 flow. Second operand has 16 states, 16 states have (on average 218.25) internal successors, (3492), 16 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:19,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:49:19,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 482 [2023-09-01 08:49:19,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:49:19,888 INFO L130 PetriNetUnfolder]: 1692/3219 cut-off events. [2023-09-01 08:49:19,889 INFO L131 PetriNetUnfolder]: For 2508/2508 co-relation queries the response was YES. [2023-09-01 08:49:19,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8400 conditions, 3219 events. 1692/3219 cut-off events. For 2508/2508 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 15893 event pairs, 187 based on Foata normal form. 8/3144 useless extension candidates. Maximal degree in co-relation 8373. Up to 882 conditions per place. [2023-09-01 08:49:19,910 INFO L137 encePairwiseOnDemand]: 470/482 looper letters, 135 selfloop transitions, 33 changer transitions 11/187 dead transitions. [2023-09-01 08:49:19,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 187 transitions, 1275 flow [2023-09-01 08:49:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:49:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:49:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2737 transitions. [2023-09-01 08:49:19,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732019363762102 [2023-09-01 08:49:19,914 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2737 transitions. [2023-09-01 08:49:19,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2737 transitions. [2023-09-01 08:49:19,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:49:19,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2737 transitions. [2023-09-01 08:49:19,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 228.08333333333334) internal successors, (2737), 12 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:19,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:19,927 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:19,927 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 705 flow. Second operand 12 states and 2737 transitions. [2023-09-01 08:49:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 187 transitions, 1275 flow [2023-09-01 08:49:19,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 187 transitions, 1217 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-09-01 08:49:19,941 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 761 flow [2023-09-01 08:49:19,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=761, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2023-09-01 08:49:19,942 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 64 predicate places. [2023-09-01 08:49:19,942 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 761 flow [2023-09-01 08:49:19,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 218.25) internal successors, (3492), 16 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:49:19,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:49:19,943 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] [2023-09-01 08:49:19,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 08:49:19,943 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)] === [2023-09-01 08:49:19,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:49:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash 241474651, now seen corresponding path program 1 times [2023-09-01 08:49:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:49:19,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640366866] [2023-09-01 08:49:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:49:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:49:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15